Potterton Pr1ma F - not lighting after 'holiday'

[nickmanning]

HELP! Newbie here. I have searched extensively for a user manual for the Prima F series of Potterton boilers - but there is no trace on the internet.

I have recently returned from holiday, during which time my digital clock was set to 'holiday' where the boiler would not be used. Now returned, the Prima F boiler will not light. I have the wall mounted room theromostat on high, and water heating on, but the boiler refuses to light.

Having removed the protective panel I see no evidence of a reset switch to resart the boiler, or to reignite the flame. Gas and electricity supplies seem in good order - so my problem remains.

Do anyone have any guidance?

 

[ChrisR]

Reset switch is underneath. I'd use a meter or neon screwdriver to see if the Switched Live terminal is live, which should bring boiler on.

Pump sticking/failing is a longshot - boiler would overheat and switch itself off.