Can anyone tell me what an error code "E12" means on a Vaillant Ecomax 824 Combi-boiler? The boiler seems to be +/- OK when operating heating, but keeps cutting out when only water is called for - although it eventually 'resets' itself.

Mach1, March 2008

What is F61 error

Les Machin, January 2017

hi my vaillant boiler came up with the error code f20...i bought a part that was connected to the pressure valve..it still came up f20 when connected up.thought id have to buy a new pump..5hrs later i check it and it now comes up f27...checked the error code details and its saying flame detecter is defective...please please can any1 help me? thanx

Rebekah, June 2011

hi ....i have the exact same problem...when we are usng the shower the water seems to go hot and cold error code E 12 starts flashing...we have to keep the pressure on the shower low and water will be a consttnt warm??how did u resolve the problem??

amber, March 2011

My Boiler is displaying Fault Code F22 what does this maen?

Craig, December 2010

F.75 - Mine just came up with this code, the water pressure dial next to the on/off switch on the bottom right hand side of the controllers was on the light green side (low). At the bottom of the boiler where the pipes are, there are 2 white turn handels which should say closed, turn these both around for a few seconds until the pressure rises to the mid green area on the dial then turn them both back to closed. Turn the boiler back on and it should work fine.

Andrew in Newport., November 2010

was your F75 code resolved with a new pump? I have one too.
Mike
Jan 2010

Mike Rimmer, January 2010

coul you tell me please what is the error code f75 is that comes on my boiler.
As the boiler wont fire up

clowes170, May 2009

I have the same problem. The fault code means that the water leaving the boiler is more than 35 degrees hotter than the water entering the boiler. I am just about to get Vaillant round to fix it but my guess is that the pump is not pumping well enough and therefore the water is moving too slowly and heating up too much

Peter, November 2008