Heat Pump Repair in Tupelo, MS

Heat pump symptoms and likely causes

Heat pump not heating

Low refrigerant charge, a reversing valve that failed to shift, a defrost board holding the unit in the wrong mode, or a thermostat configured so the system runs backup heat only.

Heat pump blowing cold air in heating mode

Often normal defrost operation, which lasts a few minutes. If cool air continues, the system has either lost heating capacity or the reversing valve is not shifting.

Heat pump not cooling

Same causes as a conventional air conditioner, plus the possibility that the reversing valve is stuck in heating position.

Outdoor unit frozen solid

A defrost failure. The defrost sensor, board, or reversing valve is not initiating or completing the cycle, so frost keeps accumulating until the coil is blocked.

Short cycling

Electrical faults, restricted airflow, low charge, or a control problem that satisfies and drops the call repeatedly.

Very high winter power bills

Usually backup electric heat running far more than it should, either because the heat pump has lost capacity or because the thermostat and staging are configured incorrectly.

Why backup heat configuration matters here

Most local heat pumps include electric resistance backup heat. It uses substantially more electricity than the heat pump itself, so it should engage only when the heat pump cannot keep up or during defrost.

When a thermostat is set up incorrectly, or when the heat pump has quietly lost capacity, backup heat carries the load and the homeowner sees a winter bill two or three times higher than expected. That is one of the most common and most fixable heat pump complaints in Northeast Mississippi.