Morning all 
I've got a pretty fancy (I think) unvented CH/DHW system powered by a 2001 Oil-fired HRM Wallstar 15/19 Boiler.
I've asked some separate questions about it in another thread, but now, much more urgently, the thing has stopped firing up!
Some key facts:
- There is no room thermostat. I call for heat directly using the programmer (pic below).
- I think it gave up mid-cycle last night, during a 90 min run for both hot water & CH (not certain, might have been just after the cycle ended)
- The oil in the tank is 3/4 full, checked for certain.
- The boiler has two indicator lights, a 'normal' orange light and a red 'lock out' (I think) light. The red light does not come on. So boiler does not appear to think lock out is necessary. With the cover off, pressing the reset button does nothing.
- I have electrically reset both the boiler and the programmer, no change.
- When the programmer calls for heat, the CH pump starts up as normal, and the boiler orange light comes on, as normal. But there is no other sound at all from the boiler (no clicking, no firing, just zip).
- Boiler was last serviced in May
- No obvious smoke from the flue
- It may have been a co-incidence, but last night, shortly after I noticed the boiler had stopped, I noticed our water softener was hissing too.
I was tempted to slacken the brass valve on the underside of the boiler to see if it'll release any trapped air, but on second thoughts, if an air pocket was the problem, wouldn't the lock-out light be on?
I Also thought that it could be the 'call' for heat at fault, but then I can see that the boiler DOES receive the call, because the orange light flicks on.
Any thoughts greatly appreciated....!!! I can't get a plumber out here until nearly the end of the month (although I havn't yet claimed this to be an emergency).
Pictures of the boiler, of the programmer and of the unvented cyl below to help
Cheers,
Tom
I've got a pretty fancy (I think) unvented CH/DHW system powered by a 2001 Oil-fired HRM Wallstar 15/19 Boiler.
I've asked some separate questions about it in another thread, but now, much more urgently, the thing has stopped firing up!
Some key facts:
- There is no room thermostat. I call for heat directly using the programmer (pic below).
- I think it gave up mid-cycle last night, during a 90 min run for both hot water & CH (not certain, might have been just after the cycle ended)
- The oil in the tank is 3/4 full, checked for certain.
- The boiler has two indicator lights, a 'normal' orange light and a red 'lock out' (I think) light. The red light does not come on. So boiler does not appear to think lock out is necessary. With the cover off, pressing the reset button does nothing.
- I have electrically reset both the boiler and the programmer, no change.
- When the programmer calls for heat, the CH pump starts up as normal, and the boiler orange light comes on, as normal. But there is no other sound at all from the boiler (no clicking, no firing, just zip).
- Boiler was last serviced in May
- No obvious smoke from the flue
- It may have been a co-incidence, but last night, shortly after I noticed the boiler had stopped, I noticed our water softener was hissing too.
I was tempted to slacken the brass valve on the underside of the boiler to see if it'll release any trapped air, but on second thoughts, if an air pocket was the problem, wouldn't the lock-out light be on?
I Also thought that it could be the 'call' for heat at fault, but then I can see that the boiler DOES receive the call, because the orange light flicks on.
Any thoughts greatly appreciated....!!! I can't get a plumber out here until nearly the end of the month (although I havn't yet claimed this to be an emergency).
Pictures of the boiler, of the programmer and of the unvented cyl below to help
Cheers,
Tom
