I have a Vaillant Ecotec boiler which has, by and large worked well for a couple of years.
After it was off during house renovation a couple of years ago, I kept having various problems (including F.24) which were finally solved when someone wonderful told me to run something called P.0 as it would bleed air from the boiler that I couldn't get from the radiators.
Seemed odd but I followed his instructions and after many shunting and grunting noises from the boiler, it fired up and - until recently - has behaved faultlessly.
It has started bringing up F.24 errors again and although I have bled the radiators (TINY amount of air from ONE rad only), the unit keeps tripping. Sometimes will run for a couple of days, sometimes only 30 minutes.
I don't know if this is a coincidence, but it USUALLY seems to fail in the morning and not in the evening. Cannot see any logic - but seems to be a fairly strong bias to "morning F.24" as opposed to a problem afternoon / evening.
I have tried the get P.0 running again - it worked last time perhaps it will again was the logic - and I can only get the system to offer me p.1 and p.2 - the other ones (p.0 and p.6 in particular) seem not to be there.
I am obviously doing something wrong as it worked when I tried it once before. I am pressing the + button and turning on the power - but then I have P.1 or P.2 - no access to P.0.
What am I not doing now that I got right before please.
I have checked memory for faults and other than F.24 it did once have a F.1 error - but I cleaned the connectors on the NTC themistors and it hasn't done that since, so hopefully that was just an oxidised contact (was a bit grotty).
Pump SEEMS to be in good shape - runs quietly and sprays water out of rad with enthusiasm - and also when it is not tripping out, the hot water circulates quickly (left in high mode) and the unit works very well indeed.
So I guess I am asking two things please:-
1. What am I doing wrong to only get P.1 and P.2 instead of P.0 - P.6
2. Other than P.0 is there anything else which might help sort this intermittent fault please?
Regards
Mark
After it was off during house renovation a couple of years ago, I kept having various problems (including F.24) which were finally solved when someone wonderful told me to run something called P.0 as it would bleed air from the boiler that I couldn't get from the radiators.
Seemed odd but I followed his instructions and after many shunting and grunting noises from the boiler, it fired up and - until recently - has behaved faultlessly.
It has started bringing up F.24 errors again and although I have bled the radiators (TINY amount of air from ONE rad only), the unit keeps tripping. Sometimes will run for a couple of days, sometimes only 30 minutes.
I don't know if this is a coincidence, but it USUALLY seems to fail in the morning and not in the evening. Cannot see any logic - but seems to be a fairly strong bias to "morning F.24" as opposed to a problem afternoon / evening.
I have tried the get P.0 running again - it worked last time perhaps it will again was the logic - and I can only get the system to offer me p.1 and p.2 - the other ones (p.0 and p.6 in particular) seem not to be there.
I am obviously doing something wrong as it worked when I tried it once before. I am pressing the + button and turning on the power - but then I have P.1 or P.2 - no access to P.0.
What am I not doing now that I got right before please.
I have checked memory for faults and other than F.24 it did once have a F.1 error - but I cleaned the connectors on the NTC themistors and it hasn't done that since, so hopefully that was just an oxidised contact (was a bit grotty).
Pump SEEMS to be in good shape - runs quietly and sprays water out of rad with enthusiasm - and also when it is not tripping out, the hot water circulates quickly (left in high mode) and the unit works very well indeed.
So I guess I am asking two things please:-
1. What am I doing wrong to only get P.1 and P.2 instead of P.0 - P.6
2. Other than P.0 is there anything else which might help sort this intermittent fault please?
Regards
Mark
Possible PCB 
