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New PCB arrived. When I took the old PCB out it had scorching by the fan relay on the PCB. Boiler now fully running. Thank you for your assistance.

Thank you for the advice everyone. I will report back tomorrow on whether it is fixed.

With a multimeter with one probe on neutral and one on the coloured cable.

I emailed Ideal how provided incorrect advice that it was the air pressure sensor - I have definitely proved this is not the case. I suspected the PCB and spoke to a company who refurbish PCB's. They say the key failure of the PCB is the fan relay. I have some blackening on one set of...

I have been working through the fault finding guide. The fan does not start if I remove the stat, as Ideal say it would. They then ask for the supplies to the pressure switch to be checked, looking for power on the violet and red leads - which I have. The fault finding guide then just says...

Thank you for the reply. Yes there is. I have pressed it, but it has not helped. There is power on both terminals of it.

Hi, I have an Ideal Classic Boiler which has been very reliable other than one fan replacement in its life. The Boiler will not currently fire. I hear two relays click but the boiler fails to fire. I initially thought it needed a new fan but checking voltages no power is being received by...