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Homes in Weld County, CO run heat about eight months a year, from October through May. A heat pump running through a cold Colorado winter works the refrigerant circuit hard: the coil outside is pulling heat from air that drops well below freezing, and the compressor cycles against that load repeatedly. The reversing valve, which switches the system between heating and cooling modes, takes the most stress at the shoulders of the season when temperatures swing. On a repair call here, a contractor checks those components before anything else, because that is where the accumulated wear from a long heating season shows up first.

Half the homes in Weld County, Colorado were built in 2001 or earlier (2020-2024 ACS 5-year). That matters for repair work because a house of this age was wired and ducted for equipment that has likely been replaced at least once since the original install, and the components a contractor pulls from a system running in that house reflect what each successive owner chose, not what the house was built for. Once the unit is open, the question is whether the parts it actually takes are still in production. If they are not, the repair scope changes before the quote does.
The Parts of a Heat Pump a Contractor Checks First

The outdoor unit sits outside the house and holds the compressor and condenser coil, which are the pieces a contractor reaches first when a heat pump stops performing. The compressor is the heart of the system; when it fails, nothing moves. The condenser coil sits around it, and a bent or blocked coil is a common source of reduced output.
Inside the house, the air handler holds the evaporator coil and the blower fan, which together move conditioned air into the living space. The reversing valve, tucked inside the outdoor unit, is what lets the system run in both directions, and it is a frequent point of investigation when a heat pump heats in one season but not the other. The refrigerant lines connecting both units are also on the checklist, since a leak there affects the whole system.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines which components apply to your specific home and situation.
Get matched in Weld CountyWeld County, by the numbers
637 severe weather events were recorded in Weld County, Colorado 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 Weld County, Colorado were built in 2001 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesWeld County, Colorado holds 129,637 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 76.0% of the occupied homes in Weld County, Colorado (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Weld County
Heat pump systems work against whatever the weather puts on them, and in Weld County that load shifts with every storm that rolls through. Repair demand follows that pattern, which is why local weather history is part of the picture for any contractor servicing equipment here.
637 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.
