I have a 4-5 year old Ariston boiler which works perfectly in the summer, but intermittently misfires during cold weather in the winter months.
The symptom: the gas valve opens and closes almost immediately.
The cycle repeats itself a few times until the boiler locks up, displays an error code (A99 if I recall correctly) and requires a reset to restart.
The problem occurs both on DHW and CH.
Does anyone have any idea of what the problem could be? I need to decide whether to get it repaired next time it plays up, or get a new boiler installed now...
The symptom: the gas valve opens and closes almost immediately.
The cycle repeats itself a few times until the boiler locks up, displays an error code (A99 if I recall correctly) and requires a reset to restart.
The problem occurs both on DHW and CH.
Does anyone have any idea of what the problem could be? I need to decide whether to get it repaired next time it plays up, or get a new boiler installed now...