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Thanks again. Like you, I'm not entirely sure that the thermocouple problem is directly related to the overheating. When the last plumber replaced the fan he left us for a couple of week with no boiler and everything was removed fom the front. I took the opportunity to give it as best a...

Peter, The flow pipe runs across the bottom of the pump and the bleed screw is at the top.

Thanks for your response. No I have never balanced the radiators as I'm not sure what it means. I did request a plumber to do it some time ago when he was charging for every part of an hour and he went just over the hour so i made him stay. if you see my earlier desperate attempts for...

I was feeling around in the cylinder cupboard when I came across the instructions for the pump. It syas that it should be installed with the propellor shaft horizontal. the original pump was installed vertically and the new (identical) one is also installed vertically. Could any of this be...

Apollo Fanfare boiler, open system. Lots of problems over the years but I've now had the floorboards up this week to trace the problem. The flow pipes get hot quite quick and just keep getting hot. The radiator return pipes seem to take an age to warm up on every one of the radiator feeds...

The gas valve is a green square button (the pilot light ignition is a round grey button) Waiting in anticipation...

Thanks for the response. The header tank appears to be working fine to me and as I said the pump is brand new. When I bleed the rads the water is very clear (probably as a result of all my earlier attempts at flushing the system). The feed tank empties quite readily and refills OK when I let...

Long standing problem requiring long explanation I have an open system with an Appolo boiler and a thermocouple which includes the interuptor wires. The heating system has always been prone to the occasional loud bang and every now and then, say twice a year the pilot light would go out and...