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A compressor that never runs still ages. Homes in San Juan County, CO have essentially no cooling season — no month of the year is warm enough to call for it. Seals dry out, refrigerant migrates, and contacts corrode during long idle stretches rather than during operation. When a homeowner finally turns the system on during a rare warm spell, the contractor is diagnosing failure modes that come from disuse, not from accumulated runtime. That changes what gets inspected first: the contactor, the capacitor, and the refrigerant circuit all degrade on a parked system, and a quote built around wear from heavy use will miss the actual problem.
Half the homes in San Juan County, Colorado were built in 1979 or earlier (2020-2024 ACS 5-year). For a central AC repair in a house typical of this county, what a contractor finds once the unit is open is not always a straightforward parts match. Systems installed into housing stock this age have often been replaced once or twice already, and each replacement narrows what the next technician can source. A capacitor or contactor on a newer unit pulls from a wide supply chain. The same job on older equipment can mean tracking down a part the manufacturer no longer catalogs in its original spec.
The Parts of a Central AC a Contractor Checks First
The outdoor condenser unit sits outside the house, usually on a concrete pad beside the foundation, and it is where heat gets shed to the outside air. The indoor air handler or furnace coil sits inside, typically in a utility closet, basement, or attic. When a system stops cooling, both of these units are where a contractor starts.
The refrigerant lines run between those two units, and the expansion valve and evaporator coil handle the pressure changes that make the whole process work. The thermostat, mounted on an interior wall, is the control point, and a fault there can mimic a failure deeper in the system. The electrical components inside each unit, including contactors and capacitors, are also common points of failure a contractor will inspect.
The drawing shows a typical central AC layout, and a licensed contractor will determine which components and conditions apply to your specific home.
Get matched in San Juan CountySan Juan County, Colorado, by the numbers
95 severe weather events were recorded in San Juan 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 San Juan County, Colorado were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSan Juan County, Colorado holds 738 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 52.9% of the occupied homes in San Juan County, Colorado (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Central AC Repair in San Juan County, Colorado8 sourced rules and standards
What HVAC Repair Looks Like in San Juan County
Split-system central air conditioners rated below 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners rated at or above 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners manufactured between January 1, 2015 and December 31, 2022 had to meet 13 SEER, the metric that preceded SEER2.
Single-package central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Space-constrained central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 11.7 SEER2.
Federal efficiency standards for split-system central air conditioners and heat pumps are set on each certified combination of outdoor unit and indoor coil rather than on the outdoor unit alone.
Residential and light commercial air conditioning and heat pump systems assembled in the field, including mini-splits and unitary systems, may not be installed on or after January 1, 2025 using a refrigerant with a global warming potential above 700.
A field-assembled system whose specified components were all manufactured or imported before January 1, 2025 carries no installation compliance date under the refrigerant restrictions and may still be installed.
Severe Weather Events in San Juan County
Extreme weather puts real hours on HVAC equipment, and San Juan County's conditions are not the same as anywhere else in Colorado. Repair needs here follow the local pattern, which is why the data below is worth having before any conversation about what your system has been through.
95 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.