Hi i am a fist time user of this site and apologize in advance for stupid comments or mistakes !
I have Vaillant vcw gb 242/282eh which was installed in 1992. It has been reasonably reliable up to now.
In the past I have had problems with no hot water which I traced to a blockage in the water section & also replaced the diaphragm as a matter of course. (not to difficult !)
Then the heat exchanger started to leak apparently common for this model. So fitted new modified type (dont need the wife in the kitchen asking hows it going when doing this job !)
Then the fan came loose from the fan motor (fixed)
The problem now is that when switching on the central heating it can take up to 30 seconds or so until the burner ignites & fires up (hot water all ok & fires up 5-10 secs) Sometimes doesn't fire up at all.
Also when radiators reach temp unit switches off for 5 mins then tries to restart mainly unsuccessfully.
Will sometimes restart if you switch off main red toggle switch & leave for 5 secs before switching back on.
Wondering if it might be a problem with the diverter valve not triggering the micro switches or could it be something to do with the flame supervision circuit board ?
Any advise would be much appreciated
(PS I live in a soft water area)
I have Vaillant vcw gb 242/282eh which was installed in 1992. It has been reasonably reliable up to now.
In the past I have had problems with no hot water which I traced to a blockage in the water section & also replaced the diaphragm as a matter of course. (not to difficult !)
Then the heat exchanger started to leak apparently common for this model. So fitted new modified type (dont need the wife in the kitchen asking hows it going when doing this job !)
Then the fan came loose from the fan motor (fixed)
The problem now is that when switching on the central heating it can take up to 30 seconds or so until the burner ignites & fires up (hot water all ok & fires up 5-10 secs) Sometimes doesn't fire up at all.
Also when radiators reach temp unit switches off for 5 mins then tries to restart mainly unsuccessfully.
Will sometimes restart if you switch off main red toggle switch & leave for 5 secs before switching back on.
Wondering if it might be a problem with the diverter valve not triggering the micro switches or could it be something to do with the flame supervision circuit board ?
Any advise would be much appreciated
(PS I live in a soft water area)