potterton puma 80

[ando3000]

I have a normally working potterton puma 80 boiler
woke up this morning, all normal except no heating!!
pressure normal, hot water normal. when switch on boiler switches on for 20 seconds then switches off burners.
I'll freeze tonight unless you can help me in the right direction.
[one thing i remembered, pilot light went out sun afternoon, relit normal.
could this relighting switch be faulty, ie not 'releasing' far enough
phil

 

[kevplumb]

is the pump running

 

[ando3000]

yes

 

[kevplumb]

does it fire normally when running the hot water

 

[ando3000]

absolutely!

 

[kevplumb]

diverter valve could be stuck in hot water position

 

[ando3000]

i'll try that thanks, any other ideas please let me know.

 

[ando3000]

thanks
have sorted problem.
we found a small drip on one of the hot taps. this was not enough to light the 'demand' light, but enough to stop Central heating from working!
fixed tap, now working...
I appreciate your efforts, an excellent forum!

 

[PEDANTICVINDICTIVEMAN]

Who was this drip next to the tap, husband/wife/mum/dad/brother/sister