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
SeaTac heat pump not heating? Start here
Our Redmond branch sends technicians to SeaTac for three kinds of systems: ducted heat pumps, ductless mini-splits, and hybrid setups that pair a heat pump with a gas furnace. The dispatch fee for a repair visit is $119. Diagnostics are separate: $72 for a standard diagnostic or $130 for a deeper one. Before we touch anything, you see an upfront price. After hours, a heat pump that has stopped heating counts as a qualifying emergency, and the dispatch fee is $330 instead of the $119.
Gas furnace instead? Go to furnace repair in SeaTac. Our general approach is on the heat pump repair page.
What we fix on SeaTac heat pumps
Hybrid systems: heat pump plus gas furnace
When a hybrid system misbehaves, the problem can sit in the heat pump, the furnace or the controls that decide when one hands off to the other. We check the changeover setup and thermostat, repair either side, and end every gas repair with a carbon monoxide check.
Ducted heat pumps
Refrigerant leaks, reversing valves, defrost boards and their sensors, backup heat strips, fan motors, contactors and capacitors. Per the U.S. Department of Energy, a refrigeration system ought to be leak-checked when it goes in and again on every service call (energy.gov). Any circuit we work on gets that check.
Ductless mini-splits
Blinking error lights, clogged drains, dirty coils and blower wheels, plus leaks in the line set. All major brands get serviced, and we hold Mitsubishi Electric Diamond Dealer, Carrier Factory Authorized Dealer and Lennox Premier Dealer status (mini-split repair). Since each truck carries a full stock, the fix often happens during the first visit.
Defrost, ice or a repair?
Frost on the outdoor coil on a cold, wet morning is expected. The heat pump clears it with a defrost cycle that takes a few minutes, often with a puff of steam. Open lots and wind near the airport can upset defrost: the Department of Energy notes that high winds can cause defrosting problems.
| Sign | What it means | Next step |
|---|---|---|
| Frost that clears within a few minutes | Normal defrost | Nothing to do |
| Ice that builds back or never clears | Defrost, airflow or refrigerant fault | Shut it off, then schedule a repair |
| Fan stopped, unit humming | Capacitor or fan motor | Switch the unit off and schedule us |
| Cool air in heat mode on a mild day | Thermostat setup, low charge or a changeover fault on a hybrid system | Book a visit |
Not sure if it is just defrost? Read frozen heat pump or normal defrost.
Aux heat and your electric bill
When a heat pump struggles, backup electric heat carries the load, and it costs more to run. North of S 160th Street that shows up on a Seattle City Light bill; south of it, on a PSE bill. On a hybrid system the gas furnace takes over instead, so a heat pump problem can hide behind a higher gas bill. If AUX or EM HEAT stays on through mild weather, book a repair visit.
Quick checks for SeaTac homeowners
- Thermostat on HEAT (or AUTO), not COOL, and set above room temperature.
- Filter clean at the air handler, or filter screens clean in each ductless head.
- Breakers on for the outdoor and indoor units.
- Outdoor unit clear of leaves and debris.
- A few minutes allowed for a defrost cycle to finish.
SeaTac heat pump 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 |
| Thermostat replacement | $299 to $1,840 |
| Heat pump tune-up, ducted or hybrid | $308 to $399, depending on the type of system, or from $240 for Home Comfort Club members |
| Ductless tune-up, 1 to 2 indoor heads | $230, or $180 for members |
Prices as of November 2026. Dispatch and diagnostic fees are listed separately and are not added together into one price. Typical part costs: what heat pump repairs cost.
No repair starts until your technician has quoted an upfront price. For tune-up details, see the heat pump maintenance page.
Right now you can take $50 off HVAC service or repair (special offers). On the $30 a month Home Comfort Club, members pay 10% less on repairs. That member pricing leaves out dispatch fees, diagnostic time and after-hours charges, and it does not stack 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.
No heat from the heat pump late at night?
A heat pump that has stopped heating is a qualifying emergency. Our heating technicians work during business hours and are available after hours for qualifying HVAC emergencies. After hours, qualifying emergencies have a $330 after-hours dispatch fee instead of the $119, any day except holidays when we are closed (after-hours heat pump repair).
Repair or replace your SeaTac heat pump?
One failed part on a fairly young heat pump? Repairing it usually makes sense. Ask for a replacement price if the unit is older, the compressor is gone, it still runs on R-22, or leaks return after each fix. You get upfront prices for both paths from the technician (repair or replace a heat pump).
Repairs and tune-ups don't qualify for City Light or PSE rebates. If you replace, which rebate you can get depends on which side of S 160th Street you live; see heat pump replacement in SeaTac. Repairs that swap like-for-like parts usually need no permit; replacements need City of SeaTac permits, and we pull them.
Step by step: your SeaTac repair visit
- Phone (425) 645-0404 or book online. Let us know the system type, roughly how old it is and the number of units.
- Your NATE-certified tech drives down from Redmond in a truck stocked with common parts.
- The fault is traced with a diagnostic: $72 standard or $130 deeper.
- Nothing proceeds until you say yes to the upfront price.
- Most fixes happen that same visit, and any refrigerant circuit we open is leak-checked.
- Before leaving, we check for warm air at the registers. If we worked on the gas side of a hybrid, we also run a carbon monoxide check.
Recent job: a ductless head in Kent
In October 2026 a homeowner in nearby Kent, which borders SeaTac, called because a single-head Mitsubishi ductless system would not turn on. The filter in the bedroom head was so clogged that the system was shutting itself off to protect itself. Our technician cleaned the filter and the unit went back to heating. No parts were needed; the visit was the dispatch fee and diagnostic.
SeaTac neighborhoods we cover
Our heat pump techs work all over SeaTac, on both sides of S 160th Street: Angle Lake, McMicken Heights, Riverton Heights and Bow Lake, ZIP codes 98168, 98188 and 98198. If you rent and you are paying for the repair, go ahead and book. If not, send us your landlord's contact details and we will call them.
Close by: heat pump repair in Kent, and also Des Moines, Tukwila and Burien. About our work in the city: Home Comfort Alliance in SeaTac.
Reasons SeaTac households pick us for heat pump repair
- Fees posted in advance: $119 to dispatch, $72 or $130 to diagnose, then an upfront repair price
- Mitsubishi Electric Diamond Dealer, 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 heat pump repair FAQ
Who repairs heat pumps in SeaTac?
Home Comfort Alliance repairs ducted, hybrid and ductless heat pumps across SeaTac from our Redmond branch. Call (425) 645-0404. Our phones are answered and bookings are accepted 24/7.
What do you charge for a SeaTac heat pump repair visit?
The dispatch fee is $119. A standard diagnostic is $72, and a deeper one is $130. Before work starts, we give you an upfront price.
Can you fix a hybrid system with a heat pump and gas furnace?
Yes, either half. Whenever we repair the gas side, we run a carbon monoxide check before leaving.
Why is ice building up on my outdoor unit?
Light frost that clears during defrost is normal. Ice that stays or covers the coil points to a defrost, airflow or refrigerant problem. Wind across open lots can make defrost problems worse. Book a repair visit.
Why is my heat pump stuck on aux heat?
Some backup heat is normal in a hard freeze or while the unit defrosts. If it keeps running for most of a mild day, the heat pump is underperforming, and your City Light or PSE bill will show it. Schedule a repair visit.
Do you repair heat pumps after hours?
Yes. A heat pump that has stopped heating is a qualifying emergency. After hours, qualifying emergencies have a $330 after-hours dispatch fee instead of the $119.
Which utility is my SeaTac home on, and does it matter for a repair?
Seattle City Light serves SeaTac north of S 160th Street and Puget Sound Energy serves it south of S 160th Street. It does not change the repair price; it decides which rebates you can get if you replace the heat pump.
How much is a SeaTac heat pump tune-up?
For a ducted or hybrid heat pump, a tune-up runs $308 to $399, depending on the type of system, or from $240 for Home Comfort Club members. Ductless systems with 1 to 2 indoor heads are $230, or $180 for members.
Sources: U.S. Department of Energy, air-source heat pumps; City of SeaTac utilities; L&I city electrical permits; all read November 2026.
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 your SeaTac heat pump repair
Tell us what your heat pump is doing and our Redmond branch will set up the visit.
Get an estimate
We will call you to set up the visit.