potterton performa 28 fault

[theheatinghelper]

heating and h/w tries to kick in but 60 light stays on , indicates pump but the pump is spinning but ...the fan dont kick in pressure switch seems to be working fine ...... im undecided on a new pcb or a new fan
any ideas all ??

thanks

 

[picasso]

Check the primary flow switch is making when you run the hot water or central heating.

 

[theheatinghelper]

it is mate

 

[picasso]

Any power to the fan ?

 

[theheatinghelper]

I'll be honest , I only had a neon at hand and there was no power at the fan it's self

 

[picasso]

Whats the system pressure ? even if it reads 1 bar let some water out the system (or top it up) to make sure the gauge isint stuck