Dear All,
Hello, I am a new member - perhaps with a familiar problem! My Potterton Lynx 2 combi boiler is "cyclling." when the central heating timer switches the heating on in the evening, the boiler will fire up OK, but after about an hour or two (this time varies) of going through its normal timed operation, the boiler will commence going through its three stage ingnition sequence of "demand," "ignition," and "flame," over and over again. As soon as the third light comes on and the boiler lights, within a couple of seconds the flame will be extinguished and the boiler will go through its start up sequence again - "demand," "ignition," and "flame" all over again. This will keep going until I switch the boiler off at the main wall switch, and leave it off for a couple of minutes. I switch it back on and it will run OK for perhaps another couple of hours until the "cycling" starts again. The problem does not occur when demands are made for doestic hot water. I have (over the past 15 years), replaced the "PCB" board, the "air valve," Two water pumps, and a DHW flow valve. I have also replaced the main pressure vessel. I am a self taught plumber.
Can anyone give any advice on this, or is it a case of the boiler just being "old" and needs replacement? (Apart from the "cycling," the boiler works fine in supplying hot water for washing or bathing on demand, and working the central heating.
Regards,
Phil Edwards (Mr)
Hello, I am a new member - perhaps with a familiar problem! My Potterton Lynx 2 combi boiler is "cyclling." when the central heating timer switches the heating on in the evening, the boiler will fire up OK, but after about an hour or two (this time varies) of going through its normal timed operation, the boiler will commence going through its three stage ingnition sequence of "demand," "ignition," and "flame," over and over again. As soon as the third light comes on and the boiler lights, within a couple of seconds the flame will be extinguished and the boiler will go through its start up sequence again - "demand," "ignition," and "flame" all over again. This will keep going until I switch the boiler off at the main wall switch, and leave it off for a couple of minutes. I switch it back on and it will run OK for perhaps another couple of hours until the "cycling" starts again. The problem does not occur when demands are made for doestic hot water. I have (over the past 15 years), replaced the "PCB" board, the "air valve," Two water pumps, and a DHW flow valve. I have also replaced the main pressure vessel. I am a self taught plumber.
Can anyone give any advice on this, or is it a case of the boiler just being "old" and needs replacement? (Apart from the "cycling," the boiler works fine in supplying hot water for washing or bathing on demand, and working the central heating.
Regards,
Phil Edwards (Mr)
