Have been having the lockout fault on a Potterton Suprima 50L, so had PCB replaced with 5111603. Fixed the lockout problem, but rapid cycling has become apparent since.
When starting from cold, takes about 10 mins to reach temperature, all radiators getting hot, albeit probably not balanced properly as some slightly slower than others, but they all do get very hot after 20-30mins. Thereafter, boiler will heat for about a minute and a half, and then rest for 3 or 4 mins, and then heat again. Obviously getting hot at boiler as can hear slight hissing, i.e., water close to boiling point, before burner turns off. Would suggest the boiler is right to think it has reached the maximum temperature before turning off.
Is this down to badly balanced radiators, an over-specified boiler for the job (6 radiators in a flat), or is the thermistor needing replacement? Or something else entirely?
I want to reduce the number of cycles to help extend the lifespan of the PCB, so any advice on how to reduce the number of cycles would be gratefully received.
Thanks.
When starting from cold, takes about 10 mins to reach temperature, all radiators getting hot, albeit probably not balanced properly as some slightly slower than others, but they all do get very hot after 20-30mins. Thereafter, boiler will heat for about a minute and a half, and then rest for 3 or 4 mins, and then heat again. Obviously getting hot at boiler as can hear slight hissing, i.e., water close to boiling point, before burner turns off. Would suggest the boiler is right to think it has reached the maximum temperature before turning off.
Is this down to badly balanced radiators, an over-specified boiler for the job (6 radiators in a flat), or is the thermistor needing replacement? Or something else entirely?
I want to reduce the number of cycles to help extend the lifespan of the PCB, so any advice on how to reduce the number of cycles would be gratefully received.
Thanks.