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A heat pump doing repair work in Delaware County has almost certainly spent far more of its life pushing heat into the house than pulling it out. Homes in Delaware County, NY run heat about nine months a year, from September through May. Heating mode is the harder half: capacity drops as outdoor temperatures fall, so the reversing valve, refrigerant circuit, and compressor all cycle under strain through the coldest months. A contractor diagnosing a fault here checks those components first, because that is where accumulated wear concentrates on a system that rarely gets a long idle stretch between heating seasons.
Ductwork in a house carries the history of every system that has run through it, and in much of Delaware County that history runs deep. Half the homes in Delaware County, New York were built in 1972 or earlier (2020-2024 ACS 5-year). A heat pump that fails in a house of that vintage has often been running on components that manufacturers have cycled out of active production, which means a contractor who opens the unit is pricing a repair against what the parts market actually has, not a standard catalog. Sourcing becomes part of the job in a way it simply is not for newer equipment.
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 together move heat between the refrigerant and the outside air. When a heat pump stops heating or cooling, the compressor and that coil are where a contractor looks first. A failed compressor or a damaged coil will stop the system cold.
Inside the house, the air handler contains the evaporator coil and the blower fan, which pull conditioned air across the coil and push it through the home. Running between the two units, the refrigerant lines and the reversing valve control which direction heat moves. The reversing valve is the piece most specific to a heat pump, and a stuck or failed valve is a common reason the system heats when it should cool or does nothing at all.
The drawing shows a typical heat pump layout, and a licensed contractor will determine which parts apply to your specific system and situation.
Get matched in Delaware CountyDelaware County, New York, by the numbers
159 severe weather events were recorded in Delaware County, New York 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 Delaware County, New York were built in 1972 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesDelaware County, New York holds 30,057 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 77.3% of the occupied homes in Delaware County, New York (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Delaware County
Weather extremes put real hours on heat pump compressors, reversing valves, and defrost controls. The repair load a system carries over its life is a direct product of local conditions, which is why the pattern here in Delaware County matters for any conversation about what your equipment has been through.
159 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.