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A heat pump in this house runs its compressor and reversing valve hard through the cold months, then sits idle through a long stretch of warm weather. Homes in Washington County, MS run heat about five months a year, from November through March. Faults that develop at the end of a heating season go unnoticed until the first cold snap the following fall, when the system starts again under load. A contractor diagnosing a repair here checks the reversing valve and refrigerant charge first, because those are the components that cycle most during heating mode and hold damage quietly through the off-season.
Opened equipment in a house this old tends to surface components that are no longer stocked at the regional level, and a contractor who cannot source a part locally has to price and schedule around that before the repair can close. Half the homes in Washington County, Mississippi were built in 1973 or earlier (2020-2024 ACS 5-year). That gap between the building and the systems now running in it is where repair jobs stall: the unit itself may be repairable, but the part it takes has a lead time the homeowner did not expect.
The Parts of a Heat Pump a Contractor Checks During Repair
The outdoor unit is usually where a contractor starts. It houses the compressor, which does the hardest mechanical work in the system, and the outdoor coil, which sheds or pulls heat depending on the season. A failed compressor, a refrigerant leak at the coil, or a burned capacitor that keeps the fan from spinning are all found here.
Inside the house, the air handler holds the indoor coil and the blower that moves conditioned air through your home. The refrigerant lines connecting the two units, and the reversing valve that switches the system between heating and cooling modes, are also points a contractor examines when the system runs but does not perform as expected.
The drawing shows a typical heat pump layout, and a licensed contractor determines which components apply to the specific system in your home.
Find a contractor in Washington CountyWashington County, Mississippi, by the numbers
115 severe weather events were recorded in Washington County, Mississippi 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 Washington County, Mississippi were built in 1973 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesWashington County, Mississippi holds 20,867 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 60.2% of the occupied homes in Washington County, Mississippi (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Heat Pump Repair in Washington County, Mississippi1 sourced rules & standards
Licensing and Legal Requirements in Washington County, Mississippi
Mississippi licenses residential HVAC work at every tier and at any price: a subcontractor of any tier doing heating, ventilation or air conditioning work on a residential construction or improvement project must be licensed by the State Board of Contractors no matter the dollar amount.
Severe Weather Events in Washington County
Heat pumps run hardest when the weather outside pushes hardest against them. How often that happens here shapes how much wear the equipment takes and how often repair becomes a real conversation.
115 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.