Hi. I have an issue with my Ideal Logic+ System S24 boiler which I hope someone can help with. Below is as much detail as I can think of.
The boiler has been running constantly (cycling?) 24/7 for the last few days, during the recent very cold snap and since.
HW and C/H are running fine, as per programmer and room thermostat.
However, instead of being in Standby mode when there is no call for HW or C/H, the boiler remains on.
Burner comes on and runs up to the flow temperature (usually set to about 65 degrees).
After a couple of minutes, burner stops. Pump remains on. Radiators remain cold.
HW cylinder is a Megaflow Indirect Unvented. HW remains hot (maybe hotter than usual but I may be imagining that).
During this 'cycling' there is a good deal of gurgling or hissing sounds from the boiler and you can hear the water in the flow/return pipes gurgling away too as though there's a good deal or trapped air.
Also, from time to time the boiler resonates with a vibration and sometimes goes into Fault F2 (Flame Loss) but recovers itself after 10 or 20 seconds.
The boiler is in an unheated garage with unlagged condensate pipework, so I checked for the obvious blockage of ice but the pipe is clear.
I first noticed this issue during the recent very cold snap and thought that maybe it was in Frost Protection mode, although I have not seen FP in the display. I don't know if it has a pipe thermostat for this.
Other things that may be relevant:
Boiler was recently serviced. No faults found, except for low pressure in internal expansion vessel. No settings altered.
Fernox recently applied due to a persistent loss of CH circuit pressure. Pipework leak suspected and Fernox appears to have worked. Not needed to repressurize since.
Due to garage location with flow/return pipework only partially lagged routed through loft space, I have installed a ceiling and insulated above and applied pipe insulation.
Ambient temperature in garage during cold snap was more or less as per outside temperature.
After insulating, still low during cold snap but not as low and assume frost protection may have still kicked in if fp thermostat located in garage (unknown).
I had hoped it would return to Standby mode since weather turned mild, but no luck. Boiler still misbehaving.
PS. We only moved into this property a couple of months ago, so we don't know the full history of the boiler or C/H & HW system and its design, nor why pipework wasn't properly lagged.
Any help gratefully received.
The boiler has been running constantly (cycling?) 24/7 for the last few days, during the recent very cold snap and since.
HW and C/H are running fine, as per programmer and room thermostat.
However, instead of being in Standby mode when there is no call for HW or C/H, the boiler remains on.
Burner comes on and runs up to the flow temperature (usually set to about 65 degrees).
After a couple of minutes, burner stops. Pump remains on. Radiators remain cold.
HW cylinder is a Megaflow Indirect Unvented. HW remains hot (maybe hotter than usual but I may be imagining that).
During this 'cycling' there is a good deal of gurgling or hissing sounds from the boiler and you can hear the water in the flow/return pipes gurgling away too as though there's a good deal or trapped air.
Also, from time to time the boiler resonates with a vibration and sometimes goes into Fault F2 (Flame Loss) but recovers itself after 10 or 20 seconds.
The boiler is in an unheated garage with unlagged condensate pipework, so I checked for the obvious blockage of ice but the pipe is clear.
I first noticed this issue during the recent very cold snap and thought that maybe it was in Frost Protection mode, although I have not seen FP in the display. I don't know if it has a pipe thermostat for this.
Other things that may be relevant:
Boiler was recently serviced. No faults found, except for low pressure in internal expansion vessel. No settings altered.
Fernox recently applied due to a persistent loss of CH circuit pressure. Pipework leak suspected and Fernox appears to have worked. Not needed to repressurize since.
Due to garage location with flow/return pipework only partially lagged routed through loft space, I have installed a ceiling and insulated above and applied pipe insulation.
Ambient temperature in garage during cold snap was more or less as per outside temperature.
After insulating, still low during cold snap but not as low and assume frost protection may have still kicked in if fp thermostat located in garage (unknown).
I had hoped it would return to Standby mode since weather turned mild, but no luck. Boiler still misbehaving.
PS. We only moved into this property a couple of months ago, so we don't know the full history of the boiler or C/H & HW system and its design, nor why pipework wasn't properly lagged.
Any help gratefully received.
