44
Keeprite
Secondary Limit or Condensate Overflow Fault
Furnace LED shows code 44; unit may shut down unexpectedly or not start.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Blocked condensate trap, Frozen or kinked condensate drain line, Tripped auxiliary limit switch, Heat exchanger over-temperature
How to Fix / Troubleshooting
Safety: Turn off power before working on condensate or limit circuits.
Steps:
- Inspect condensate system: Remove and flush the condensate trap. Clear any algae or debris. Ensure drain tubing slopes properly and is not frozen or kinked.
- Check auxiliary limits: Locate any secondary limit switches on the blower housing or near the condensate pan. Verify wiring connections are secure.
- Reset manual limits: If a manual-reset limit is present, press the reset button once. If it trips again, stop and call a technician.
Persistent secondary limit trips indicate airflow or heat exchanger issues that require professional evaluation.
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Repair Difficulty
Medium
3/5
Required Part
Condensate Trap
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