Im not great with electrics but the pump is wired to an electical box in the airing cupboard along with the hot water cyclinder thermostat and water control valve, this then i believe gets fed to the boiler .
Not sure about the overheating as i can switch the boiler on for a couple of minutes...
Hey all, hopefully there is someone out there who may be able to help with my problem.
Moved in 2years ago and had to have the fan replaced to get the boiler working at all then about a year ago i had no hot water and had to have the water valve replaced as was locked in position. That cured...