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Discuss Ideal Isar HE 35 cutting out in the Central Heating Forum area at PlumbersForums.net

Sandeep89

Gas Engineer
Messages
60
Hi Guys,

Customer has a Ideal Isar HE35 when the boiler fires up for ether hot water or heating, there is knocking noise which seem to he coming from inside the flue manifold.

Boiler fires up, knocking noises can be heard from some seconds, after this the boiler cuts out and water squirts out of the AAV. The boiler then re-fires itself after a little while and the same thing happens again.

Any ideas what could be causing this.

Thanks
 
its about time for a new boiler, they where never the best, poss blocked return pipe?
 
I also noticed that the pressure gauge is rapidly moving up and down whilst the boiler is working, is it meant to be doing this
 

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