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Will try and clean out the flowswitch tonight when I get home. If that doesnt do it, then I assume I will have to call out a plumber to check the thermister or PCB 38/40 (?). Thanks for advice will let you know what happens.

Ideal Combi Boiler Response 80 Currently I cannot get any hot water unless the heating is switched on. I am assuming the boiler is quite old and was already in our house when we moved in. I have checked that all the stop cocks are fully open. The pressure is at 1.5bar as recommended in...