Furnace Repair in Seattle-Tacoma
Gas and electric furnace repair with upfront pricing, from NATE-certified technicians. Phones answered 24/7.
- Serving Puget Sound homeowners since 1977
- 4.8 stars from 5,000+ reviews
- Licensed, bonded and insured in Washington
- WA Contractor Reg. #HOMECCA785BD
- NATE-certified technicians
- 24/7 emergency service
Furnace repair for Seattle-Tacoma homes
Home Comfort Alliance repairs gas and electric furnaces for homeowners across the Seattle-Tacoma area and the wider Puget Sound region. A NATE-certified technician finds the cause, gives you an upfront price before any work begins, and fixes the furnace or tells you plainly if replacement makes more sense. We service all major brands, and our phones are answered 24/7.
Smell gas or hear a carbon monoxide alarm? Leave the home now and call 911 or your gas utility from outside: PSE at 1-888-225-5773 or Cascade Natural Gas at 888-522-1130. Don't flip switches or use a landline inside. For no heat on a cold night, see emergency furnace repair.
Signs your furnace needs repair
Call for furnace repair when the furnace stops heating, heats unevenly, cycles on and off, or makes new noises or smells. The most common warning signs are:
- No heat, or cold air from the vents when the thermostat calls for heat.
- The furnace turns on and off every few minutes (short cycling).
- Banging, squealing, rattling or a loud boom when it lights.
- A burning smell that lasts more than the first few minutes of the season, or any rotten egg smell (gas: leave and call from outside).
- A yellow or flickering burner flame on a gas furnace instead of steady blue.
- Rising energy bills or rooms that never get warm.
- The breaker trips when an electric furnace runs.
More detail: signs your furnace is about to fail and furnace smells: normal vs dangerous.
What to check before you call
Five quick checks fix a surprising share of no-heat calls and take about ten minutes. Do only these; leave gas valves, burners and wiring to a technician.
- Thermostat: set to HEAT, a few degrees above room temperature, fan on AUTO; replace the batteries if the screen is blank.
- Power: check the furnace breaker and the light-style switch on or near the furnace.
- Filter: a clogged filter makes the furnace overheat and shut itself off. Replace it (see how often to change a furnace filter).
- Furnace door: the front panel must be fully closed or a safety switch keeps the furnace off.
- Vents: on high-efficiency gas furnaces, make sure the white plastic pipes outside are clear of snow, leaves or nests.
If the furnace still won't heat, call us. Don't keep resetting it; repeated restarts can hide a safety fault.
Gas vs electric furnace repair
Gas and electric furnaces fail in different places, so the repair depends on which one you have. Angi notes that close to 60% of Seattle homeowners heat with electric furnaces, so both are common here.
If your furnace is gas, the usual culprits are the ignitor, flame sensor, draft inducer motor, pressure switch, gas valve or control board. Gas furnaces also need their venting and heat exchanger checked, because a crack can leak carbon monoxide.
If your furnace is electric, the usual culprits are heating elements, sequencers or relays, the blower motor, the transformer and tripped or failing breakers. See gas vs electric furnaces for how they differ.
What does furnace repair cost in the Seattle area?
Most Seattle furnace repairs cost $139 to $544, and the average is $341, according to Angi's Seattle data (regional estimate, August 2026). Simple parts like a flame sensor or ignitor sit at the low end; motors, control boards and heat exchangers cost more. Updated October 2026.
| Repair | Seattle cost range (Angi, Aug 2026) |
|---|---|
| Flame sensor | $160 to $270 |
| Ignitor | $160 to $540 |
| Thermostat | $110 to $650 |
| Circuit (control) board | $220 to $650 |
| Gas valve | $220 to $650 |
| Draft inducer motor | $220 to $1,620 |
| Blower motor | $160 to $2,160 |
| Heat exchanger | $110 to $1,620 |
Source: Angi, Seattle furnace repair cost (Aug 2026). These are regional estimates, not Home Comfort Alliance prices.
Home Comfort Alliance service prices
| Item | Price |
|---|---|
| Dispatch (trip) fee | $119 |
| Standard diagnostic fee | $72 |
| Deeper diagnostic fee | $130 |
| After-hours fee | $330 |
| Ignitor replacement | $353 to $821 |
| Thermostat replacement | $299 to $1,840 |
| Furnace tune-up | $230 ($180 for Home Comfort Club members) |
Prices as of September 2026. Fees are listed separately.
You approve an upfront, written price before any repair begins. Current offer: $50 off HVAC service or repair (see special offers). Bigger repairs can be financed through Salal Credit Union or Synchrony, with plans starting at $179/month* and 0% interest options for qualifying customers (financing).
Repairs don't qualify for utility rebates, and the federal 25C tax credit ended for equipment placed in service after December 31, 2025. If you end up replacing, utility rebates go mainly to heat pumps; see the heat pump cost and rebate guide.
*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.
Repair or replace your furnace?
Repair is usually the right call when the furnace is under about 15 years old, the repair is a small share of a new system, and it has been reliable. Replacement starts to make sense when:
- The furnace is 15 to 20 years old or more (a typical furnace life in the Pacific Northwest).
- The furnace age times the repair cost is over $5,000 (the "$5,000 rule").
- The heat exchanger is cracked, which can leak carbon monoxide.
- You are paying for repairs every season, or bills keep climbing.
Our technicians will tell you which way they would go and why. If replacement wins, see furnace replacement, HVAC replacement or heat pump installation, and get a price range in about 30 seconds with our instant quote tool. The full guide: furnace repair vs replacement.
How our furnace repair works
- Call or request a visit. Our phones are answered 24/7, with same-day and after-hours service across our service area.
- Diagnosis. A NATE-certified technician tests the furnace, its safety controls and its venting to find the cause, not just the symptom.
- Upfront price. You get the price before any work begins, plus a straight answer on repair vs replace.
- Repair. We fix the furnace on all major brands, gas or electric.
- Test. We run the furnace through a full heating cycle and walk you through what we found.
What you get with Home Comfort Alliance
- Upfront, transparent pricing before any work begins.
- NATE-certified technicians who service all major furnace brands.
- 24/7 emergency service; our phones are answered around the clock.
- Home Comfort Club members get priority scheduling, discounted repair rates and extended labor coverage on repairs, up to 5 years from installation (membership plans from $15 a month).
- Licensed, bonded and insured in Washington; BBB Accredited Business since 2002.
Where we repair furnaces
Home Comfort Alliance repairs furnaces across the Puget Sound region from four offices: Redmond, Everett, Bremerton and Sumner. Local furnace repair pages: Tacoma, Puyallup, Sumner and Bremerton. Find your city on our service areas page, including Seattle, Redmond and Everett.
Furnace repair FAQ
How much does furnace repair cost in Seattle?
Angi puts the average Seattle furnace repair at $341, with most repairs between $139 and $544 (regional estimate, August 2026). Small fixes such as a flame sensor sit at the low end; a blower motor, inducer motor or heat exchanger can pass $1,500. Home Comfort Alliance charges a $119 dispatch fee and a $72 standard diagnostic fee, and you approve an upfront price before any repair starts.
What are the most common furnace repairs?
The most common furnace repairs are a failed ignitor or dirty flame sensor, a bad blower or draft inducer motor, a faulty control board, pressure switch or limit switch, a clogged filter causing overheating shutdowns, and thermostat problems. Gas furnaces add ignition and gas valve parts; electric furnaces add heating elements, sequencers and breakers.
Is it worth repairing an old furnace?
Usually yes when the furnace is under about 15 years old and the repair is a fraction of a new system. Use the $5,000 rule as a rough guide: multiply the furnace age by the repair cost, and if the result is over $5,000, get a replacement quote too. A cracked heat exchanger on an older furnace is almost always a replace.
Should a 25-year-old furnace be replaced?
Usually, yes. A 25-year-old furnace is well past a typical 15 to 20 year life, is far less efficient than a new model, and parts get harder to find. Repair it if the fix is small and you need heat now, then plan the replacement on your schedule.
Why is my furnace blowing cold air?
A furnace blowing cold air most often has the thermostat fan set to ON instead of AUTO, a clogged filter that tripped the overheat limit, a failed ignitor or flame sensor, or a gas supply problem. Check the thermostat and filter first; if it still blows cold, call for a diagnosis.
Why does my furnace keep turning off?
Short cycling usually comes from a dirty filter causing overheating, a dirty flame sensor, a blocked vent or intake, or an oversized furnace. Replace the filter first; if it keeps shutting off, a technician should check the flame sensor, limit switch and venting.
Do you repair all furnace brands?
Yes. Home Comfort Alliance services all major furnace brands, gas and electric. We are also a Carrier Factory Authorized Dealer and a Mitsubishi Electric Diamond Dealer for new equipment.
Is there a charge for a furnace repair visit?
Yes. Service and repair visits carry a $119 dispatch fee, and diagnosis is a $72 standard or $130 deeper diagnostic fee, listed separately. After-hours visits carry a $330 after-hours fee. You see and approve the repair price before we start.
Do I need a permit for furnace repair in Washington?
Most like-for-like furnace part repairs do not need a permit. Replacing the furnace does: it needs a mechanical permit from your city or county, plus an electrical permit where wiring changes. Home Comfort Alliance pulls the required permits for every installation.
Sources: Angi (Seattle furnace repair cost data, August 2026), PSE and Cascade Natural Gas (gas leak guidance), IRS (25C credit), all checked October 2026.
Why Choose Home Comfort Alliance for Furnace Repair?
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 every visit, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.
Get your furnace fixed
Tell us what your furnace is doing and a comfort advisor will set up a repair visit. Our phones are answered 24/7.
Get an estimate
A local comfort advisor will call you to set up your visit.