Boilers · Homeowner answer
What should I do if my condensate pipe freezes?
Short answer
Find the plastic condensate pipe running from the boiler to an outside drain, pour warm — not boiling — water along it until the ice clears, then reset the boiler.
What changes the answer
- how much of the pipe runs outside
- the size of the pipe
- how exposed the run is
What you can check yourself
- check the boiler display for a condensate fault code
- check the end of the pipe outside for ice
What to do next
If it happens every cold snap, the pipe can be re-routed or upsized and insulated so it stops happening.
This page gives general information only. Christy needs to see your system — in person or from your photos — before he can give you firm advice or a price.