Baxi Solo 3 Pilot Light Always On

[PlasmaMan13]

Hi Guys,

Got a problem with a Baxi Solo 3 PFL50
The "pilot on" light is on permanently
It was intermittent, but is now permanent

When this happened, the boiler would not go through the normal start-up sequence
Turn on the control and the 'boiler on' light comes on, but goes no further
I replaced the thermostat sensor, and it worked for three days, but that appears to just be a coincidence
I tried a new control board, but get exactly the same fault
Desperately need this running asap

Thanks

 

[Deleted member 120897]

Have you tested all basic electrical checks?

 

[PlasmaMan13]

Have you tested all basic electrical checks?

All basic electrical checks have been done
Overheat stat, stat sensor & pressure switch check out
So does the gas valve
Can't be potentiometer or on/off switch as new ones are on new board