Potterton prima 30F

[broxy]

The blighter has been working this afternoon but now wont light, Thermostat asking for heat but nothing, no starting cycles just seems dead.
Any ideas chaps.

 

[seco services]

has it tripped ?

 

[kevplumb]

na it was pushed

 

[broxy]

has it tripped ?

If you mean the little switch below the boiler stat, yes it has but still not working.

 

[kevplumb]

no lights no noise nothing ?????

have you checked the fuse

 

[broxy]

Just managed to light it on hot water I think it may be the actuator on 3 port valve as it seems pretty hot and switched manually to heating.
Does that seem viable.

 

[bengasman]

It's possible.

 

[seco services]

that wouldn't of tripped the boiler.

 

[broxy]

that wouldn't of tripped the boiler.

I take it's the overheat stat thats on the bottom of the boiler?, would the actuator failing not cause the overheat stat to cut in, especially if it failed opening or closing causing a restriction.

 

[seco services]

it wouldn't cause a restriction one port is always open on a 3 port.

 

[bengasman]

Bit of a long shot, but it could be something like the valve switch not corresponding with the physical position.
More likely to be the heating side having to much resistance for the pump; just about keeps going on dhw through 22/28 mm, but can't overcome the 15 mm and valves.