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A heat pump here earns its wear in heating mode, and the refrigerant circuit, the reversing valve, and the compressor carry most of it. Homes in Washington County, OR run heat about nine months a year, from October through June. Capacity drops as outdoor temperatures fall, so the compressor cycles harder and more often through the coldest stretches of that run. A contractor diagnosing a failed component checks refrigerant charge and compressor draw first, because those are where a long heating season leaves its marks. Faults that started small in January show up as failures by March, when the system has been asked the most.
Ductwork put in for earlier equipment rarely meets what a heat pump needs from it without at least some attention. Half the homes in Washington County, Oregon were built in 1990 or earlier (2020-2024 ACS 5-year). A contractor opening a heat pump here will check the system itself, but seals, flex runs, and register sizing from the original build often account for as much of the repair scope as the unit does. Parts availability is the other variable: equipment installed into older stock tends to have been there long enough that sourcing what it takes requires more than a standard order.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit sits on a pad beside the house and holds the compressor and one set of coils. The compressor is where most repair calls start. When it runs poorly or not at all, the whole system feels it. The coils in that cabinet transfer heat to or from the outdoor air, and dirt or damage there shows up fast.
Inside the house, the air handler contains a second coil and the blower that moves air through your home. The reversing valve, which sits within the refrigerant circuit, is what lets the system shift between heating and cooling. A contractor also checks the refrigerant lines that run between the two units and the thermostat that tells everything what to do.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines what applies to your specific house.
Get matched in Washington CountyWashington County, Oregon, by the numbers
7 severe weather events were recorded in Washington County, Oregon between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Washington County, Oregon were built in 1990 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesWashington County, Oregon holds 243,278 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 60.8% of the occupied homes in Washington County, Oregon (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRepair Rules for Heat Pumps in Washington County, Oregon2 codes & standards
What Washington County, Oregon Requires for HVAC Repair
Oregon’s contractor licence does not reach casual, minor or inconsequential work on one structure where the person’s contracts total less than $1,000 — and the exemption is unavailable to anyone who advertises or signs themselves as a contractor, at any price.
Oregon requires a current Construction Contractors Board licence, with the right endorsement, to undertake, offer to undertake or bid construction work.