Locally-owned since 1977 • Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD) • WA Electrical Contractor Lic. #HOMECCA782DC • NATE-certified technicians • Carrier Factory Authorized Dealer • Mitsubishi Electric Diamond Dealer • Lennox Premier Dealer
Furnace repair in SeaTac: the short answer
North or south of S 160th Street, SeaTac homes get furnace repair from our Redmond branch, for gas, electric, oil and propane units. The repair visit carries a $119 dispatch fee. Diagnostics show up on their own line at $72 standard or $130 deeper, and you approve an upfront price before anything is done. Before leaving after any gas repair, we run a carbon monoxide check. After hours, qualifying emergencies have a $330 after-hours dispatch fee instead of the $119.
Our trucks are fully stocked, so most repairs can be handled on the spot. See furnace repair for how the service works everywhere we go, or heat pump repair in SeaTac if a heat pump heats your home.
Gas smell in your SeaTac home? Get everyone outside before anything else. From outside, dial 911, then Puget Sound Energy, the natural gas supplier for SeaTac, at 1-888-225-5773. Once you are safe, call us. (PSE natural gas safety; what to do if you smell gas.)
Why SeaTac furnaces work hard in winter
A lot of SeaTac's homes are postwar ramblers and split-levels, some with the furnace in a crawlspace or garage and ductwork that has been in place for decades. Homes near the airport often stay closed up against the noise, so the furnace runs longer and the filter loads up faster than it would in a house that gets aired out.
Plenty of SeaTac households rent, including duplexes. If you are a tenant paying for the repair, you can book it. If the landlord pays, give us their details and we will call them.
Furnace problems we fix in SeaTac homes
| Symptom | Usually means | What to do now |
|---|---|---|
| A carbon monoxide alarm is sounding | A combustion or venting problem | Get outside, then phone 911 and PSE |
| The furnace runs but the house never warms up | Clogged filter, duct leaks, a failing blower or a burner problem | Change the filter; book a visit if it continues |
| No heat and the furnace won't light | Ignitor, flame sensor or gas valve | Switch it off and schedule repair |
| Cold air from the vents | Ignition lockout or a tripped high limit | Check the filter and thermostat, then call |
| Starts and stops every few minutes | Flame sensor, overheating or a thermostat fault | Book a visit |
| Banging or squealing | Delayed ignition or a blower problem | Switch it off and schedule repair |
Gas furnaces
Ignitors, flame sensors, draft inducers, pressure switches, gas valves, control boards, limit switches, condensate drains on high-efficiency units, and venting.
Hybrid systems
Some SeaTac homes pair a heat pump with a gas furnace that takes over on cold nights. A furnace fault can look like a heat pump problem, and the other way around. We repair both halves (heat pump repair in SeaTac).
Electric, oil and propane furnaces
Elements, sequencers and blower motors on electric furnaces; nozzles, filters and cad cells on oil furnaces; and propane furnace repairs.
Signs your SeaTac furnace needs a repair
- No heat, or rooms that stay cold
- Cool air when the heat is on
- The furnace cycles on and off or never shuts off
- New noises, or a smell that doesn't fade after the first cold day
- Higher gas or electric bills with no change in use
Easy checks first
- Fresh thermostat batteries, set to HEAT, set above the current room temperature.
- Furnace switch and breaker on.
- Filter: homes kept closed up for airport noise need it changed more often.
- Furnace door panel closed tight.
- Other gas appliances working, if you heat with gas.
If the heat still won't come on, book a visit, and don't keep resetting the furnace.
SeaTac furnace repair prices
| Service | Price |
|---|---|
| Dispatch fee (repair visit) | $119 |
| Standard diagnostic | $72 |
| Deeper diagnostic | $130 |
| After-hours dispatch, qualifying emergencies | $330, instead of the $119 |
| Furnace ignitor replacement | $353 to $821 |
| Thermostat replacement | $299 to $1,840 |
| Furnace tune-up | $230, or $180 for Home Comfort Club members |
| Oil furnace tune-up | $336, or $288 for members |
Prices as of November 2026. Dispatch and diagnostic fees are listed separately and are not added together into one price. More detail: what furnace repairs cost.
You decide on the repair after the technician quotes an upfront price, and nothing is changed until you agree. Note that a tune-up leaves out a carbon monoxide test and a heat exchanger inspection (furnace maintenance).
Regional estimate, not our price: per Angi, the average Seattle-area furnace repair is $341, and most homeowners spend $139 to $544 (Angi, updated Aug 2026, read Nov 2026).
Our current deal takes $50 off HVAC service or repair (special offers). With the $30 a month Home Comfort Club, repairs are 10% off. That discount does not apply to dispatch fees, diagnostic time or after-hours charges, and it cannot be combined with other offers.
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 comfort advisor will call you to set up your visit.
SeaTac furnace out after business hours?
Our heating technicians work during business hours and are available after hours for qualifying HVAC emergencies, such as no heat in cold weather or a furnace giving off burning or electrical smells. After hours, qualifying emergencies have a $330 after-hours dispatch fee instead of the $119, on weekends too, except holidays when we are closed (after-hours furnace repair).
Should you fix or replace a SeaTac furnace?
A furnace with one failed part and plenty of life left is usually worth repairing. Start pricing a replacement when the furnace is older, the same problems keep returning, or one repair costs a large share of a new system. Our technician gives you both options with upfront prices, and replacement estimates are free.
See furnace replacement in SeaTac, or, if you are thinking about adding a heat pump to your gas furnace, our SeaTac heat pump installation page covers options and rebates. Repairs do not get utility rebates.
SeaTac gas, electricity and permit notes
| Need | Who | Contact |
|---|---|---|
| Natural gas, and gas leaks | Puget Sound Energy | 1-888-225-5773 |
| Power north of S 160th Street | Seattle City Light | (206) 684-3000 |
| Power south of S 160th Street | Puget Sound Energy | 1-888-225-5773 |
| Mechanical and electrical permits | City of SeaTac (it issues its own electrical permits) | seatacwa.gov |
Nearly every repair just replaces a failed part on the existing furnace. A new furnace needs permits, and we pull the required permits on every installation. Should a repair need one, you hear about it before work begins (City of SeaTac utilities; City of SeaTac permit center; L&I city electrical permits).
Your SeaTac furnace visit, step by step
- Book by phone at (425) 645-0404 or online. Tell us the furnace type, its age and what it is doing.
- Your NATE-certified technician comes from Redmond with a parts-stocked truck ($119 dispatch).
- The diagnostic, $72 standard or $130 deeper, tracks down the problem.
- You see the repair price before any work begins.
- Most repairs are done on the spot.
- On gas furnaces we finish with a carbon monoxide check and watch a full heating cycle.
A recent SeaTac furnace repair
In May 2026 a SeaTac homeowner's gas furnace would not ignite. Our technician tested the gas valve and found its coils open, so the valve could not open to let gas to the burners. We installed a new gas valve the next day, and the furnace lit and ran normally again.
SeaTac neighborhoods we cover
Our furnace techs cover Angle Lake, Bow Lake, McMicken Heights and Riverton Heights, on both sides of S 160th Street, ZIP codes 98168, 98188 and 98198.
Nearby: heating in Des Moines, plus Burien, Tukwila and Renton. More about the city: Home Comfort Alliance in SeaTac.
Why SeaTac households trust us with furnace repair
- Fees you can see ahead of time: $119 dispatch, $72 or $130 diagnostic, upfront repair price
- Every gas repair finishes with a carbon monoxide check
- Carrier Factory Authorized Dealer and Lennox Premier Dealer, and we service all major brands
- NATE-certified technicians from our Redmond branch
- Licensed, bonded and insured in Washington (WA Contractor Reg. #HOMECCA785BD; WA Electrical Contractor Lic. #HOMECCA782DC)
- BBB Accredited Business since 2002; Best Pick Reports Best Pick 2025 and 2026
- Locally owned since 1977
SeaTac furnace repair FAQ
Which company repairs furnaces in SeaTac?
Call Home Comfort Alliance at (425) 645-0404. Our Redmond-branch technicians repair gas, electric, oil and propane furnaces across SeaTac, north and south of S 160th Street. Our phones are answered and bookings are accepted 24/7.
What is the cost of a SeaTac furnace repair visit?
The dispatch fee is $119. Diagnostics cost $72 for standard or $130 for deeper. Before work begins, you get an upfront price. As one example, ignitor replacement runs $353 to $821.
Can you fix my furnace tonight or this weekend?
For qualifying heating emergencies, such as no heat in cold weather, yes. After hours, qualifying emergencies have a $330 after-hours dispatch fee instead of the $119, on weekends too, except holidays when we are closed.
Who supplies gas in SeaTac, and what if I smell gas?
In SeaTac, natural gas comes from Puget Sound Energy. If you notice a gas smell, get out of the house first. From outside, call 911 and then Puget Sound Energy at 1-888-225-5773. Contact us once you are safe.
Do you check for carbon monoxide during a repair?
Yes. Before we leave, every gas repair gets a carbon monoxide check. A tune-up, by contrast, does not include a carbon monoxide test or a heat exchanger inspection.
My house stays closed up because of airport noise. Does that affect my furnace?
A closed-up house leans on the furnace and its filter more, so check the filter often and book a tune-up each year. A furnace tune-up is $230, or $180 for Home Comfort Club members.
Do I need a permit for a furnace repair in SeaTac?
Usually a repair just replaces a failed part on your existing furnace. A new furnace needs City of SeaTac permits, and we pull the required permits on every installation. If your repair needs a permit, we will tell you before starting.
I rent in SeaTac. Can I book a furnace repair?
Tenants who pay for the repair can book it directly. If your landlord pays, send us their details and we will call.
Sources: PSE natural gas safety; City of SeaTac utilities; City of SeaTac permit center; L&I city electrical permits; Angi, Seattle furnace repair cost; all read November 2026.
More SeaTac services
Why Choose Home Comfort Alliance in SeaTac?
Your Comfort is Our 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.
Schedule SeaTac furnace repair
Tell us what your furnace is doing and our Redmond branch will schedule your visit.
Get an estimate
We will call you to set up the visit.