Hi,
My Vaillant Turbomax Plus 824E combi boiler is showing an "F 1" fault. I have no hot water or central heating. Turning the boiler on and off or pressing the reset button just results in the green light under LCD illuminating and you hear the 3 clicks of the valves. The LCD firstly shows a temperature and then shows " F 1". Nothing works after that.
Any advise or help would be appreciated.

Cj, January 2008

Since I have it, it has this intermittent.

Though I see it happen more often when it reaches it's setpoint. Here the temperature is set at 60C, when it freezes outside it will run for longer periodes at 60C.

It is not a Vaillant really, December 2010

I have the same problem on the ThermoCompact 615E and although changed the Sensor and checked the cable not broken, it still shows F.1

Any ideas please?

JeddiNight, August 2009

where is the return sensor located.
Thanks

r, September 2008

the sencers gone on the boiler/buy new sencers and
it will work as new.

mark kirkman, July 2008

return ntc sensor failed

paul, February 2008