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.
If you're dealing with a system stuck blowing cold air in heating mode, an outdoor unit that's iced over and won't run its defrost cycle, or a system that switches modes but never actually reaches set temperature, you already know 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.

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.
You get a quoted price after the reversing valve and defrost cycle are actually tested, not billed for trial-and-error.
We test reversing valve solenoids, defrost thermostats, and control board timing directly.
From the first symptom to the final fix, these are the specific heat pump repair services our Beaver Dam-area crews are equipped for.
We test the valve's solenoid directly rather than assuming based on symptoms alone. This is one of the most requested heat pump repair calls we get across Beaver Dam, WI.
We verify the defrost cycle actually triggers under test conditions. Techs handling defrost cycle & control board repair carry the specific parts and tools this job calls for, not a generic kit.
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 Beaver Dam, WI.
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 Beaver Dam, WI.
Some icing is normal during defrost cycling; persistent icing that never clears points to a genuine fault. Techs handling outdoor unit icing diagnostics carry the specific parts and tools this job calls for, not a generic kit.
Indoor head unit and outdoor condenser are diagnosed as a connected system. This is one of the most requested heat pump repair calls we get across Beaver Dam, WI.

Describe whether the system is stuck in one mode, iced over, or not heating/cooling at all.
We confirm your Beaver Dam address and a realistic arrival window.
Flat-rate pricing follows the confirmed diagnosis.
Most reversing valve and defrost board repairs finish same-visit with parts carried on the truck.

Previous company just topped off refrigerant twice — this tech found the stuck reversing valve in ten minutes.
Turned out the defrost thermostat had failed, so it never actually triggered the defrost cycle.
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.

This is one of the most common and most misdiagnosed heat pump failures.
Some frost during a normal defrost cycle is expected; ice that never clears points to a defrost board or thermostat fault.
Heat pumps have a reversing valve, defrost cycle, and often auxiliary heat strips that standard AC systems don't have.
Heat pumps naturally work harder as outdoor temperatures drop, and auxiliary heat should engage below a certain threshold.
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.

Whether you're in the heart of Beaver Dam or one of the surrounding communities, dispatch routes the closest available technician.
☎ Call +1-866-805-8548 for Beaver Dam Service