Furnace Repair in Issaquah, WA
Gas, electric and oil furnace repair across Issaquah from our Redmond team: fees listed up front and a written price before work starts.
Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer
Furnace repair in Issaquah, explained
Home Comfort Alliance repairs gas, electric and oil furnaces across Issaquah, WA, and gives you an upfront price before any work begins. Every repair visit has a $119 dispatch fee and a $72 standard diagnostic, shown as separate lines, and you decide on the written repair price before a part is touched.
Our Redmond team covers Issaquah, in the valley and up on the plateau and hillsides. Call (425) 645-0404; our phones are answered and bookings are accepted 24/7.
Gas odor? Get out of the house, leave light switches alone, and call PSE at 1-888-225-5773 or 911 from outside (PSE gas leak steps). PSE supplies both gas and electricity in Issaquah.
Five checks before you call
- Thermostat: HEAT mode, a setting above room temperature, and fresh batteries.
- Breaker and furnace switch: both on. The switch is often mounted on the side of the furnace or on a nearby wall.
- Filter: a clogged filter starves the furnace of air and can trip it off.
- Furnace door: seated firmly, or the door switch keeps the furnace off.
- Gas smell: if there is any, stop here, leave and call PSE or 911.
The full walk-through is in our furnace won't turn on guide.
Signs your furnace needs repair
- The burners light but little or no air comes out of the registers.
- Air from the vents is cool during a heating cycle.
- Clicking at startup and no flame, then a lockout.
- The furnace short cycles: on, off, on again within minutes.
- A humming, squealing or grinding blower.
- A burning or electrical smell.
- Water pooling around a high-efficiency furnace.
Common furnace repairs in Issaquah homes
| Component | Symptoms | Notes |
|---|---|---|
| Blower motor and capacitor | Burners light, little or no airflow, overheating | A failed blower motor is one of the bigger repairs; we price it before any work. |
| Ignitor | Clicks, no flame | Ignitor replacement runs $353 to $821. |
| Flame sensor | Lights, then shuts off after a few seconds | Often cleaned, sometimes replaced. |
| Pressure switch and inducer | Draft fan runs, no ignition | Often a venting or drain issue, not the switch itself. |
| Limit switch | Cycles off on overheating | We fix the airflow cause, not just the switch. |
| Condensate drain | Water on the floor, lockout | Common on high-efficiency furnaces. |
| Thermostat | Blank screen or no call for heat | Replacement runs $299 to $1,840. |
In larger hillside homes, long duct runs to upstairs rooms are common, so a weak blower often shows up there first. If one floor is cold while the furnace runs, mention it when you book.
How a repair visit works
- Book online or by phone and pick an arrival window.
- A NATE-certified technician arrives with a stocked truck.
- We read the control board, watch a full heating cycle and test the blower, ignition, gas pressure and safety switches.
- We check for carbon monoxide on every gas call.
- You receive a written repair price. Our trucks are fully stocked, so most repairs can be handled on the spot.
- We run the furnace through heat and fan cycles before we leave.
Hours and after-hours help
Our phones are answered and bookings are accepted 24/7. Heating and cooling technicians work during business hours and are available after hours for qualifying emergencies ($330 after-hours fee), such as no heat in cold weather or a burning or electrical smell. Regular visits are Monday to Friday, 8 AM to 5 PM, with same-day service when possible.
A frozen pipe is a plumbing problem, not a heating emergency; our plumbers work Monday to Friday, 8 AM to 5 PM, and you can book with them by phone or online.
Furnace repair prices in Issaquah
You see our fees before we arrive. The dispatch fee and diagnostic are separate lines; after diagnosis you get the repair price in writing.
| Home Comfort Alliance item | Price |
|---|---|
| Dispatch (trip) fee | $119 |
| Standard diagnostic | $72 |
| Deeper diagnostic | $130 |
| After-hours fee (qualifying emergencies) | $330 |
| Ignitor replacement | $353 to $821 |
| Thermostat replacement | $299 to $1,840 |
| Furnace tune-up | $230 ($180 Club) |
| Oil furnace tune-up | $336 ($288 Club) |
Prices as of October 2026. The standard and deeper diagnostics are one or the other, never both.
Seattle benchmark, not our price: Angi lists furnace repair at $139 to $544, with an average of $341 (August 2026) (Angi furnace repair costs). See our furnace repair cost guide for parts.
This season: $50 Off Emergency No Heat Calls, or $50 off HVAC service or repair (special offers; not combined with Club pricing). Financing through Salal Credit Union or Synchrony starts at $179/month* (financing).
*Financing through Salal Credit Union or Synchrony, subject to credit approval. Rates, terms and monthly payments depend on the amount financed, the plan and your credit. 0% interest options are available to qualifying customers. See lender for full terms.
Get an estimateA written, upfront price before any work begins.
Repair or replace?
A big repair on an old furnace is the moment to compare. A failed blower motor, a control board and a heat exchanger crack are the repairs that most often tip the decision. The $5,000 rule (furnace age times the repair price) is a simple starting point; a furnace past 20 years facing a large repair is usually a replacement candidate.
Replacement estimates are free, and our instant HVAC quote gives a price range in about 30 seconds. We size every new system with a room-by-room load calculation (ACCA Manual J), and most furnace installations take between 4 and 10 hours. What you get with a replacement: a 3-year Comfort Shield labor warranty on new installations, kept active with yearly maintenance. First-year maintenance is included.
Issaquah is an Energy Smart Eastside city: if you replace a furnace with a qualifying Mitsubishi, Bryant/Carrier or Day & Night heat pump inside city limits, a network contractor applies a $1,000 instant rebate at the point of sale, with a $5,000 bonus for fully electric systems in households below 150% of King County median income (Energy Smart Eastside, read October 2026). PSE adds options such as $1,500 for a hybrid heat pump. See furnace replacement in Issaquah and heat pumps in Issaquah.
Dual fuel systems
If a heat pump does most of your heating and the gas furnace takes over in the cold, both halves need to work and hand off properly. This page covers the furnace side; for the heat pump, see heat pump repair in Issaquah.
Permits and utilities in Issaquah
Puget Sound Energy supplies natural gas and electricity in Issaquah. A like-for-like part repair normally needs no permit, but Issaquah's code also covers mechanical repairs, so we check with the Permit Center when a repair changes the system. Replacing a furnace inside city limits needs a City of Issaquah permit, applied for through MyBuildingPermit; the Permit Center is at 425-837-3100 (Issaquah permits), and residential outdoor HVAC equipment goes through plan review (Issaquah mechanical permits).
Not every Issaquah address is the City of Issaquah. The city notes that Klahanie and Mirrormont are outside its jurisdiction: Klahanie permits go through the City of Sammamish, and Mirrormont through King County Permitting (206-296-6600). Electrical permits come from Washington L&I. We pull the required permits for every installation.
A recent Issaquah furnace repair call: a failed blower motor
In late September an Issaquah homeowner in 98027 called with no heat from a Carrier furnace. Our technician diagnosed the problem as a failed blower motor: the furnace could not move air through the house.
Because a blower motor is one of the larger furnace repairs, he gave the homeowner both paths in writing: the price to replace the motor, and a quote for a new furnace. That is how we handle every bigger repair, so the decision is yours with the numbers in front of you.
From our September 2026 service records; customer details are kept private.
Why Issaquah homeowners call us
- TrustAnalytica Top 10 HVAC Contractor 2026 (Redmond).
- Lennox Centurion Award 2024 and 2025; Lennox Premier Dealer, Carrier Factory Authorized Dealer and Mitsubishi Electric Diamond Dealer.
- NATE-certified technicians; written prices before any work.
- Licensed, bonded and insured in Washington: WA Contractor Reg. #HOMECCA785BD and WA Electrical Contractor Lic. #HOMECCA782DC.
- BBB Accredited Business since 2002, ACCA member, Best Pick 2025 and 2026.
- Home Comfort Club from $15 a month (membership plans).
- Locally owned since 1977.
Issaquah furnace repair FAQ
How much does furnace repair cost in Issaquah?
Repair visits carry a $119 dispatch (trip) fee. Diagnosis is $72 for a standard diagnostic or $130 for a deeper diagnostic, and after-hours visits for qualifying emergencies carry a $330 after-hours fee. You get an upfront price for the repair before any work begins. As an example, ignitor replacement runs $353 to $821. For context, Angi lists Seattle-area furnace repairs at $139 to $544 (Aug 2026); that is not our price.
Why is my furnace blowing cold air?
Common causes are a dirty flame sensor, a failed ignitor, a clogged filter that trips the high-limit switch, a blocked condensate drain on a high-efficiency furnace, or a thermostat set to ON instead of AUTO. Check the thermostat and filter first, then call us for a diagnostic.
My furnace clicks but will not light. What does that mean?
The furnace is trying to start but something in the ignition sequence is failing, often the ignitor, flame sensor, pressure switch or inducer motor. Repeated attempts can lock the furnace out. Turn it off at the thermostat and book a repair.
The furnace runs but no air comes out. What is wrong?
If the burners light but little or no air moves, the blower is the first suspect: a failed blower motor, a weak capacitor or a loose wheel. Running the furnace that way can overheat it, so switch it off and book a repair.
What should I do if I smell gas?
Leave the home right away, do not touch light switches, and call PSE at 1-888-225-5773 or 911 from outside. Once the gas utility says it is safe, call us to repair the furnace.
Can you come today or after hours?
Same-day service when possible. Our phones are answered and bookings are accepted 24/7. Heating and cooling technicians work during business hours and are available after hours for qualifying emergencies ($330 after-hours fee), such as no heat in cold weather or a burning or electrical smell.
Do you serve all of Issaquah?
Yes. Our Redmond team repairs furnaces across Issaquah, in ZIP codes 98027 and 98029, including homes just outside city limits. Redmond is a service location, so we come to you.
Do I need a permit to repair my furnace in Issaquah?
A like-for-like part repair normally needs no permit, but Issaquah's code also covers mechanical repairs, so we check with the Permit Center when a repair changes the system. Replacing a furnace inside city limits needs a permit from the City of Issaquah; homes in Klahanie go through the City of Sammamish and homes in unincorporated areas such as Mirrormont go through King County. We pull the required permits for every installation.
Is it worth replacing a 30-year-old furnace?
Usually, yes, if it needs a significant repair. A furnace that old is past its expected life and far less efficient than current models. We will still price the repair so you can compare, and replacement estimates are free.
Are there rebates for furnace repair in Issaquah?
No. PSE does not offer furnace, repair or maintenance rebates. If you replace the furnace with a qualifying heat pump, Energy Smart Eastside offers a $1,000 instant rebate through network contractors, applied at the point of sale, and PSE has heat pump rebates such as $1,500 for a hybrid system. We are an approved Energy Smart Eastside contractor and a PSE Trade Ally.
What brands do you repair?
We service all major brands of gas, electric and oil furnaces. We are a Lennox Premier Dealer, Carrier Factory Authorized Dealer and Mitsubishi Electric Diamond Dealer, and our technicians are NATE-certified.
Is Home Comfort Alliance licensed?
Yes. WA Contractor Reg. #HOMECCA785BD and WA Electrical Contractor Lic. #HOMECCA782DC. We are licensed, bonded and insured in Washington, BBB Accredited since 2002, and locally owned since 1977.
Sources (checked October 22, 2026): City of Issaquah, permits; City of Issaquah, mechanical permits; Energy Smart Eastside, rebates; PSE, detect a gas leak; Angi, Seattle furnace repair cost (Aug 2026).
Why Choose Home Comfort Alliance in Issaquah?
Your Comfort is Our Promise
We promise...
Reliable heating, air conditioning, plumbing and electrical service, all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Book a furnace repair in Issaquah
Tell us what the furnace is doing. A heating technician from our Redmond team will find the fault and give you a written, upfront price before any work begins.
Request furnace repair
We will call you to set up the visit. For no heat after hours, call (425) 645-0404.