Heat Pump Repair in Issaquah, WA
Ducted, ductless and dual fuel heat pump repair across Issaquah from our Redmond team, with 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
Heat pump repair in Issaquah, in short
Home Comfort Alliance repairs ducted and ductless heat pumps across Issaquah, WA, with an upfront price before any work begins. We repair the heat pump side of dual fuel systems too. A repair visit has a $119 dispatch fee and a $72 standard diagnostic, listed separately, and you approve the written repair price first.
Issaquah is served by our Redmond team. Call (425) 645-0404: our phones are answered and bookings are accepted 24/7.
Breaker keeps tripping or you smell burning? Turn the heat pump off at the thermostat and leave the breaker off, then call. In a dual fuel home, a gas smell means leaving the house and calling PSE at 1-888-225-5773 or 911 from outside.
Five checks first
- Thermostat on HEAT, set above room temperature, with fresh batteries.
- Breakers for both the outdoor unit and the indoor unit or air handler.
- Filter at the air handler, or the washable filters inside each ductless head.
- Outdoor unit clear of fallen leaves, needles and snow; Issaquah's evergreens drop a lot onto outdoor coils.
- If the outdoor unit is steaming with the fan stopped, it is probably defrosting. Wait ten minutes.
Signs your heat pump needs repair
- It cools fine in summer but struggles or blows cool air in winter.
- AUX or EM heat shows on the thermostat for most of the day.
- Ice builds up on the outdoor coil and does not clear.
- The outdoor fan or compressor will not start, or hums and stops.
- A ductless head shows a blinking error code or drips water.
- Short cycling, or a breaker that trips.
- A PSE bill that climbs with no change in use.
Works in summer, fails in winter?
This is a common heat pump question. In heating mode, the reversing valve switches the refrigerant flow, and the defrost control periodically flips it back to melt frost off the outdoor coil. Neither is used much in summer. A sticking reversing valve, a failed defrost board or sensor, or a slow refrigerant leak that only shows up when the outdoor air is cold can all leave you with a heat pump that cooled perfectly in August and struggles in November.
A diagnostic separates these quickly: refrigerant pressures and temperatures on both sides of the system, a forced defrost test, and a check of the valve solenoid and the board outputs.
Ice, defrost and emergency heat
A light, even frost that melts away during each defrost cycle is normal. A thick block of ice, ice only on part of the coil, or ice on the refrigerant lines is not. Turn the system to EM heat if you have it, do not chip the ice, and book a repair.
AUX means the backup heat is helping the heat pump, which is normal in cold snaps and during defrost. EM means only the backup is running. Electric backup heat costs much more to run, so a thermostat that shows AUX all day in mild weather is a sign something in the heat pump is not pulling its weight.
Ductless and mini-split repair
We repair ductless indoor heads and outdoor units of all major brands: sensors, drain lines, fan motors, boards and communication faults between the heads and the outdoor unit. Home Comfort Alliance is a Mitsubishi Electric Diamond Dealer. More about ductless systems.
Common heat pump repairs
| Part | What you notice |
|---|---|
| Capacitor | Outdoor unit hums but the fan or compressor will not start |
| Contactor | Outdoor unit will not turn on, or will not turn off |
| Outdoor fan motor | Compressor runs, fan does not spin; high pressure trips |
| Defrost board or sensor | Heavy icing, or the system cycles off and on in defrost |
| Reversing valve | Cools but will not heat, or heats weakly |
| Refrigerant leak | Weak heat, icing, long run times; we find the leak before adding refrigerant |
| Thermostat | Wrong mode, no call for heat; replacement runs $299 to $1,840 |
See our heat pump repair cost guide for what each part usually involves.
How a heat pump repair visit works
- Book online or by phone. Same-day service when possible.
- A NATE-certified technician checks the thermostat, indoor unit and outdoor unit.
- We measure refrigerant pressures, compressor and fan amp draw, and test the capacitor, contactor and defrost controls.
- You get a written repair price before any work begins.
- Our trucks are fully stocked, so most repairs can be handled on the spot.
- We test the system in heating mode 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 a heat pump that has stopped heating or a burning or electrical smell. Standard visits run Monday to Friday, 8 AM to 5 PM.
Heat pump repair prices in Issaquah
Our fees are published, and the dispatch fee and diagnostic appear as 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 |
| Heat pump tune-up, per piece of equipment | $230 ($180 Club) |
| Thermostat replacement | $299 to $1,840 |
Prices as of October 2026. The standard and deeper diagnostics are one or the other, never both.
Seattle benchmark, not our price: Angi lists heat pump repair at $220 to $2,220 (May 2026) (Angi heat pump repair costs).
Offers this season: 10% Off Heat Pump Tune-Up, $50 Off Emergency No Heat Calls, and $50 off HVAC service or repair (special offers; not combinable with Club pricing). Financing with 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 your heat pump?
Boards, capacitors, contactors, sensors and fan motors are routine repairs. A failed compressor, a leaking coil on an older unit, or a system on R-22 refrigerant is the point to compare a replacement price.
If you replace an out-of-warranty, centrally ducted, all-electric heat pump with a qualifying cold-climate ducted model, PSE pays $1,500 plus an income-based Efficiency Boost of up to $2,400; ductless and dual fuel systems are excluded, and a PSE Trade Ally or REP must do the work (PSE upgrade rebate, read October 2026). Home Comfort Alliance is a PSE Trade Ally. Issaquah is also an Energy Smart Eastside city; for replacing an existing heat pump, ask us first and we will check whether your system qualifies (Energy Smart Eastside).
Replacement estimates are free, and our instant HVAC quote gives a range in about 30 seconds. We size every installation with an ACCA Manual J load calculation, and what you get with a replacement is a 3-year Comfort Shield labor warranty on new installations, kept active with yearly maintenance. First-year maintenance is included. See heat pumps in Issaquah and cold-climate heat pumps.
Dual fuel systems
In a dual fuel home the heat pump carries the load until the outdoor temperature drops to a set point, then the gas furnace takes over. When one half fails, the other often runs more than it should. This page covers the heat pump side; for the furnace, see furnace repair in Issaquah.
Permits and utilities in Issaquah
PSE supplies electricity and natural gas 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 heat pump inside city limits needs a City of Issaquah permit through MyBuildingPermit (Permit Center 425-837-3100, Issaquah permits), and residential outdoor HVAC equipment goes through plan review (Issaquah mechanical permits). Klahanie is in the City of Sammamish, and Mirrormont is unincorporated King County (206-296-6600). Electrical permits come from Washington L&I. We pull the required permits for every installation.
A recent Issaquah heat pump visit: getting ready for winter
This one was a maintenance visit, not a breakdown: in mid October our technician serviced a dual fuel system (gas furnace plus heat pump) in an Issaquah home in 98027 before the cold set in.
On the heat pump side he tested the capacitor and contactor, measured the low and high side refrigerant pressures and the compressor amp draw, and checked that the indoor coil was draining. Those are the parts that fail most often on the first cold mornings, which is why a fall tune-up catches so many winter repairs early. The furnace side got its own checks, from igniter resistance and flame sensor to gas pressure and venting.
From our October 2026 service records; customer details are kept private.
Why Issaquah homeowners call us
- Mitsubishi Electric Diamond Dealer, Carrier Factory Authorized Dealer and Lennox Premier Dealer.
- TrustAnalytica Top 10 HVAC Contractor 2026 (Redmond).
- NATE-certified technicians and 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.
- Locally owned since 1977.
Issaquah heat pump repair FAQ
How much does heat pump repair cost in Issaquah?
Repair visits carry a $119 dispatch (trip) fee. Diagnosis is $72 standard 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. For context, Angi lists Seattle-area heat pump repairs at $220 to $2,220 (May 2026); that is not our price.
Why does my heat pump work in summer but not in winter?
Heating mode uses parts that cooling never does, such as the reversing valve and defrost controls, and a small refrigerant leak often shows up first in cold weather. A diagnostic finds which.
Why is my heat pump blowing cold air?
Heat pump air feels cooler than furnace air, so lukewarm air can be normal. Cold air for long stretches can point to a defrost cycle, thermostat settings, a reversing valve or low refrigerant. Check that the thermostat is on HEAT and the filter is clean, then call us.
Why is my heat pump covered in ice?
Light frost that clears during defrost is normal. Ice that stays, or a solid block on the coil, points to a defrost control, sensor, fan or refrigerant problem. Do not chip the ice; switch to emergency heat if you have it and book a repair.
Why does my heat pump run on aux or emergency heat?
Aux heat is backup heat that helps in cold weather and during defrost; EM heat runs only the backup. If AUX runs most of the day in mild weather, or your bill jumps, have the system checked.
Do you repair ductless mini-splits?
Yes. We repair ducted and ductless heat pumps of all major brands. We are a Mitsubishi Electric Diamond Dealer, Carrier Factory Authorized Dealer and Lennox Premier Dealer, and our technicians are NATE-certified.
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 a heat pump that has stopped heating.
Do you serve all of Issaquah?
Yes. Our Redmond team repairs heat pumps across Issaquah, in ZIP codes 98027 and 98029, including homes just outside city limits. Redmond is a service location, so we come to you.
How much is a heat pump tune-up?
$230, or $180 for Home Comfort Club members, per piece of equipment. Ask about our 10% Off Heat Pump Tune-Up offer; offers cannot be combined with Club pricing.
Will PSE help pay to replace my old heat pump?
Not for repairs. If your current ducted, all-electric heat pump is out of warranty and you replace it with a qualifying cold-climate ducted model, PSE offers a $1,500 rebate plus an income-based Efficiency Boost of up to $2,400. Ductless and dual fuel systems are not eligible. We are a PSE Trade Ally. For Energy Smart Eastside, ask us first: we check whether your replacement qualifies.
Do I need a permit for heat pump work 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 heat pump inside city limits needs a City of Issaquah permit, and outdoor HVAC equipment goes through plan review. Klahanie homes go through the City of Sammamish and unincorporated homes such as Mirrormont through King County. We pull the required permits for every installation.
Is Home Comfort Alliance licensed?
Yes. WA Contractor Reg. #HOMECCA785BD and WA Electrical Contractor Lic. #HOMECCA782DC. Licensed, bonded and insured in Washington, BBB Accredited since 2002.
Sources (checked October 22, 2026): PSE, heat pump to heat pump upgrade rebate; Energy Smart Eastside, rebates; City of Issaquah, permits; City of Issaquah, mechanical permits; Angi, Seattle heat pump repair cost (May 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 heat pump repair in Issaquah
Tell us what the heat pump is doing. A technician from our Redmond team will find the fault and give you a written, upfront price before any work begins.
Request heat pump repair
We will call you to set up the visit. If your heat pump has stopped heating after hours, call (425) 645-0404.