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Mend Baxi WM 50/4 PF Switch Pilot Light Going

has my pressure switch gone on my baxi solo wm 50/4 pf?

my pilot light is going and the fan kicks in ok but no main burners ignite. I have replaced the solenoid and gas valve as per the baxi fault finder but i'm thinking now its teh pressure switch. anyone any thoughts?

Simon
October 2007

Baxi Baxi WM 50/4 PF Heating, Convector Heaters Switch Pilot Light Going

Just had a flame failure problem on BAXI MAIN 24HE,changed electrodes no fix.
Engineer changed air pressure switch BAXI 5112999
Working ok.This boiler leaked through seals from flow and return pipes after 6 months .The heateam engineer explained that it was a common BAXI problem where the sealing washers go brittle !!!!!! Nice one BAXI

mrfixa
June 2009

also its not a dedicated pilot on these is it,its electronic ignition so no pilot should be there as such.possible electrode? if you can hear the boiler trying to ignite id change pilot assenbly including electrode.if not look at air pressure switch tubes,air pressure switches rarely fail

reuben
November 2007

check the hoses to the air pressure switch,they are renowned for going brittle and splitting.
happened twice in two years for me.causes air leak and air pressure switch not activating then no ignition.

reuben
November 2007

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Baxi WM 50/4 PF: No Burners - Pressure Switch?