Hi all,
I've got a peculiar (well, to me at least) problem with my central heating, and I was wondering if anyone had any ideas as to what the problem might be.
I noticed it just this morning. When the heating is turned on (and the room temperature is below the thermostat temperature), the boiler's demand light turns on, and the boiler lights. However, about fifteen seconds later, the demand light goes off and the boiler just stops heating. However, I believe the pump is still going, as I can hear the water circulating through the radiators, although the radiators then cool back down as the water is not being heated. The thermostat and control unit/timer appear to be working fine (in that I can use either to turn the heating on/off as they should, but when the heating is turned on, the above behaviour is exhibited).
The boiler is a Potterton Lynx 2, and the central heating system is sealed. I'd noticed that the system pressure was very low a couple of weeks ago, and this morning (after discovering the problem described above), I worked out how to repressurise the system and did so, taking it up to a pressure of 0.5 bar when cold (incidentally, I don't have the boiler manual, so could someone confirm that this is the correct pressure please? I was basing that on the fact that the pressure gauge is coloured red below 0.5 bar and green above it...). I also reset the boiler by turning it off at the mains, waiting for a minute or two and then turning it back on. Neither of these things seems to have had any effect with regards the heating problems.
I know very little about plumbing and central heating systems generally, so please keep replies relatively simple! Many thanks in advance for your help!
I've got a peculiar (well, to me at least) problem with my central heating, and I was wondering if anyone had any ideas as to what the problem might be.
I noticed it just this morning. When the heating is turned on (and the room temperature is below the thermostat temperature), the boiler's demand light turns on, and the boiler lights. However, about fifteen seconds later, the demand light goes off and the boiler just stops heating. However, I believe the pump is still going, as I can hear the water circulating through the radiators, although the radiators then cool back down as the water is not being heated. The thermostat and control unit/timer appear to be working fine (in that I can use either to turn the heating on/off as they should, but when the heating is turned on, the above behaviour is exhibited).
The boiler is a Potterton Lynx 2, and the central heating system is sealed. I'd noticed that the system pressure was very low a couple of weeks ago, and this morning (after discovering the problem described above), I worked out how to repressurise the system and did so, taking it up to a pressure of 0.5 bar when cold (incidentally, I don't have the boiler manual, so could someone confirm that this is the correct pressure please? I was basing that on the fact that the pressure gauge is coloured red below 0.5 bar and green above it...). I also reset the boiler by turning it off at the mains, waiting for a minute or two and then turning it back on. Neither of these things seems to have had any effect with regards the heating problems.
I know very little about plumbing and central heating systems generally, so please keep replies relatively simple! Many thanks in advance for your help!
