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Fair enough... Basically we have a wireless thermostat and it was playing up, i.e. would turn off heating when up to temp but then wouldn't turn heating back on. I think it was the relay in the receiver. So thought I was being clever by just taking the receiver out and wiring around it so we at...

Hi, I stupidly applied 240v to 24v boiler circuit and blew the PCB. It had a big black burn on it, so I bought a new one and replaced it. However this has not fixed my issue, the boiler just doesn't turn on. I have checked and there is power to the PCB, the boiler is just not coming on. Nothing...