S
Staffy77
I had to change the water pump due to the connector burning out and was tripping my fuse box. The boiler now works for DHW and CH but once the demand stops, LED 4 flashes / goes into standby mode for 2 mins, then resets and all functions can be used again.... Any ideas what I should check? PCB seems OK, pump is running fine, there are no solder issues, relays seem to be working fine, pressure is good.