Hi,
I have an Ideal ICOS HE15 boiler which has been regularly serviced and worked fine for around 7 years. It still works fine its function as a water heater, however the central heating system as a whole has recently developed an odd quirk, namely that the boiler still continues to burn gas periodically even after the central heating controller/programmer has finished its cycle. The radiators go cold, suggesting the pump has correctly been turned off (which presumably means the external CH controller is not faulty), but the boiler continues to display 'C' and periodically fire up.
This happens most of the time (80%), but sometimes the boiler shuts down as expected and returns to '0'. When it doesn't shut down, I'm forced to turn the power off at the wall to prevent the boiler burning through gas unnecessarily.
I intend to call someone to inspect and fix this fault, however I would like to gain a rough idea of what is wrong just in case there is a simple fix, or in case the engineer suggests replacement of a part that is probably not at fault.
Thanks in advance, all comments welcome.
I have an Ideal ICOS HE15 boiler which has been regularly serviced and worked fine for around 7 years. It still works fine its function as a water heater, however the central heating system as a whole has recently developed an odd quirk, namely that the boiler still continues to burn gas periodically even after the central heating controller/programmer has finished its cycle. The radiators go cold, suggesting the pump has correctly been turned off (which presumably means the external CH controller is not faulty), but the boiler continues to display 'C' and periodically fire up.
This happens most of the time (80%), but sometimes the boiler shuts down as expected and returns to '0'. When it doesn't shut down, I'm forced to turn the power off at the wall to prevent the boiler burning through gas unnecessarily.
I intend to call someone to inspect and fix this fault, however I would like to gain a rough idea of what is wrong just in case there is a simple fix, or in case the engineer suggests replacement of a part that is probably not at fault.
Thanks in advance, all comments welcome.