Heat pump faults fall into two groups: the ones shared with any air conditioner, such as capacitor failures, refrigerant leaks and fan motor problems, and the ones unique to heat pumps, principally reversing valve failures and defrost control faults. The second group is what most general HVAC calls get wrong.
A heat pump that heats poorly in cold weather is not automatically broken. These systems lose capacity as outdoor temperature drops, which is normal physics and why they pair with backup heat. The genuine faults look different: a unit stuck in cooling mode when calling for heat points at the reversing valve, while a unit that ices over and never clears points at the defrost control, sensor or board.
Running constantly on auxiliary heat is the expensive failure mode, because auxiliary strips are resistance heat and cost far more to run than the heat pump itself. If your electric bill jumped and the system seems to be working, that is often the reason and it is worth diagnosing rather than tolerating.
For repeated refrigerant leaks or a failed compressor on an older unit, replacement generally wins on total cost. See heat pump installation for what that involves.
Heat Pump Repair Services We Offer
✓Reversing Valve Repair
Diagnosis and replacement when a heat pump will not switch between heating and cooling modes.
✓Defrost Cycle Repair
Board, sensor and timer faults causing the outdoor coil to ice over and stay iced.
✓Auxiliary Heat Diagnosis
Finding why backup resistance heat is running when the heat pump should be carrying the load.
✓Refrigerant Leak Detection and Repair
Locating and sealing leaks rather than repeatedly topping up the charge.
Heat Pump Repair Cost in Springfield, IL
| Service | Typical Range | What Affects It |
|---|---|---|
| Diagnostic visit | $89 - $129 | Credited toward the repair |
| Capacitor or contactor replacement | $180 - $420 | |
| Defrost board or sensor replacement | $350 - $750 | |
| Reversing valve replacement | $900 - $1,800 | Replacement often better on older units |
| Refrigerant leak repair and recharge | $500 - $1,500 | Depends on leak location |
Ranges are typical for Springfield, IL and confirmed with an exact written quote before any work starts.
Pricing
Most heat pump repairs: $200 to $900, diagnostic $89 to $129