Utica
Cold Weather / Freeze-Related Issues
Boiler frequently locks out during very cold weather, then restarts after reset
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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
Frozen condensate line, Intake or exhaust blocked by snow, Low gas pressure in extreme cold, Outdoor sensor misreading
How to Fix / Troubleshooting
Safety first: Turn off power and gas before working outside in contact with venting or condensate lines.
- Check vent terminations: Clear snow and ice from around the intake and exhaust terminations. Maintain clearances recommended by Utica.
- Inspect condensate line: Ensure the condensate drain is not routed through unheated spaces where it can freeze. Thaw gently if frozen and reroute or insulate as needed.
- Monitor gas supply: If other gas appliances also struggle, contact your gas supplier about low pressure.
- Outdoor sensor: Verify the outdoor sensor is not exposed to direct sun or other heat sources that could cause misreading.
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Repair Difficulty
Medium
3/5
Required Part
Condensate Drain Line
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