i have a reillo rdb1 burner which keeps tripping out. serviceman has replaced fuel pump, but still burner runs for 5 mins then trips out sometimes it doesnt run at all and i have to keep hitting reset button.

derek, October 2009

Assuming your pump, filters and nozzle are in good condition, this is almost certainly a photo-resistance malfunction. This monitors the flame and trips out the burner controller if it can't see it shortly after ignition. You can't shunt it out, as it also checks your boiler is not on fire before allowing ignition. It may be as simple as needing the lens to be cleaned of soot or oil deposits, a duff connection in the controller or fitting a new unit. If your 'service guy'does not know this basic stuff about pressure jet boilers, change him out as well!

AlanB, October 2009

Could be one of three things :
1Capacitor fault
2solenoid fault
3Control box fault

Eileen andrew, October 2009

It depends on whether the entire boiler needs a good clean, but these Riello's have 2 faults: 1) The solenoid coil on top of the pump fails (my choice) 2) The photocell (inside the igniter box) tends to pack in.

John, October 2009