Boiler fires up for 20-30secs then switches off and then fires up again. It does this continually.On/off on/off all the time. This happens with both hot water and central heating. Any ideas on what is causing this would be appreciated.
ACOperson said:Fan venturi
ChrisR said:20 - 30 seconds is a bit slow for the average aps
How long does it stay off before it has another go at lighting? Couple of seconds? Half an hour??
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