McHenry County, IL — Same-Day AC Repair
Furnace Repair in
Algonquin, IL
Airwave provides licensed gas furnace and heating repair throughout Algonquin, on both the McHenry and Kane County sides of the village — same-day for standard calls, 24/7 emergency response. Combustion analysis and carbon monoxide testing are included on every call, with a written estimate before any work begins.
McHenry & Kane coverage
Combustion analysis included
24/7 Emergency
IL HVAC License
Illinois HVAC License
#PF1C707231CB6F1L0 ↗
On Every Call
Combustion Analysis
Google Reviews
5.0 · Verified ↗
Headquartered
Lake in the Hills, IL
Coverage
Both Counties · Same-Day
Furnace Brands We Service:
Carrier
Lennox
Trane
Goodman
Rheem
Bryant
American Standard
York
Amana
Two-County Diagnostic Patterns
Fox River B-Vent Corrosion & Western High-Efficiency Aging — Two Furnace Profiles in One Village
Algonquin's split between McHenry County (western Randall Road corridor) and Kane County (eastern Fox River neighborhoods) produces two materially different furnace service profiles separated by roughly two miles. Each side has its own dominant equipment generation, its own characteristic failure modes, and its own combustion-safety considerations.
⬅ Western Algonquin · McHenry County
Randall Road Corridor (2000–2008 Builds)
High-efficiency 90%+ AFUE equipment now 17–25 years old
- Hot-surface igniters & flame sensors dominate the service mix
- Inducer motors & pressure switches entering end-of-life
- PVC sidewall venting — vent-freeze risk on north walls
- Condensate drainage — biofilm in 15+ year traps
Subdivisions: Glenmoor, Coves of Algonquin, Stonewater, Westview Crossing, and adjacent 2000s builds along the Randall Road and Route 62 corridors.
Eastern Algonquin · Kane County ➡
Fox River Neighborhoods (Pre-2000 Builds)
Older homes with 80% AFUE atmospheric-vent retrofits
- B-vent flue corrosion accelerated by Fox River humidity
- Combustion air supply issues in retrofit installations
- Heat exchanger inspection critical on aged equipment
- Draft & venting assessment on every call
Areas: Fox River-adjacent streets, historic downtown Algonquin, neighborhoods south of Algonquin Road, and homes with proximity to flood-zone designations.
What Atmospheric Venting Looks Like After 20+ Years
Older Algonquin homes on the eastern Kane side often retain B-vent (atmospheric metal flue) on 80% AFUE retrofitted furnaces. Combined with chronic Fox River humidity, the inside surface of the flue accumulates acidic condensate during cooler shoulder-season firings — accelerating corrosion that can perforate the flue and allow combustion gases into the home.
For these homes, B-vent inspection is part of every furnace service call. A corroded flue is a serious safety issue regardless of how the furnace itself is operating.
2000s Synchronized High-Efficiency Aging
The western Randall Road subdivisions — Glenmoor, Coves of Algonquin, Stonewater, Westview Crossing — were built within roughly the same construction window, with original 90%+ AFUE high-efficiency furnaces installed during the same phase. That equipment is now 17–25 years old and entering the component-failure window in concentrated waves.
Igniters, flame sensors, pressure switches, and inducer motors from the same construction phase don't fail one at a time across decades — they fail in waves during the same winter or two of each other.
Coverage on Both Sides of the County Line
The village of Algonquin straddles the McHenry-Kane county line, and some regional HVAC contractors define their service areas county-by-county. Airwave's Illinois HVAC contractor license applies statewide — the county line is not an operational boundary for service availability, response time, or pricing.
The same diagnostic standards, same combustion analysis, and same written-estimate-first approach apply to both sides of the village without exception.
Retrofit Issues in Older Eastern Homes
Older Algonquin homes with retrofitted furnaces often have suboptimal combustion air supply — original mechanical rooms not sized for modern equipment air requirements, or air paths inadvertently sealed off by basement remodeling. Inadequate combustion air produces incomplete combustion, elevated CO output, and accelerated heat exchanger fatigue.
The diagnostic approach for retrofitted homes includes verifying adequate combustion air per manufacturer specification — sometimes the fix isn't replacing a part but restoring an air path that was blocked years ago.
Mid-Winter Sidewall Vent Freezes — Western Side
The 90%+ AFUE furnaces in western Algonquin subdivisions use sidewall PVC pipes for combustion intake and exhaust. During deep-cold periods with heavy snow, these terminations can ice over — particularly on north-facing walls. The inducer can't establish proper draft, the pressure switch never closes, and the furnace locks out with a no-heat condition.
Mid-winter vent freezes are one of the most common western-side no-heat calls, and one of the easiest to misdiagnose when a technician doesn't physically inspect the exterior terminations.
Parts for Both Furnace Generations
The two-county service profile means the service vehicle has to carry parts for both equipment generations: hot-surface igniters, flame sensors, pressure switches, and inducer motors for the western 90%+ AFUE high-efficiency wave, plus standing-pilot thermocouples, gas valves, and burner components for older atmospheric-vent 80% AFUE retrofits on the eastern side.
The practical result: most calls complete in a single visit regardless of which side of the village the home is on or which furnace generation is installed.
Local Service Mix
Furnace Repairs We See Most Often in Algonquin
Three repairs account for the majority of heating-season calls in Algonquin — though the dominant pattern shifts noticeably between the western Randall Road side and the eastern Fox River side. The full diagnostic guide for all furnace failure types is on the Furnace Repair hub page.
Most common · #1
Flame Sensor & Igniter Service — Western Subdivisions
Flame sensor fouling and hot-surface igniter failure dominate the western Algonquin service mix. The 2000s subdivision equipment population means igniters and sensors of the same vintage failing in synchronized waves — what looks like one neighborhood having a bad season is usually concentrated component end-of-life across homes built together.
Diagnosis: Signal measurement, continuity testing. Both parts stocked on the vehicle. Typical cost: Flame sensor $80–$200, igniter $150–$300, same-visit.
IgnitionSame-visitWestern side
#2
B-Vent Corrosion & Draft Issues — Eastern Side
Older Fox River-adjacent Algonquin homes with B-vent atmospheric venting on 80% AFUE equipment develop characteristic flue corrosion from chronic river humidity. Symptoms vary from CO detector alarms (most serious) to poor draft producing rollout safety lockouts to visible rust at the flue base. This is a category of failure that the western high-efficiency equipment doesn't experience at all.
Diagnosis: Visual flue inspection, draft measurement, combustion analysis. Typical cost: B-vent section replacement $200–$500; full flue replacement higher.
VentingSafetyEastern side
#3
Inducer Motor & Pressure Switch — Both Sides
High-efficiency furnaces in both western subdivisions and any newer-replacement eastern installations now see inducer motor and pressure switch failures at the 15-20 year mark. Symptoms include intermittent ignition failure, draft signal issues, or short cycling. Particularly common on equipment installed during the 2005–2010 replacement window.
Diagnosis: Inducer current-draw analysis, pressure switch continuity testing. Typical cost: Pressure switch $200–$400, inducer motor $400–$800.
High-efficiencySame-visitBoth sides
Algonquin homeowners trying to find furnace repair near them sometimes discover that contractors define service areas county-by-county. Airwave's Illinois license covers both sides — no exception. (773) 849-7379.
What We Fix Locally
Gas Furnace Repair Services in Algonquin, IL
Every Algonquin furnace repair below is performed under Airwave's Illinois HVAC contractor license, with combustion analysis and heat exchanger inspection included on every call — not as an upcharge. Same service standards apply to both the McHenry and Kane sides of the village.
Whether you're searching for furnace repair near you on the Randall Road western corridor, in Glenmoor or Stonewater, or on the eastern Fox River side, every service below applies to your address.
Combustion Analysis & Heat Exchanger Inspection
Digital combustion analyzer testing of CO, oxygen content, and combustion efficiency. Visual heat exchanger inspection on every service call — borescope used when standard visual access is restricted. Standard practice, not an add-on.
Included on every service callB-Vent Inspection & Replacement
Particularly relevant for older eastern Algonquin homes with atmospheric-vent 80% AFUE retrofits. Visual flue inspection, draft measurement, and B-vent section replacement when corrosion is identified. A safety-critical service for any home with Fox River humidity exposure.
B-vent section: $200–$500Hot-Surface Igniter & Flame Sensor
The dominant western Algonquin subdivision repair pattern. Continuity testing on igniters, signal measurement on flame sensors. Both parts stocked on the vehicle for same-visit completion across the major brands prevalent in the village.
Flame sensor: $80–$200 · Igniter: $150–$300Inducer Motor & Pressure Switch
Diagnosis and replacement for 90%+ AFUE high-efficiency furnaces. Inducer current-draw analysis, pressure switch continuity testing, verification of vent terminations and intake/exhaust hoses — particularly critical for western-side homes during mid-winter vent-freeze conditions.
Inducer: $400–$800 · Pressure switch: $200–$400Gas Valve, Burner & Thermocouple
Gas valve diagnosis, manifold pressure verification, burner cleaning, and thermocouple service on older standing-pilot systems still in operation. Particularly relevant for eastern Algonquin's older atmospheric-vent equipment where dirty burners produce inefficient combustion and elevated CO output.
Burner service: $150–$350 · Gas valve: $300–$600Control Board & Thermostat Diagnosis
Output testing and continuity verification before any board replacement. Thermostat issues eliminated first — boards are expensive and frequently misdiagnosed by less-rigorous service approaches as the cause of intermittent problems.
Thermostat: $150–$350 · Board: $350–$700Blower Motor Service — PSC & ECM
PSC and ECM blower motor diagnosis and replacement. On ECM systems, careful distinction between motor failure and module (control) failure — these require different parts and the diagnostic approach is different for each. Capacitor testing first on PSC systems.
PSC blower: $300–$650 · ECM blower: $450–$900Condensate Drain Service
High-efficiency furnace condensate line clearing, trap inspection, and auxiliary pump diagnosis. Particularly relevant for the western 90%+ AFUE equipment now 15+ years old, where biofilm in the trap is a recurring cause of furnace lockouts.
Drain service: $80–$20024/7 Emergency No-Heat Response
Mid-winter no-heat failures receive priority dispatch any hour, on both the McHenry and Kane sides of the village. Health-priority routing for Algonquin homes with cold-sensitive residents during deep-cold periods. After-hours rates stated upfront.
After-hours rates disclosed upfrontTransparent Pricing
Furnace Repair Costs in Algonquin, IL
Typical residential gas furnace repair cost ranges for Algonquin. A written itemized estimate is provided before any work begins — you approve the cost before we proceed. No surprises on the invoice.
If you're comparing furnace repair pricing near you in Algonquin, these are the same ranges Airwave quotes regardless of which side of the county line the address sits on. No travel surcharge, no zone-based pricing.
Flame sensor cleaning / replacement — most common winter call
$80 – $200
Hot-surface igniter — dominant western subdivision repair
$150 – $300
Pressure switch replacement
$200 – $400
B-vent section replacement — eastern Fox River homes
$200 – $500
Thermocouple replacement (standing-pilot systems)
$80 – $180
Vent termination thaw / clearing
$80 – $150
Condensate drain clearing
$80 – $200
Thermostat replacement
$150 – $350
Burner cleaning / service
$150 – $350
Gas valve replacement
$300 – $600
Inducer motor replacement
$400 – $800
Blower motor — PSC standard
$300 – $650
Blower motor — ECM variable-speed
$450 – $900
Control board replacement
$350 – $700
Heat exchanger replacement (vs. system replacement)
$1,200 – $2,500+
- Combustion analysis and heat exchanger inspection are included on every service call — not separate line items.
- B-vent flue inspection is performed on any atmospheric-vent system as part of standard diagnostic — particularly relevant for eastern Algonquin Fox River-area homes.
- A written estimate with itemized part and labor costs is provided before any work begins.
- After-hours rates apply to calls after 6 PM, before 8 AM, and weekends/holidays — stated upfront when you call, not added after the fact.
- When a heat exchanger crack or B-vent perforation is identified, we tell you immediately — combustion safety is non-negotiable, and replacement vs. repair numbers are presented honestly.
Available Any Hour · Both Counties
24/7 Emergency Furnace Repair in Algonquin
Mid-winter no-heat failures in northern Illinois are emergencies — particularly when indoor temperatures would drop dangerously low overnight. Airwave dispatches 24/7 throughout the heating season for Algonquin addresses on both the McHenry and Kane County sides of the village.
When you search "emergency furnace repair near me" at 11 PM during an Algonquin deep-cold period, the call goes directly to a licensed technician — regardless of which side of the McHenry/Kane line your address sits on. (773) 849-7379.
Carbon Monoxide Symptoms Are Not a Furnace Repair Call — They Are a 911 Call
If you smell exhaust gas, your CO detector is alarming, or anyone in the home has unexplained headaches, dizziness, or nausea while the furnace is running — get everyone out of the home immediately and call 911 from outside. This is particularly relevant for eastern Algonquin homes with B-vent atmospheric venting where flue corrosion can allow combustion gases into the home. After emergency services confirm it safe to re-enter, then call us for diagnosis.
Direct Line to a Licensed Technician — Any Hour
No call-center routing, no callback queue. After-hours rates are stated upfront when you call, not added afterward. Health-priority routing for Algonquin households with cold-sensitive residents during deep-cold periods.
Most emergency calls in Algonquin are reached within an hour from the Lake in the Hills home base — approximately 8 minutes' drive east on Algonquin Road.
Before We Arrive — Steps to Take Right Now
- 1If anyone has CO symptoms or the detector is alarming: evacuate immediately and call 911 from outside the home.
- 2Confirm thermostat is set to HEAT, setpoint above current room temperature, fan to AUTO.
- 3Reset the furnace power switch (usually a red toggle near the furnace) once if you suspect a lockout. Repeated lockouts mean leave it off.
- 4Check the air filter — replace it if more than 60 days old.
- 5If you have a high-efficiency furnace (western subdivisions), check exterior PVC vent terminations for snow or ice blockage and clear them if safe to reach.
- 6Move cold-sensitive household members to interior rooms with closed doors — small spaces hold residual heat longer.
How a Service Call Works
Same-Day Furnace Repair in Algonquin — From Call to Completed Repair
Four steps, one licensed technician, no hand-offs. Same process for both the McHenry and Kane sides of the village. The full technical diagnostic protocol is documented on the Furnace Repair hub.
When you search "furnace repair near me" from an Algonquin address and call Airwave, here's exactly what happens — combustion analysis included, no surprises, same process on both sides of the village.
01
Direct Call — Technical Contact
You speak directly with the licensed technician who will handle your Algonquin call — no call center, no callback queue. Equipment age and venting type confirmed during the call so the right parts and diagnostic approach are ready on arrival.
02
On-Site Diagnostic + Combustion Analysis
System operation interview, electrical measurement, combustion analysis with digital analyzer, heat exchanger inspection, and venting assessment — B-vent inspection for eastern atmospheric systems, PVC vent termination check for western high-efficiency systems.
03
Written, Itemized Estimate
Parts-and-labor cost presented in writing before any work begins. You approve the cost. No surprises on the invoice. For aged equipment with heat exchanger or B-vent concerns, both repair and replacement options are presented honestly.
04
Repair Completed Same Visit
Common parts stocked on the service vehicle — for both western high-efficiency and eastern atmospheric-vent equipment. Most Algonquin calls complete in the initial visit, and combustion verified safe before we leave.
Coverage
Airwave Covers All of Algonquin — McHenry & Kane County
Headquartered in Lake in the Hills — approximately 8 minutes east of Algonquin on Algonquin Road. No section of the village has reduced service availability or slower response times, regardless of which county the address falls in. Local knowledge of each neighborhood's housing era, equipment generation, and venting type is built into the diagnostic approach for every address.
Primary Algonquin Neighborhoods Served
- Glenmoor — Western Randall Road, 2000s high-efficiency
- Coves of Algonquin — Western subdivision, 2000–2005
- Stonewater — Western 2000s subdivision
- Westview Crossing — Western Randall Road area
- Historic downtown Algonquin — pre-2000, B-vent
- Fox River-adjacent streets — eastern Kane County
- Algonquin Road corridor — mixed-era housing
- All other Algonquin neighborhoods — both counties
From Glenmoor on the western edge to Fox River-adjacent neighborhoods on the eastern Kane side, every Algonquin address gets the same response time, same combustion analysis standard, same written-estimate-first approach.
Live in a surrounding area not listed above? Reach Airwave at (773) 849-7379 — coverage and timing for your specific address is confirmed before scheduling.
Furnace Repair Near Algonquin — Why "Near Me" Searches Land Here
Algonquin homeowners searching for furnace repair on a 4°F January evening are looking for the closest licensed technician who can be at their address quickly with the right parts and the right understanding of what's actually different about the equipment. Airwave reaches most Algonquin addresses in about 8 minutes from Lake in the Hills — closer than any large regional HVAC chain dispatching from Schaumburg, Elgin, or Arlington Heights.
The two-county geography matters more than most homeowners realize. Some regional contractors define their service areas county-by-county, leaving homeowners on one side of the village line scrambling when their preferred contractor declines the call. Airwave's Illinois HVAC contractor license applies statewide — the McHenry/Kane boundary is not an operational constraint, and the same diagnostic standards, same pricing structure, and same combustion analysis apply to both sides.
For Algonquin homeowners comparing options, the relevant question is who picks up the phone, who actually shows up, and whether combustion is verified safe before the technician leaves. Airwave's 5.0 rating across 47 verified Google reviews speaks to the outcome. The first two are answered by calling.
Licensed & Insured Furnace Repair
Licensed & Insured Furnace Repair in Algonquin
Airwave Heating and Cooling is a professional HVAC contractor headquartered in Lake in the Hills, IL — approximately 8 minutes from Algonquin. Founder and principal technician Igor Talmazan establishes the diagnostic standards every Algonquin service call follows.
Founder & Principal Technician
Igor Talmazan
HVAC Contractor & Founder · Airwave Heating and Cooling
Igor personally handles every Algonquin service call from Airwave's Lake in the Hills home base — approximately 8 minutes east on Algonquin Road. The diagnostic standards established for Algonquin furnace work reflect what makes this market genuinely different: a village split between McHenry County and Kane County, with two materially different furnace service profiles separated by roughly two miles of housing, era, and venting technology. Western Randall Road subdivisions run 2000s-era 90%+ AFUE high-efficiency furnaces with PVC sidewall venting, condensing operation, and synchronized component failure patterns. Eastern Fox River neighborhoods retain older 80% AFUE atmospheric-vent equipment where humidity-driven B-vent corrosion is a real combustion-safety concern.
Combustion analysis and heat exchanger inspection are standard on every service call, not an upcharge or a "premium" tier. For eastern Algonquin homes specifically, B-vent inspection is part of the same standard — atmospheric venting on aged equipment cannot responsibly be skipped over. The compensation structure does not change between a $150 flame sensor cleaning and a $5,200 furnace replacement, so recommendations follow what the diagnostic readings actually show.
- Illinois HVAC Contractor License — statewide, covers both McHenry and Kane counties
- Combustion analysis on every service call — not an upcharge
- Heat exchanger & B-vent inspection standard on every furnace call
- Fully insured residential HVAC operations
- Written itemized estimate before any work begins
- No commission on equipment sales — recommendations driven by the math
IL HVAC License: #PF1C707231CB6F1L0 · Direct technical contact at (773) 849-7379. Same-day scheduling is standard during the Algonquin heating season for both McHenry and Kane sides.
Fast Track Service
Schedule Furnace service in Algonquin, IL
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Other HVAC Services in Algonquin
Same licensed technician, same direct service — across all heating, cooling, and indoor air comfort needs on both sides of the village.
AC Repair
Same-day air conditioning diagnostics and repair in Algonquin. Refrigerant management for R-22, R-410A, and R-454B systems under EPA 608 certification.
AC Repair →Furnace Installation
New high-efficiency furnace sizing and installation — particularly relevant for eastern Algonquin homes replacing aged atmospheric-vent equipment with B-vent corrosion concerns.
Furnace Installation →HVAC Maintenance
Annual fall tune-ups that prevent the Algonquin furnace failures catalogued above. Combustion analysis on every visit, B-vent inspection on atmospheric-vent systems.
HVAC Maintenance →Ready to Schedule Furnace Repair in Algonquin?
Same-day service for non-emergencies, 24/7 dispatch for deep-cold no-heat failures. Both McHenry and Kane sides. Combustion analysis included on every call.
Nearby Furnace Repair Pages
Furnace Repair Near Algonquin — Adjacent McHenry County Communities
Same licensed technician, same combustion analysis standard across the area surrounding Algonquin.
Common Questions
Furnace Repair FAQ — Algonquin, IL
Honest answers to the questions Algonquin homeowners ask most about furnace repair, response timing, and what to expect on a service call.
Both sides — Airwave's Illinois HVAC contractor license applies statewide, and the McHenry/Kane boundary running through Algonquin is not an operational constraint. The same combustion analysis standard, same diagnostic protocol, and same pricing structure apply whether your address is in Glenmoor on the western Randall Road side or in the Fox River-adjacent neighborhoods on the eastern Kane County side. Some regional contractors define their service areas county-by-county — Airwave does not.
A 2005-era subdivision furnace with no airflow points most often to one of three causes. Failed blower motor — particularly common on ECM-equipped systems where the motor or its control module has reached end-of-life. Tripped high-limit switch from restricted airflow (clogged filter, blocked return) which shuts the burners and stops the blower for safety. Failed blower capacitor on PSC systems — a cheap fix masquerading as a major motor failure. The diagnostic sequence: filter check first (free), then capacitor test on PSC systems, then motor and control board on ECM systems. Most are same-visit repairs once the actual cause is identified.
If your home has an 80% AFUE atmospheric-vent furnace — common in older eastern Algonquin homes — then yes, this is worth taking seriously. Chronic Fox River humidity drives condensation on the inside surface of the B-vent flue, and that condensate is mildly acidic. Over 20+ years of service, it accelerates corrosion that can perforate the flue and allow combustion gases (including CO) into the home. The risk is real but the inspection is straightforward — visual examination of the flue from above and at the connection points, plus combustion analysis to detect any abnormal CO output. We perform B-vent inspection as part of every service call on atmospheric-vent systems, not as an upcharge. If perforation is identified, the section can usually be replaced for $200–$500.
ECM (electronically commutated motor) blower systems have two components that can fail independently — the motor itself and the control module that drives it. They look like one part but they're separate, and the diagnostic distinction matters because the parts and repair costs differ substantially. Motor failure — the motor doesn't spin or spins erratically; bearings have failed, windings have shorted. Module failure — the motor is mechanically fine but receives no proper signal from the failed electronics; the module needs to be replaced or sometimes the entire motor-module assembly. Module-only replacement is typically $250–$400; full motor-module assembly $450–$900. Diagnostic involves testing the module output to the motor to determine which component actually failed.
Most Algonquin furnace repair calls fall in the $80–$500 range. The most common: flame sensor cleaning or replacement $80–$200, hot-surface igniter replacement $150–$300 (dominant on western 2000s subdivisions), pressure switch $200–$400, and B-vent section replacement $200–$500 (more common on eastern Fox River homes). Larger repairs (inducer motor, blower motor, control board) range $400–$900. Pricing is the same on both sides of the village — no zone-based pricing, no travel surcharge. See the full pricing table above.
Same-day service is standard in Algonquin during heating season — on both the McHenry and Kane sides of the village. From Airwave's Lake in the Hills home base — approximately 8 minutes east on Algonquin Road — most non-emergency calls are completed the same day they're scheduled. If you're searching "furnace repair near me" from an Algonquin address, you get a technician who already knows the local equipment patterns: western synchronized high-efficiency aging on one side, eastern B-vent corrosion concerns on the other. Call (773) 849-7379 for direct technical contact. Coverage and timing are confirmed before scheduling.
The blower is running but heat isn't being delivered — several likely causes that depend on which side of the village the home is on. Western subdivisions (high-efficiency): flame sensor fouling cutting the burner cycle short, hot-surface igniter degradation preventing reliable ignition, or a pressure switch issue on the inducer. Eastern older homes (atmospheric-vent): thermocouple failure on standing-pilot systems, dirty pilot or main burners, or a draft issue from a corroded B-vent restricting flue gas movement. Quick checks: thermostat fan to AUTO not ON, gas valve at the furnace open, air filter replaced if older than 60 days. Persistent cool-air operation needs diagnosis — most are same-visit repairs.
Last reviewed: June 2026 · EPA 608 refrigerant phase-out dates, repair pricing ranges, and IL HVAC licensing verified current.