Grant Vortex Oil Combi boiler spares help

Grant Vortex Combi Oil boiler.

Fault is the boiler fires once radiators warm up, boiler shuts off then radiators go cold.  Go outside to boiler (it is an outdoor model) lights are normal indicating "demand" but no pump and no burner on.

Turn the thermostat knob on the boiler down then back up, boiler fires up again for one cycle then does not come back on unless you repeat with the thermostat knob.

Hot water functions still working normally.

On this one the thermostat knob drives a potentiometer on the one and only circuit board.  My guess it is probably one of the relays not working and I suspect the only cure is a new board.  If only I could find one.

Pictures including numbers:









Any idea where I might get one?

Lucky dip on e-bay?

https://www.ebay.co.uk/itm/Grant-Temp-Control-PCB-428900-SW-U5-V1-0-M422268-10130-CI-1SS/254768602671?hash=item3b51645e2f:g:anMAAOSwWX1fortz

Geoff1946 said:

Lucky dip on e-bay?

https://www.ebay.co.uk/itm/Grant-Temp-Control-PCB-428900-SW-U5-V1-0-M422268-10130-CI-1SS/254768602671?hash=item3b51645e2f:g:anMAAOSwWX1fortz

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Thanks.  I had tried lots of combination of Grant, Vortex, Board etc on ebay and not found that one.

I await now to see if the customer wants to take that punt.

ProDave said:

Thanks.  I had tried lots of combination of Grant, Vortex, Board etc on ebay and not found that one.

I await now to see if the customer wants to take that punt.

Click to expand...

Too late I'm afraid. E bay just e-mailed that it's sold.  I was hoping it was you.

Geoff1946 said:

Too late I'm afraid. E bay just e-mailed that it's sold.  I was hoping it was you.

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Yes that was me, all the numbers match and the customer was happy so I ordered it.

Just annoyed that I did not find it earlier myself so thanks again for your help.

Sheer luck. Glad to help.

What are the chances of that??

well done that man!