Boiler problem?

potterton puma 80
GCN 47-590-10
DHW OK
NO CH
does the boiler have an internal timer?
[electromechanical PUMAPROGM or electronic PUMAPROGE]
or does boiler have an external timer? [& room thermostat?]
the timer [& the room stat] can be tested from the terminal block on the boiler to check which component is faulty
[installation manual
page 14
section 1.10
fig 12]
if internal or external timer are faulty its possible to link out & bypass faulty component to give you CH on a temporary basis until new part fitted
if timer & roomstat have been eliminated as possible causes of CH failure we are now looking at internal components inside boiler
there are a number of LED lights on the boiler & PCB
depending on which LEDs are lit it is possible to deduce which component might be faulty
otherwise its a case of testing all the components involved in the ignition sequence to find the fault
not within your abilities
competant gas engineer reqd

manwithnoname
April 2012

Check pressure, check thermostat

SD
April 2012