Heat Pump Repair in Sumrall, MS
Homes here need heat from November through March and cooling from May through October. If your system quits, tell us what it's doing and a licensed contractor who covers Lamar County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work a year, in Sumrall heat and cold
Your heat pump runs almost year round here, heat from November through March, cooling from May through October. That leaves it about one month of rest. On winter nights averaging 40°F it cycles into defrost and back again to keep frost off the outdoor coil, and each switch puts a load on the reversing valve. On summer afternoons near 91°F the compressor runs long stretches to keep the house cool, and that steady load is where a lot of failures start.
Mississippi has seen 101 damaging wind events over the past ten years, and in 2024 three in ten households across the state lost power for at least 24 hours. A heat pump that loses power mid-cycle can come back on with the outdoor unit not responding, or trip a breaker on restart. If your system is short cycling, running constantly without catching up, or blowing air that is not warm or cool enough, that is what it is telling you.
- 5 months
- November through March, your system heats
- 6 months
- May through October, it cools
- 40°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.
Mississippi tests contractors before it licenses them, and the State Board of Contractors keeps a record of who holds one. That license belongs to the contractor, not to any single job, so the same license applies whether the work is a new installation or a repair call like this one.
A heat pump repair means working on the refrigerant side of the system in most cases. Federal law requires EPA Section 608 certification for that work, in Mississippi or anywhere else. So this job carries the state license behind the contractor and the federal certification behind whoever handles the refrigerant.
Source: Mississippi State Board of Contractors
- Why is my heat pump blowing cold air?
- In heating mode, a heat pump moves warm air at a lower temperature than a furnace does, so air from the vents can feel cool even when it's working right. If the air feels cold rather than just mild, the problem is usually the reversing valve stuck in cooling mode, low refrigerant, or a compressor that isn't running. A contractor can check the refrigerant charge and test the reversing valve to find out which one it is.
- Why is there ice on my heat pump?
- A heat pump builds a thin layer of frost during normal defrost cycles in cold weather, and that clears on its own within an hour or so. Ice that stays or keeps building up points to low refrigerant, a dirty coil blocking airflow, or a fan that has stopped turning. With winter nights here averaging 40°F, the outdoor unit runs its defrost cycle often, so a unit that can't clear itself is worth having looked at before the coil ices over completely.
- Why is my heat pump running but not cooling?
- If the outdoor unit runs but the air coming from the vents isn't cold, the most common cause is low refrigerant from a leak. A dirty outdoor coil or a failing compressor can cause the same thing. With afternoons here reaching 91°F in summer, a system that's low on refrigerant will struggle to keep up, so it's worth having a contractor check the charge and look for a leak rather than waiting.