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Cheers! I've ordered a heater control valve for £13 of ebay - cheaper than yours at current exchange rates! Access seems fine with the bulkhead plastic out of the way. This is a 2006 car, so hopefully the pipes haven't become too stuck to the valve. Meter was reading low battery on closer...

I've just checked my coolant valve for the same reason. I've checked the voltages at the terminal entering the solenoid, and it seems to be varying between 7 and 15V, that is, turned to hot (I think) it stays around 15V, turned to cold (or opposite) it sits around 7V and in between it switches...

Much thanks to HITGAS and misterdubya for clear instructions. Twenty minute job this morning (including the replacement of the condensate trap, disconnected last year because of a rust short across the contacts). The diaphragm was perished and slimy so I'm guessing it had become porous or...

Hi! Main Combi 24 HE I had one of these fitted around five years ago, and it's been fine until recently when the DHW became erratic; CH is still fine. Initial symptoms were that hot water was only available when the CH was actually firing. I opened the case and saw that the pushrod on...