How can I fix my Potterton Boiler - Prima F, model EP 2002? Its Central Heating and Hot Water functions suddenly failed to perform last night. Notably, the flame fails to light/rekindle itself as it used to do when switched on, and only did rekindle itself, eratically, thrice within the past twenty-four hours. It seemed to be making efforts to rekindle itself as evident in some clicking sounds coming out of the yestem mounted on the wall in the kitchen. Please help urgently.

A A Adeniran, October 2006

The boiler of a friend broke down last week and I got it up a running in a couple of evenings. The first to check everything and then to follow the fault diagnosis in the installation manual. The diagnosis was to replace the PCB (printed circuit board), which cost about £100+VAT. This was purchased the following day and that evening the PCB was replaced with the new one.

Once done it failed to fire although the PCB was working as the diagnosis changed slightly to the fact that the fan had stopped working. Once the internal elements of the fan had been spun round the boiler fired and has worked perfectly ever since (touch wood). This was a Prima F of about 10 years old.

If you have the installation manual it has a fault diagnosis table in the back. You will also need a voltage test meter.

Good luck

Dave Kildare, October 2006