Heat pumps fail differently than standard AC or furnace systems, and diagnosing them requires understanding the reversing valve and defrost board specifically.
Auxiliary heat strip issues are checked alongside the heat pump itself.
A heat pump that seems to be 'not heating' is often actually a reversing valve or defrost cycle problem, which a technician trained mainly on standard ac systems can easily misdiagnose, which is exactly why heat pump repair calls in Seattle, WA get treated with urgency, not a next-available-Tuesday slot.

Waiting rarely saves money and often turns a same-day repair into a longer, more involved job.
AAA Pro HVAC built its heat pump repair process around one idea: diagnose first, quote honestly, fix it right.
We're licensed, insured, and staffed with techs who've spent years specifically on heat pump repair, not general handyman work with an HVAC certificate bolted on.

Heat pump failure modes are different enough from standard AC that generic diagnostics often miss the actual cause.
No-heat calls in winter get the same priority as no-cool calls in summer.
Auxiliary heat strip diagnostics are included in the same visit when relevant.
We test reversing valve solenoids, defrost thermostats, and control board timing directly.
Every job starts with a real diagnosis, not a guess — here's the full scope of what our heat pump repair technicians handle across Seattle, WA.
A stuck reversing valve is the single most common reason a heat pump gets stuck in one mode. Techs handling reversing valve diagnosis & repair carry the specific parts and tools this job calls for, not a generic kit.
An outdoor unit that ices over and never defrosts usually points to a failed defrost thermostat or control board timing issue. This is one of the most requested heat pump repair calls we get across Seattle, WA.
We test heat strip elements and the relay controlling them separately. This is one of the most requested heat pump repair calls we get across Seattle, WA.
We charge to the manufacturer's heat pump-specific target, not a generic number. This is one of the most requested heat pump repair calls we get across Seattle, WA.
Some icing is normal during defrost cycling; persistent icing that never clears points to a genuine fault. This is one of the most requested heat pump repair calls we get across Seattle, WA.
Ductless mini-split heat pumps have their own fault-code language separate from central systems. This is one of the most requested heat pump repair calls we get across Seattle, WA.

Describe whether the system is stuck in one mode, iced over, or not heating/cooling at all.
We confirm your Seattle address and a realistic arrival window.
Reversing valve, defrost cycle, and refrigerant charge are tested against heat pump-specific specs before any quote.
Workmanship is guaranteed and documented on your invoice.

Previous company just topped off refrigerant twice — this tech found the stuck reversing valve in ten minutes.
Outdoor unit was constantly covered in ice and I thought that meant it was broken.
They tested the relay separately from the strips themselves and found the actual fault fast.
Ductless heat pump in the addition threw a code I couldn't find anywhere online.

Often a stuck reversing valve, which controls whether the system is in heating or cooling mode.
Some frost during a normal defrost cycle is expected; ice that never clears points to a defrost board or thermostat fault.
A technician needs specific training on these components to diagnose heat pump issues accurately.
If auxiliary heat isn't kicking in properly, that's a specific fault we can test for.
Yes — indoor head units and outdoor condensers on ductless heat pump systems are within our service scope.
Call for a live arrival estimate based on current demand.

Our heat pump repair crews are positioned throughout Seattle, WA to keep response times realistic, not just promised.
☎ Call +1-866-805-8548 for Seattle Service