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A heat pump in Costilla County works through a heating load that would stress a system in any climate. Homes in Costilla County, CO run heat about ten months a year, from September through June. Outdoor temperatures in this part of southern Colorado drop hard in winter, and a heat pump loses capacity as the mercury falls, which means the compressor and the defrost system cycle far more aggressively than they would in a mild zone. A contractor diagnosing a fault here checks refrigerant charge and the defrost board early, because both components absorb the heaviest share of that load and both degrade in ways that show up as heating failure before anything else does.

Half the homes in Costilla County, Colorado were built in 1985 or earlier (2020-2024 ACS 5-year). A house built for one kind of system and later fitted with a heat pump carries that history inside the unit: components that have been working against the gap between what the house was designed to run and what actually runs in it now. When a contractor opens the equipment, the question that decides the repair is whether the parts it takes are still in production. For stock of this vintage, that answer is not always yes, and the repair scope shifts accordingly.
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 condenser coil, which together do the heavy lifting of moving heat. When a heat pump stops heating or cooling, the compressor and that coil are where a contractor starts. A refrigerant leak, a failed capacitor, or a seized compressor will each show up there.
Inside the house, the air handler hangs in a closet, utility room, or attic and contains the blower motor, the evaporator coil, and the expansion valve. The refrigerant lines connecting the two units and the reversing valve that lets the system run in both directions are also points a contractor checks when the system is behaving oddly in only one mode.
The drawing shows a typical layout, and a licensed contractor determines which components apply to the specific system in your home.
Get matched in Costilla CountyCostilla County, by the numbers
309 severe weather events were recorded in Costilla 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 Costilla County, Colorado were built in 1985 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCostilla County, Colorado holds 2,433 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 79.0% of the occupied homes in Costilla County, Colorado (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Costilla County
Extreme weather puts heat pumps under load they were not built to run at constantly, and the cumulative effect shows up as wear, fault codes, and failed components. How hard a heat pump works over its life is a local question, and the record below reflects what the equipment in this county has been working against.
309 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.