Worcester boiler with F0 fault

[moonlight]

I just had a call from a new customer, the boiler a Worcester 32cdi boiler is not working, hot water or heating. He told me it has an F0 fault. I looked at the manual in the office and it suggests a internal fault. He said the boiler blew the trip switch. I am going to the property on Wednesday what would you suggest is the possible problem? I will be contacting Worcester tech while I am there. Thanks in advance.

 

[ShaunCorbs]

If it’s blowing the rcd have a look at the pump / diverter / cold flow switch

 

[moonlight]

If it’s blowing the rcd have a look at the pump / diverter / cold flow switch

I thought it maybe the pump. That draws quite a bit of electricity. But shouldn't the fuse have blown on the circuit board?

 

[ShaunCorbs]

The fuse is only there for overcurrent the rcd will trip first

 

[moonlight]

Just an update on the boiler, pcb fault. Bad news you need the whole control box as parts are integrated. Another reason to dislike Worcester boilers. Roughly £350 + vat for the front panel.