Our old Glowworm EnergySaver60 has started to make a rather alarming 'whumph' sound when the burner lights.
This only happens when the boiler has been running for a while and has then been shut down for 30 mins or so (once the house thermostat stops calling for heat). Upon the thermostat calling for heat again, the 'whumph' noise occurs. It's like the normal sound of the burner lighting but is about 10 times louder.
The noise does not occur if the boiler is started from cold (ie in the morning after being shut down all night) or if it has only been shut down very briefly (ie when the internal thermostat switches the burner off because the return temp is high enough).
My guess is that either the electrode is on its way out or that the corrosion in the condensation tray has finally pinholed the tray and is now leaking onto the burner.
Anyway, if it's the electrode, I'll have it repaired. If it's the condensation tray, it's time for a new boiler.
Which leads me (finally) to the question. If I'm looking for a decent vented system boiler, would the WB 18ri or 24ri be okay?
Also, since there is very little priice difference between them (and theyboth modulate down to a similar output level) is there any reason not to go for the 24ri?
The Glowworm is an 18kW boiler but we have only had to run it in summer mode up until now this year (8kW).
FYI, we are happy to keep the vented system and there is no real advantage in a 'system boiler' within our installation.
Cheers,
iep
This only happens when the boiler has been running for a while and has then been shut down for 30 mins or so (once the house thermostat stops calling for heat). Upon the thermostat calling for heat again, the 'whumph' noise occurs. It's like the normal sound of the burner lighting but is about 10 times louder.
The noise does not occur if the boiler is started from cold (ie in the morning after being shut down all night) or if it has only been shut down very briefly (ie when the internal thermostat switches the burner off because the return temp is high enough).
My guess is that either the electrode is on its way out or that the corrosion in the condensation tray has finally pinholed the tray and is now leaking onto the burner.
Anyway, if it's the electrode, I'll have it repaired. If it's the condensation tray, it's time for a new boiler.
Which leads me (finally) to the question. If I'm looking for a decent vented system boiler, would the WB 18ri or 24ri be okay?
Also, since there is very little priice difference between them (and theyboth modulate down to a similar output level) is there any reason not to go for the 24ri?
The Glowworm is an 18kW boiler but we have only had to run it in summer mode up until now this year (8kW).
FYI, we are happy to keep the vented system and there is no real advantage in a 'system boiler' within our installation.
Cheers,
iep