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Make sure both valves are open, if that fails sounds like it may need removing from wall and flushing through.

Maybe pump related, check to see if the trv's are free and not stuck down, sounds like you need an engineer to rectify.

No Trace they don't. The potterton Profile has electronic ignition and flame sensing via it's pcb. So no thermocouple on that boiler

Isolate cold supply to boiler at inlet valve, see if pressure stays stable. i.e. you still have the heating system pressure at 1.5 bar but have turned the cold mains off to boiler(or use your main stop cock) if this solves the problem you need a new heat exchanger. Alternatively it may be...

Sounds like your filling loop is either not turned off or letting by

Only change the pcb if the poor ignition is causing you alot of probs, as I said it gives 5 ignition attempts including purge times so it overcomes the damp oxide probe scenario. about £75.00 for the pcb( it is their pcb 41 part number 172853) Make sure your spark gap is 5mm and the...

Ahhh the Minimiser, when was it last serviced PROPERLY, it is a condensing boiler and suffers with a build up of ally oxide in the heat exchanger, this causes problems with ignition and detection if not thoroughly cleaned yearly. Ideal have a new pcb for the boiler (which I have fitted on...

Ideal are about to launch a new range of high efficiency boilers at the end of this month. Isar 120 with remote spark ignition, new ignition kit and enhanced pcb. Mini 32kw this should be a good seller as the price is very competetive. Istor an unvented cylinder kit to go with the M...

We have been fitting the Ideal Isar condensing combi recently and they are an excellent all round boiler. We have fitted about 15 of them and so far had no probs at all, typical flow rates at a 35 deg rise are 12litres per minute. It is fully modulating and able to fit in a cupboard with no...