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A heat pump here does not get the long summer idle that gives compressors in other climates a rest. Homes in Lane County, OR run heat about ten months a year, from September through June. The reversing valve cycles between heating and cooling mode far more often than most homeowners expect, and a contractor diagnosing a capacity problem looks at that valve and the compressor before anything else. Refrigerant charge, contactor wear, and defrost board behavior all follow from there. The parts that fail on a system like this fail from cycling, not from sitting.
Half the homes in Lane County, Oregon were built in 1977 or earlier (2020-2024 ACS 5-year). Housing built for one kind of system and later adapted to run a heat pump puts stress on the components in ways that do not show up until the unit is open. A contractor pulling a compressor or checking refrigerant charge here is also reading what years of undersized airflow and marginal electrical supply have done to the parts. That is not visible from the outside, and it changes what the repair actually involves once the work is underway.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit sits outside the house and holds the compressor and the condenser coil. The compressor is usually where a contractor starts when a heat pump stops moving heat properly. A failed compressor, a refrigerant leak at the coil, or a seized fan motor in that cabinet will each produce distinct symptoms that point toward or away from that unit.
Inside the house, the air handler contains the blower motor and the evaporator coil, and it is the other main suspect when airflow drops or the system runs but nothing changes in the space. The expansion valve and the reversing valve sit within the refrigerant circuit and are checked when the system heats in one mode but not the other, or loses the ability to switch between modes.
The drawing shows a typical layout, and a licensed contractor determines which components apply to your specific system and what work each one needs.
Get matched in Lane CountyLane County, Oregon, by the numbers
20 severe weather events were recorded in Lane 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 Lane County, Oregon were built in 1977 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesLane County, Oregon holds 169,788 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 59.7% of the occupied homes in Lane County, Oregon (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards for Heat Pump Repair in Lane County, Oregon2 sourced rules and standards
What Lane County, Oregon Requires for HVAC Repair Work
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.