Thanks for the post - there are no lights on this promax - just a reset switch.
If 'lockout' means it won't fire back up - then yes it locks out!
pump runs - stats are calling for heat - but until boiler calls down, it won't re-fire
Any advice please?
About 3 weeks ago, I noticed that my Potterton Promax boiler was switching off after about an hour - rads going cold. The only way to fire back up was on the reset on the front of the boiler at which point it would re-fire and then follow the same pattern.
Over the space of...