No cupboard around it.
I think a local plumber may have been heavy handed with the one, but the other just dropped off when I had to remove the wireless receiver, as mentioned in another post I made on the forum.
The glue holding the dial to the shaft looks a bit brittle.
Both of the control dials on our vaillant have separated from the shaft that goes through the control system.
Looking at them, they both separated at the same place and look identical at the break.
Looking at the board the shafts connect to I don't see how their case design would have...
Thanks Sam.
I disconnected the receiver and did as you said.
Fired up straight away when set to 1 for the CH dial.
I've now set it to timer and it'll do great until tomorrow when I get some new cabling to wire in the receiver once again.
Thanks again for a speedy diagnosis technique...
I see I also have the model code wrong.
As it's an 8 - 24kW bolier, it's obviously and 831 range boile
http://www.vaillant.co.uk/installers/heating-solutions-1/high-efficiency-boilers-2/combination/ecoTEC_plus
Identical to this:
RF601
the thermostat is working fine and I've tested it, tried learning mode, etc.
Once the temp reaches thermostat's set temp, then the CH turns off but will not restart, even if I use the override on the receiver to make sure it's not a faulty start signal from...
Our Vaillant is 18 months old. Ecotec plus 831 (kW range is 8 - 24) (Edit: Model code corrected)
It has a draytek wireless thermostat fitted and also a mechanical timer.
HW is fine, system is pressurised around 1.8 - 2
Ive read through other forum posts recommending checking S codes and...