For both h/w and c/h the boiler will fire up for 3 seconds then stop for two seconds, fire up for 3 seconds then stop.. constantly. This appears to have occurred overnight. It is a Biasi Riva, five years old.
I replaced the h/w heat exchanger a year ago due to limescale, but even before then the c/h was fine and the problem was gradual.
Any ideas very welcome. Please post to group, I do not check that email address.
Many Thanks J
From cold, or only when hot?
If the pump had failed, then running for 3/5ths of the time would result in obvious boiling.
In message , Jon writes
Have you checked a) the temperature sensor, and b) that you don't have a blockage restricting the flow, or your pump has failed????
- From cold
- The flow is still good
- How do I check the temperature sensor
- How do I check the pump?
Thanks J
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