Old worcestor 28 junior.... Try's to spark for 2 secs goes to lockout...

[moony]

As title...

Only try's for 2 seconds goes to lockout?

 

[gasmanrob]

Try's to spark or sparks for 2 seconds?

 

[moony]

Sparks, clicks and you can see the spark bud

 

[Ermintrude]

What's de gas and fan doing

 

[moony]

Fan is running, aps is making, sparking for literally 2 secs and going to lockout straight away

 

[anz]

100% sure low pressure switch, link it out to prove fault.

 

[Killy Bing]

100% sure low pressure switch, link it out to prove fault.

Linking it out would send it to fault?

the board checks the aps if its proved or not, then runs the fan, then proves the fan runs.

I suppose you could link it out after the fan starts running

 

[anz]

Not the aps, the system pressure, low pressure sensor.

 

[Killy Bing]

Not the aps, the system pressure, low pressure sensor.

duh!! Silly me

 

[gasmanrob]

Sounds like a possible earth fault

 

[IDCHAPPY]

100% sure low pressure switch, link it out to prove fault.

This, identical situation about 2 months ago

 

[moony]

Cheers lads...

 

[Nostrum]

I've had this fault and I pulled the 20 pin connector off, gave it a blow out and pushed back in and hey presto.

 

[moony]

Where is the low pressure switch ? I've looked in the book and can't see it ?

 

[anz]

Top of heat exchanger, on the right.

 

[moony]

Cheers for your help bud

 

[anz]

You might find that it's blocked with sludge, resulting in it not reading the correct pressure.
If this is the case, you can take it out, give it a good clean and it should be OK.

 

[moony]

Cheers bud.