Tell us about the job
Takes about a minute. No obligation.
The refrigerant circuit in a heat pump here does most of its work in heating mode, and the defrost cycle runs through the wet, cold months that define winter west of the Cascades. Homes in Multnomah County, OR run heat about nine months a year, from October through June. A contractor diagnosing a failed heat pump in this county looks first at the reversing valve, the defrost board, and the outdoor coil, because those parts cycle hardest across the heating season. An undersized system shows its stress in those same components before it shows up anywhere else.
Opened equipment in a house this old can send a contractor searching for components that have been discontinued for years. Half the homes in Multnomah County, Oregon were built in 1972 or earlier (2020-2024 ACS 5-year). That gap between the building and what runs in it now is where a repair job gets complicated: a refrigerant fitting, a control board, a contactor sized for an older spec may take time to source, or may not be sourceable at all. The contractor's first job is identifying exactly what the system is, then checking whether the parts it needs are still made.
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 where most repair calls begin. When a heat pump stops moving heat in either direction, or makes noise it did not used to make, the compressor and its surrounding components are where a contractor starts.
The air handler lives inside the house, most often in a closet, attic, or utility room, and it holds the indoor coil and the blower fan. The expansion valve and the refrigerant lines run between the two units. A fault in the air handler shows up as weak airflow or ice on the coil; a fault in the lines shows up as refrigerant loss.
The drawing shows a typical layout, and a licensed contractor determines which components apply to your specific system and what repair each one needs.
Get matched in Multnomah CountyMultnomah County, by the numbers
49 severe weather events were recorded in Multnomah 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 Multnomah County, Oregon were built in 1972 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesMultnomah County, Oregon holds 371,179 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 53.4% of the occupied homes in Multnomah County, Oregon (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Heat Pump Repair in Multnomah County, Oregon2 sourced rules and standards
Licensing and Legal Requirements in Multnomah County, Oregon
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.
Severe Weather Events in Multnomah County
Weather puts a load on heat pumps. Hard conditions force the equipment to work harder and longer, and that wear shows up as repair needs that are specific to what the local climate actually delivers.
49 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.