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A contractor quoting a heat pump repair here has to account for what the equipment has already been through before the fault even appears. Homes in Sheridan County, WY run heat about ten months a year, from September through June. That means the compressor has been cycling through repeated cold-weather starts, which is the hardest thing a heat pump does. The reversing valve, the defrost board, and the low-ambient controls all accumulate wear on the heating side, and those are the components a contractor checks first when a system is struggling late in the season.

Refrigerant circuit wear, control board corrosion, and coil condition are what a technician is working out once a heat pump here is opened up. Half the homes in Sheridan County, Wyoming were built in 1983 or earlier (2020-2024 ACS 5-year). Housing that spent much of its life on a different heating system puts a heat pump in a position where the structure around it was never sized to its needs, and the system itself has been compensating ever since. A part that tests marginal on the bench may have been running that way for seasons. That history shapes what the repair turns out to be.
The Parts of a Heat Pump a Contractor Checks During Repair

The outdoor unit is usually where a contractor starts. It houses the compressor, which is the part that does the heaviest work moving refrigerant through the system, and the outdoor coil, which sheds or pulls in heat depending on the season. When either of those fails, the whole system suffers. The fan that pulls air across that coil is another common point of failure.
Inside the house, the air handler holds the indoor coil and the blower fan that pushes conditioned air into the living space. The expansion valve sits between the two coils and controls refrigerant flow. The refrigerant lines connecting the indoor and outdoor units, along with the reversing valve that lets a heat pump switch between heating and cooling, round out what a contractor will examine.
The drawing shows a typical heat pump layout, and a licensed contractor determines what applies to your specific home and equipment.
Find a contractor in Sheridan CountySheridan County, by the numbers
189 severe weather events were recorded in Sheridan County, Wyoming 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 Sheridan County, Wyoming were built in 1983 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSheridan County, Wyoming holds 15,461 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 70.7% of the occupied homes in Sheridan County, Wyoming (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Sheridan County
Extreme weather puts real stress on heat pump systems, and how hard a system works over time shapes what repairs it eventually needs. That load is local, and the record below shows what the equipment in this area has been up against.
189 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.