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HOW CAN I FIX MY VAILLANT COMBI BOILER?

WHEN TURNING ON HOT WATER THE BOILER FIRES UP THEN AFTER 10-20 SECONDS THE BURNER GOES OUT AND THE RED BURNER LIGHT WITH A LINE THROUGH COMES ON AND I HAVE TO RESET THIS HAPPENS EVERY TIME WHY?
SIMON, July 2005
Possible flame rectification problem. could be electrode or poss PCB. Ouch!

craig, August 2005
link Click here to see other fixes for Vaillant.