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A heat pump running in heating mode is pushing against outdoor temperatures, and the colder it gets, the harder the refrigerant circuit works to pull heat from outside air. Homes in Lowndes County, MS run heat about five months a year, from November through March. That load falls heaviest on the reversing valve and the compressor, and a contractor diagnosing a repair here checks those first. A unit that was undersized at install, or that lost refrigerant charge over time, will show its limits on the coldest days of that run, not the mild ones. Coil condition matters too, because restricted airflow forces the compressor to work against higher pressures than it was rated for.
A heat pump sitting in a house this old has often been swapped in after the original system wore out, and then swapped again, with the wiring and refrigerant lines adapted each time rather than replaced outright. Half the homes in Lowndes County, Mississippi were built in 1981 or earlier (2020-2024 ACS 5-year). What a contractor finds when they open the unit reflects those layers: connections made to suit an older configuration, line sets that were repurposed rather than run fresh, and electrical work that met code when it was done but was sized for a different load. The repair itself may be straightforward; what surrounds it frequently is not.
The Parts of a Heat Pump a Contractor Checks During Repair
The outdoor unit is usually the first thing a homeowner notices when something goes wrong, and it is a common starting point for a contractor. It houses the compressor, the condenser coil, and the fan that moves air across them. A failed compressor, a dirty or bent coil, or a seized fan motor all show up here.
Inside the house, the air handler holds the evaporator coil and the blower that pushes conditioned air through the home. Running between the two units, the refrigerant lines and the reversing valve direct where heat moves depending on the season. A fault in the reversing valve is a frequent reason a heat pump heats when it should cool, or does neither.
The drawing alongside shows the general layout of a heat pump system, and a licensed contractor determines which components apply to your specific home and situation.
Find a contractor in Lowndes CountyLowndes County, by the numbers
161 severe weather events were recorded in Lowndes 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 Lowndes County, Mississippi were built in 1981 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesLowndes County, Mississippi holds 27,168 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 61.3% of the occupied homes in Lowndes County, Mississippi (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Heat Pump Repair in Lowndes County, Mississippi1 sourced rules & standards
Licensing Rules for HVAC Repair in Lowndes 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 Lowndes County
Weather extremes put heat pumps under load they were not sized to ignore, and Lowndes County's climate is the operating condition every local unit lives with. How often that stress arrives shapes how hard the equipment works and what repair needs follow.
161 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.