Bolier turning on and off constanly - Baxi

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Karatekid

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Hi all

My 4yr old baxi boiler turns on and once it's reached the thermostat temperature it starts to turn on and off every 5 secs. The pilot light turns off and then you hear it fire up, turn off, fire up, turn off. This continues until I turn it off and let it cool down. It has a separate water pump (GRUNDFOS CONLIFT 1 LS CONDENSATE) which I haven't heard turn on in a while. Not sure if this issue is due to the pump or thr boiler itself?

Attached is a video
 

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  • 20210414_203236.mp4
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What happens if you turn the thermostat down after it’s finished still does it ?
 
ShaunCorbs said:
What happens if you turn the thermostat down after it’s finished still does it ?
Click to expand...
Yes even if I turn the thermostat off or even remove the batteries it carries on doing it until I turn the boiler itself off. When the thermostat turns off the bolier, under normal operation after reaching temp, he bolier carries on for about a minute before turning off. Its like a 1min lag. But at present it just carries on
 
Would phone baxi up as it’s a platinum so 10 year warranty
 
Pour some water into where the white pipe goes should turn on and pump it away
 

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