- Locate the blockage. This is likely to be where the pipe is most exposed, outside the building and probably at its end or at a bend or dip in the pipe where the condensate could collect and freeze.
- Thaw the pipe. You can use a hot water bottle or a microwaveable heating pack (the sort used for muscular aches and pains) or a cloth soaked in hot water. You can also pour hot, but NOT boiling, water onto the blockage, but remember that the water may freeze on the ground and make it slippery.
- Re-set or re-start the boiler. Once the blockage has cleared, check the boiler operating instructions or the manufacturer’s website for guidance on any action needed to clear the fault code or alarm and re-start the boiler. If it still doesn’t work, you should call a Gas Safe engineer to come and look at it for you.
Watch our video below that will help you thaw your frozen condensate pipe and watch how to prevent frozen condensate pipes here.