F76- overheat protection on primary heat exchanger triggered
check the water pressure
ring vaillant tech helpline 0845 6022922
they will explain reset procedure over phone
they will also advise if gas engineer required if reset procedure fails
Q, April 2015
New boiler its cover two years free repair by vailant
check fuse in PCB and connection ,make sure pressure is 1.2 bar min, press reset flam X SIGN on front cover to clear any fault signs
