Step 1 – It’s possible that your boiler’s condense trap/discharge pipe has frozen if all 3 of these statements are correct:
The outside temperature is or has been below freezing
Your boiler is displaying either an EA fault code, a D5 code or is displaying a flashing blue light (for 26CDi boilers you may see a flashing red light instead)
Your boiler is a Greenstar gas boiler, or a 26 CDi
Step 2 – If all 3 statements are true, you should now try to reset your boiler. This can be done by holding in the ‘reset’ button (this can be found on the boiler control panel) for 10 seconds. Once you have released the button you should wait 2 to 3 minutes to see if the boiler re-fires.
Step 3 – If the boiler does not re-fire and it is emitting a gurgling sound, then it is almost certain that your condense is frozen. If you cannot hear a gurgling noise you should still proceed to check your condense pipe.
Step 4 – The condensate pipe is a plastic pipe (black, white or grey), coming from the bottom of your boiler. If this pipe is less than 32mm in diameter and runs outside of the property or through a non-heated area then it should be fully insulated with waterproof lagging. If it is not fully lagged and the 3 criteria (in step 1 above) apply then it is likely that it is frozen and needs to be thawed.
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Discount Domestic Heating (DDH) have over 30 years experience. We have created this blog to help people to fix little plumbing jobs for themselves, instead of paying a plumber like us to come out for a one minute job that could cost you money for a simple fix. If you have any issues with your central heating, thermostat, boiler, radiators, etc… Please feel free to ask us a question here, as we maybe able to tell you how to fix the problem or if it is a bigger problem we can come out and give you a quote, if you would like one.