Search results

Hi, wonder if anyone can help. Its Boxing Day here in the frozen north (Northumberland) and I can't get the boiler to fire up. Not good. Was okay last night but wont fire this morning. When timer is calling for the boiler to fire, the fan starts for a second and runs but immediately...

Jerry, The problem appeared to be that the pilot flame confirmation back to the PCB (via the HT lead) was poor or intermittant. This causes the PCB to think that the pilot has gone out and interrupts the 240v to both the Pilot SOV and the Main SOV, hence the burner goes out momentarily and then...

I think that may be the answer. I unplugged the pilot Sov terminal whilst the boiler was firing normally and the fouth neon went out, the main gas valve closed and the boiler ignition system continued to try and light the burner. So I'll replace the pilot SOV coil next week and see what happens...

Hi ollski. The 240 volts are ok to the pilot SOV coil. (ie the voltage is not on / off the way the volts to the main SOV is) .. If it was the pilot sov coil itself that was dicky, and it was dropping out whilst the main gas burner was firing, would that still intermittantly have an effect on...

Dave, checked out the APS and 240v is always present on the correct c/o contact when the boiler is firing normal. When the intermittant firing starts there is no difference. I.E I am assuming that if the APS was dicky, you would lose the 240v to the n/o terminal. Everything else seems to be...

Help!! Fitted a complete new PCB and unfortunately after about 5 mins or so when the boiler gets roughly up to temperature the intermittant firing returns. What else would cause intermittant loss of voltage from the PCB to the Gas valve. Each time the firing stops this is preceded by the...

I have a problem with intermittent firing on a Ultimate 50FF boiler. The boiler starts up ok as normal, comes up to temperature ok and starts to heat up the radiators / HW, with the burner cutting off / on as normal. After about 20 mins or so the main burner cuts out and immediately re ignites...