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On a heat pump that is struggling to hold temperature, a contractor in Dunklin County starts with the reversing valve and the compressor before looking at anything else. Homes in Dunklin County, MO run heat about seven months a year, from October through April. Across that stretch, a heat pump cycles hard in heating mode, and the reversing valve switches direction every time the system runs a defrost cycle. Bearings wear, refrigerant pressure drops, and valve sluggishness shows up as rooms that cool when they should warm. A contractor who skips those components and quotes a refrigerant recharge first is pricing around the problem.
Ductwork in a house that has cycled through multiple systems over its life carries the fingerprints of every one of them: patches, reseals, and sections that were never quite right for the unit running through them. Half the homes in Dunklin County, Missouri were built in 1972 or earlier (2020-2024 ACS 5-year). When a heat pump shows up for repair in housing like this, what the contractor finds once the system is open shapes the job more than the fault code that sent them there. A failing contactor is a straightforward part. Duct joints that have been resealed twice over a disconnected plenum are a different conversation, and they are what determines whether the repair holds.
The Parts of a Heat Pump a Contractor Checks During Repair
The outdoor unit is the piece most homeowners recognize first, sitting on a pad beside the house and holding the compressor and condenser coil. The compressor is where a contractor often starts: if the system runs but moves little heat, or trips the breaker, that unit is the first suspect. The condenser coil wraps around it, and a bent or fouled coil will show up in the same symptoms.
Inside the house, the air handler holds the evaporator coil, the blower motor, and the metering device that controls refrigerant flow between the two units. A failed blower motor means air stops moving even when everything else runs. The refrigerant lines that connect the two units, and the reversing valve that lets the system heat and cool, are also points a contractor checks when the complaint does not trace back to the obvious pieces.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines what applies to the specific equipment and configuration in your house.
Find a contractor in Dunklin CountyDunklin County, by the numbers
111 severe weather events were recorded in Dunklin 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 Dunklin County, Missouri were built in 1972 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesDunklin County, Missouri holds 13,447 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 62.3% of the occupied homes in Dunklin County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Dunklin County
Extreme weather puts heat pumps under load at the worst moments, and the stress accumulates over time. Repair needs in Dunklin County reflect the local climate, which is why a picture of weather history belongs alongside any conversation about keeping this equipment running.
111 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.