Profile 80 ign problems

[Andysparks]

Hi can any one help with profile 80 which seems to receive click from pcb and fan starts then the process repeats over and over again.

I am an electrician and have checked for voltage on gas valve during fan / clicking 0volts. when i hit the gas valve louder click 240v on solenoid and fire up for about 1 hour then i have to wack the valve again.

Sounds like gas valve or pcb both v v expensive any help to narrow it to either would be great

Thanks

Andy

 

[gas4you]

If you are only tapping the gas valve I would suspect this.

Try tapping any relays on the pcb, if this makes it come on then suspect pcb first.

 

[Andysparks]

Thanks

Just checked again. I think just chance that by hitting gas valve with end of golf umbrella not helping but there is 0 volts on solenoid during all of this untill 240 applied .

How about if i apply 240v from other source during fan and click cycle and see if boiler fires.

Cant see any relays as pcb is enclosed within plastic shell.

 

[ollski]

If the fan starts up for a couple of seconds then drops out and keeps this cycle going a few times before it ignites it's the pcb, probably do 3 or 4 a week for it.

 

[bengasman]

Several Potterton models are overly sensitive to poor earth.
Would I be correct to guess that earth to your boiler leaves room for improvement? Ditto for supplementary bonding? Cobbler’s kids and such…..

 

[namsag]

As ollski says classic PCB failure symptons for a profile