boiler fan runs but fails to ignite,replaced pressure switch still not fireing up.
if i switch pressure switch manually it fires up any help would be great
thanks dave have replaced the rubber tubes but still the same,would the pcb at fault and not reciveing a signal that the switch is open as i am getting 120v at both terminals
john, February 2010
check the rubber tubes between the a.p.s. & fan they may be kinked or damaged or even the little plastic elbows that the tubes join to. also external flue fault or even if the flue restrictor is still on
it seems the a.p.s. is not sensing airflow
