In message .uk, Ed
Sirett writes
On Thu, 23 Jun 2005 11:23:38 -0700, morganuk wrote:

My Puma 80 lights okay, heats up okay, but the pilot keeps going out
when we leave it for a few hours. It relights fine, but just relighting
doesn't cure it. Any ideas?

The fan has to keep moving slowly all the while or eventually the air
inside the boiler gets spent and the pilot goes out.

I expect either the slow speed resistor for the fan has gone open circuit
or the fan has become stiff and stops rotating when in standby mode.

The Puma PP doesn't have a slow speed fan resistor, it derives the low
fan speed voltage from a tapping on the primary side of the transformer

and yes, Puma fan bearings would appear to be a regular failing from
the number I get in for repair


--
geoff