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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
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