Heat Pump Repair in Greenville, MS
Homes here need heat from November through March and cooling from May through September. If your system quits, tell us what it's doing and a licensed contractor who covers Washington County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of work a year in Greenville
Your heat pump runs almost year round here. Heat from November through March, cooling from May through September, only two months off. That kind of run time wears on the compressor and the outdoor fan motor faster than a system that gets to rest half the year.
Winter nights averaging 37°F mean the outdoor unit runs its defrost cycle often, and summer afternoons near 91°F push the compressor hard on the other end. Add in the wind. Washington County has logged 84 damaging wind events over the past ten years, and wind that strong can bend a fan blade or knock debris into the outdoor coil. When that happens, you will notice the air coming from your vents turn weak or lukewarm, or the outdoor unit humming without the fan actually turning.
- 5 months
- November through March, your system heats
- 5 months
- May through September, it cools
- 37°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Mississippi requires HVAC contractors to hold a state license.
The license is issued to the contractor, not to the specific job. It does not get renewed or reissued each time someone hires them. It comes from the State Board of Contractors, which is the body Mississippi uses to license HVAC contractors.
Repairing a heat pump means working on the refrigerant side of the system in most cases. That work falls under a separate federal rule that applies in every state. Anyone who opens the refrigerant lines has to hold EPA Section 608 certification. So on this job there are two things to look for. The state license on the contractor, and the federal certification on whoever actually handles the refrigerant.
Source: Mississippi State Board of Contractors
- Why is my heat pump blowing cold air?
- In winter this usually means the heat pump is stuck in defrost mode or the reversing valve is not switching over correctly. Heat pumps warm air by moving heat, not by burning fuel, so the air at the vent never feels as hot as a furnace's air, and on a 37 degree night that can feel cold even when the system is working right. If the air coming out is truly cold rather than just cool, have a contractor check the reversing valve and the refrigerant charge.
- Why is there ice on my heat pump?
- A heat pump normally builds a light frost in winter and clears it on its own through a defrost cycle. If ice is thick or covers the whole coil, the defrost cycle is not kicking in, or airflow across the outdoor unit is blocked. Check that nothing is stacked against the unit and that the fan spins freely, then have a contractor look at the defrost control if the ice keeps coming back.
- Why is my heat pump running but not cooling?
- If the unit runs but the air is not cold, the refrigerant charge is likely low or the coil is dirty or frozen. On a 91 degree afternoon a heat pump low on refrigerant has to work harder to move heat out of the house, and it will fall behind. Anyone opening the refrigerant side of the system has to hold EPA certification, so this is a job for a licensed contractor, not something to check yourself.