M
MrLeeroyBrown
Hello, I Wonder if anyone can help - got an issue with my Main Combi 30HE & it is confusing me a lot!! (doesn't take much
Problem is with firing up - the diagnostic reports the issue is either the fan or the flue.
I 'can' get it to fire up, but usually only on the 10-15th time of trying & only when the front of the unit has been taken off.
Once fired up, (I replace the front!), I have had it operate anywhere between 1 minute & 6 hours before it shuts down with the fault again.
On checking, I can't see any blockage in the flue outside & the fan seems to be operating fine & at a decent speed.
I've took the spigot off the fan manifold & peered inside the fan and eveything seems as it should.
I've checked the air pressure switch & the sensing tubes and they seem ok too - i.e. when I blow into them I can hear the microswitches operating & there doesn't appear to be a blockage / break in the tubes.
I pretty convinced something is causing the air pressure switch to trip, though can't work out what??
A couple of times when I have managed to fire it up, i have noticed the air flow seems to be coming in waves - almost as if there is some sort of backdraft. Could it be possible wind is coming back in through the flue?
The confusing part is the problem only seems to have started since the cold weather set in?
Has anyone got any thoughts on what the problem might be?
Thanks
Lee.
Problem is with firing up - the diagnostic reports the issue is either the fan or the flue.
I 'can' get it to fire up, but usually only on the 10-15th time of trying & only when the front of the unit has been taken off.
Once fired up, (I replace the front!), I have had it operate anywhere between 1 minute & 6 hours before it shuts down with the fault again.
On checking, I can't see any blockage in the flue outside & the fan seems to be operating fine & at a decent speed.
I've took the spigot off the fan manifold & peered inside the fan and eveything seems as it should.
I've checked the air pressure switch & the sensing tubes and they seem ok too - i.e. when I blow into them I can hear the microswitches operating & there doesn't appear to be a blockage / break in the tubes.
I pretty convinced something is causing the air pressure switch to trip, though can't work out what??
A couple of times when I have managed to fire it up, i have noticed the air flow seems to be coming in waves - almost as if there is some sort of backdraft. Could it be possible wind is coming back in through the flue?
The confusing part is the problem only seems to have started since the cold weather set in?
Has anyone got any thoughts on what the problem might be?
Thanks
Lee.