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I'm wanting to remove/clean/refit the water to water heat exchanger on my Worcester Bosch 280 RSF boiler (suspect poor heat transfer, boiler cutting in/out on demand). I'm struggling to find a specific gasket pack for the job (it's old now and exchanger type changed). I'm wanting to know my...

Combi boiler stopped working yesterday, will not fire up at all. Overtemp switch not activated and system pressure ok. Pump starts ok (I think thats what I can hear) but then nothing else happens. Think its the fan that's the problem based on fault finding guide. Nothing coming from flue (can...