Condense Pipe Frozen? Here’s What To Do

By JR | Blog

Identify A Frozen Condense Pipe

If temperatures drop to freezing and remain there for a day or two, some boilers may suffer from a frozen condense pipe. This is likely to be the case if your boiler has stopped working and:

The outside temperature is below freezing and has been for 24 hours or more.

The condense pipe from your boiler (the white plastic pipe that connects the boiler to a drain or soak-away) is outside.

The external condense pipe is 22mm in diameter (though it can also happen with bigger pipes in very cold weather).

The boiler tries to start but quickly stops or locks-out.


How To Thaw The Pipe

Use one of these methods to safely thaw your condense pipe:

Pour warm water on the frozen condense pipe. However, do not attempt this if the condense pipe is located above ground level, and do not use boiling water, only warm water.

Put a hot water bottle onto the affected pipe.

Get a heat wrap and wrap it around the condense pipe. These are usually used to treat muscle injuries and you can buy one from your local pharmacy.

Once your boiler is running again, contact your installer to check it is all working correctly. They can also advise you on insulating the pipe to prevent this problem occurring again.

The following video explains in more detail:

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Does My Boiler Have A Condense Pipe?

Boilers older than 15 years usually do not have a condense drain pipe.

A recent, modern boiler will either not have an external condense pipe or the external pipe will be 25mm (1 inch) or more in diameter, meaning it’s less likely to freeze.

If you’re not sure, contact us and we can advise you.


A Solution For Preventing Frozen Condense Pipes

Boiler manufacturer Worcester Bosch has launched its CondenseSure product, which protects your external condense pipe and prevents it from freezing. We can fit one of these for you. Give us a call to arrange it.

If you would like help to ensure your heating system is working properly or to fix your frozen condense pipe, our team of heating and plumbing engineers are available to help. Call us 020 8462 8822 or request a callback to arrange a visit.