Hi,
I have a Vaillant TurboMax 828e. Had it for 6 years no problems so far. Topped it up in the past. No problems with that either.
Yesterday, I topped it up to 1.2 bar and following this, DHW is OK but the CH is highly erratic. The CH attempts to start, then displays S.07 'Water pump over run'. It re-attempts occasionally, but ends up in a few seconds with S.07. On one occasion, it realised that the temperature (round 70c) was not right, the temperature display went down very rapidly to 39C, it then gave me some CH for 10-20 minutes before going S.07 again.
Any thoughts? And why would this be caused by topping up? I did bleed the radiators (honest!)
My thoughts so far is that it could be:
-pump auto air valve is blocked (can it be unblocked? how do I test it?)
-maybe empty the radiators and refill?
-diverter switch?
-something else?!?!?!
Thanks,
ThePig.
I have a Vaillant TurboMax 828e. Had it for 6 years no problems so far. Topped it up in the past. No problems with that either.
Yesterday, I topped it up to 1.2 bar and following this, DHW is OK but the CH is highly erratic. The CH attempts to start, then displays S.07 'Water pump over run'. It re-attempts occasionally, but ends up in a few seconds with S.07. On one occasion, it realised that the temperature (round 70c) was not right, the temperature display went down very rapidly to 39C, it then gave me some CH for 10-20 minutes before going S.07 again.
Any thoughts? And why would this be caused by topping up? I did bleed the radiators (honest!)
My thoughts so far is that it could be:
-pump auto air valve is blocked (can it be unblocked? how do I test it?)
-maybe empty the radiators and refill?
-diverter switch?
-something else?!?!?!
Thanks,
ThePig.