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A heat pump here earns most of its wear on the heating side. Homes in Union County, NM run heat about eight months a year, from October through May. Cold winters push the refrigerant circuit through more cycles than a mild climate would, and the reversing valve, which switches the system between heating and cooling modes, takes the brunt of that. A contractor diagnosing a struggling unit in Union County checks that valve early, along with the compressor and the defrost controls, before pricing any other repair.
Half the homes in Union County, New Mexico were built in 1961 or earlier (2020-2024 ACS 5-year). A heat pump sitting in stock that old has been running through desert heat and high-plain winters for long enough that what a contractor finds inside the unit varies sharply house to house. Worn contactor points, degraded capacitors, refrigerant lines showing stress at the fittings: these are the variables a repair hinges on, and none of them show from the outside. Parts availability matters here too, because a system old enough to match that housing stock may draw on a supply chain that has thinned out.
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 the part contractors look at early in a repair call because it drives the whole system. When the indoor side stops delivering conditioned air, a failed compressor or a refrigerant leak at the coil is often where the diagnosis leads.
The air handler sits inside, usually in a utility closet or attic, and moves air across the evaporator coil and through the house. The reversing valve lives inside the outdoor cabinet and is what lets a heat pump run in both directions. The expansion valve and the refrigerant lines that run between the two units are also on a contractor's checklist when the system is underperforming.
The drawing shows a typical heat pump layout, and a licensed contractor determines which components apply and what condition they are in for your specific home.
Get matched in Union CountyUnion County by the numbers
307 severe weather events were recorded in Union County, New Mexico 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 Union County, New Mexico were built in 1961 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesUnion County, New Mexico holds 2,101 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 72.4% of the occupied homes in Union County, New Mexico (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Behind Heat Pump Repair in Union County, New Mexico2 sourced rules & standards
Licensing and Legal Requirements in Union County, New Mexico
New Mexico’s contractor licence does not reach casual, minor or inconsequential work taken one project at a time and totalling no more than seven thousand two hundred dollars ($7,200) a year — but the exemption has to be declared to the division, it is not automatic.
New Mexico requires a contractor licence classified for the work being done: no person may act as a contractor without one, and mechanical work falls to the division’s mechanical bureau.
Severe Weather Events in Union County
Extreme weather puts heat pumps under load at exactly the moments they are least able to recover from a fault. Repair demand in Union County follows what the weather does, which makes local conditions a practical factor in keeping equipment running.
307 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.