First just to say I'm new to the site and thanks for this site and for all the top advice and responses I've read in trying to work out what my bolier's prob is.
My aged Potterton Lynx (in the house when I bought it 10yrs ago) has started to sulk. 3 or 4 times in the last month, it's failed to ignite when either CH or DHW are demanded.
The Demand light lights and there's sound (like water flowing through) from the boiler, but no slight clicking or buzzing sounds (which normally happen just before the ignition light comes on), no ignition light and therefore no heat.
It's happened in the day & evening, and both while the CH has been off and running on timer (so prob not be connected to overheating?). Both CH and DHW controls are set to around "10 o Clock" - which is medium.
If CH off, opening hot tap illuminates the Demand light, but there's no ignition. If CH is on via timer, it's must have either started heating at first but then failed to ignite to maintain temp at some point, or just never ignited, so the demand light is on, the CH pump is running, but no ignition or heat.
First time, not knowing there was no pilot light, I figured it was just the pilot blowing out, so cycled the mains power to the boiler off and on a few times with the CH and/or DHW running, and after a few goes, it fired up and then worked consistently for a while. Second time, it came back with a power cycle or three and again ran for several days with no prob.
Yesterday, heating failed to heat in the morning, and couldn't get HW demand to ignite boiler either. Tried the power off n on several times, but to no avail. I left the boiler powered up and with the CH running (no ignition) while I went to seek advice. Then, around 45mins later, all by itself the boiler fired up.
I'm planning to replace the boiler anyway in the not too distant, but right now could use any advice on what the prob might be so I can keep this one working for another few months. From reading other posts, could it be the PCB? Or is it just the ignition device which is failing to spark? Or is it some temperature sensor problem causing the boiler to cut out?
Any help gratefully received.
Oh and Happy New Year!
Andy
My aged Potterton Lynx (in the house when I bought it 10yrs ago) has started to sulk. 3 or 4 times in the last month, it's failed to ignite when either CH or DHW are demanded.
The Demand light lights and there's sound (like water flowing through) from the boiler, but no slight clicking or buzzing sounds (which normally happen just before the ignition light comes on), no ignition light and therefore no heat.
It's happened in the day & evening, and both while the CH has been off and running on timer (so prob not be connected to overheating?). Both CH and DHW controls are set to around "10 o Clock" - which is medium.
If CH off, opening hot tap illuminates the Demand light, but there's no ignition. If CH is on via timer, it's must have either started heating at first but then failed to ignite to maintain temp at some point, or just never ignited, so the demand light is on, the CH pump is running, but no ignition or heat.
First time, not knowing there was no pilot light, I figured it was just the pilot blowing out, so cycled the mains power to the boiler off and on a few times with the CH and/or DHW running, and after a few goes, it fired up and then worked consistently for a while. Second time, it came back with a power cycle or three and again ran for several days with no prob.
Yesterday, heating failed to heat in the morning, and couldn't get HW demand to ignite boiler either. Tried the power off n on several times, but to no avail. I left the boiler powered up and with the CH running (no ignition) while I went to seek advice. Then, around 45mins later, all by itself the boiler fired up.
I'm planning to replace the boiler anyway in the not too distant, but right now could use any advice on what the prob might be so I can keep this one working for another few months. From reading other posts, could it be the PCB? Or is it just the ignition device which is failing to spark? Or is it some temperature sensor problem causing the boiler to cut out?
Any help gratefully received.
Oh and Happy New Year!
Andy