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A heat pump here earns its wear in the cold half of the year, not spread evenly across both. Homes in New Madrid County, MO run heat about seven months a year, from October through April. Capacity falls as outdoor temperatures drop, so the compressor works hardest precisely when conditions punish it most. A contractor diagnosing a failed heat pump in this county checks the reversing valve, the low-pressure switch, and defrost controls before anything else, because those are the components the heating load stresses. The refrigerant charge and coil condition follow, since a marginal charge that ran unnoticed through summer becomes a repair bill in January.
Opened compressors and refrigerant circuits in houses this old frequently turn up components that match nothing on a current parts list, which sends a repair in a direction age alone could not predict. Half the homes in New Madrid County, Missouri were built in 1975 or earlier (2020-2024 ACS 5-year). A contractor pulling a heat pump apart here has to confirm what is actually inside before pricing anything, because a part that looks standard from the outside may draw from a supply chain that no longer exists in its original form. That gap between what the house holds and what distributors stock is where the repair cost gets decided.
The Parts of a Heat Pump a Contractor Checks First
The outdoor unit sits on a pad beside the house and holds the compressor and the condenser coil. The compressor is where most repair calls begin. When the system blows unconditioned air or shuts down on its own, a contractor will open that cabinet first and check both components.
The air handler lives inside the house, usually in a utility closet, basement, or attic, and it moves conditioned air through the home. Alongside it sits the expansion valve, which controls refrigerant flow between the two units, and the reversing valve, which lets the system shift between heating and cooling. Either one can produce symptoms that look like a compressor fault until a contractor tests them directly.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines which components apply and need attention in your specific home.
Find a contractor in New Madrid CountyNew Madrid County, by the numbers
105 severe weather events were recorded in New Madrid County, Missouri 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 New Madrid County, Missouri were built in 1975 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesNew Madrid County, Missouri holds 7,876 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 64.2% of the occupied homes in New Madrid County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in New Madrid County
Heat pumps work harder when outdoor conditions swing hard, and that mechanical load compounds over time. How often the weather here pushes equipment to its limits is a local fact, and it shapes how repair needs build up in New Madrid County.
105 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.