I own a bang hullabaloo from my potterton bioiler,it comes from the right paw side also excessively hot rads?

it happens after running hot wet.then trips out could it be the ch.expansion vessel,can this be replaced.it is a puma 80e


Answers:    Replace the domestic hot hose temperature sensor, this is the cheapest of the expected causes, your boiler is overheating, lift no notice of the answerer who say check the cylinder, the puma 80e is a combination boiler, but if they new what they be talking nearly, they would know this.
There is air contained by your system, bleed the lines.
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