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A contractor diagnosing a heat pump repair in Strafford County has to account for what the compressor has already been through before they can say whether a part has simply failed or whether the system has been working past its limits. Homes in Strafford County, NH run heat about eight months a year, from October through May. Cold air makes a heat pump work harder to extract heat, and a compressor cycling through a long heating season carries more strain than the same unit would in a shorter one. The reversing valve, which switches the system between heating and cooling mode, gets more use here than in milder climates. When a repair quote comes back higher than expected, the hours on those components are usually why.
Ductwork and wiring fitted for one generation of HVAC equipment carry a different set of wear patterns into the next. Half the homes in Strafford County, New Hampshire were built in 1979 or earlier (2020-2024 ACS 5-year). That gap is where a contractor earns the repair bill: what the opened system contains in a house of this age is often a mix of original and replacement components, and the worn parts are not always the ones that showed symptoms first. A refrigerant circuit that has been serviced under several ownership changes may have had more than one hand inside it, which changes what a careful inspection finds.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit sits on a pad beside the house and holds the compressor, which is the part contractors look at earliest when a heat pump stops performing. A failed compressor means no heat or cooling gets moved at all. The refrigerant coil wrapped around it and the fan that pulls air across it are checked alongside it, since a dirty or damaged coil can look like a compressor fault.
The air handler lives inside the house, usually in a utility closet, basement, or attic, and it holds the indoor coil and the blower that pushes conditioned air into the home. The reversing valve sits inside the outdoor unit and is what lets the system shift between heating and cooling modes. The expansion valve and the refrigerant lines connecting both units round out what a contractor traces when the problem is not obvious from the outdoor unit alone.
The drawing shows a general layout of these components, and a licensed contractor determines what applies to your specific house and system.
Get matched in Strafford CountyStrafford County by the numbers
97 severe weather events were recorded in Strafford County, New Hampshire 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 Strafford County, New Hampshire were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesStrafford County, New Hampshire holds 56,609 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 67.1% of the occupied homes in Strafford County, New Hampshire (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRepair Rules for Heat Pumps in Strafford County, New Hampshire2 sourced rules and standards
Licensing Rules for HVAC Repair in Strafford County, New Hampshire
New Hampshire's mechanical licensing board issues nine credentials — hearth system, four fuel gas endorsements, domestic appliance technician, and master, journeyman and apprentice plumber — and a licensee may not work outside the specialty their licence names. None of the nine is an HVAC licence.
New Hampshire does not license HVAC as a trade, and says so where it matters: the plumbing licence expressly does not reach a person installing heating, cooling, air conditioning or domestic water heating systems, whether solar, oil, gas or electric. The gas piping on a gas-fired system is a separate matter and needs a fuel gas fitter licence.
Severe Weather Events in Strafford County
New Hampshire weather puts real strain on heat pump systems, and that strain accumulates over time into repair needs. How hard the equipment has worked in Strafford County is part of what shapes the service picture here.
97 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.