Vailant ecotec plus 824 no heating or hot water

[Thorpy0507]

Hopefully you wonderful people can help.

We have a Vaillant and since it was left turned off overnight we now have no hot water or heating.
There are no fault codes, the pressure is fine but the screen shows 0 degrees c. When pressing I it shows s.0 (no heat required).
Turning a hot water tap on does nothing as does turning the Danfoss rx1 thermostat.
What can I do?

Thanks in advance.
Simon

 

[picasso]

have you got both the control thermostats turned clockwise ?

 

[Thorpy0507]

have you got both the control thermostats turned clockwise ?

Yes and the C is on to say that it is set for instant hot water.
When moving the dials the target temp changes but the screen still goes back to 0 degrees

 

[Phill Peck]

It shouldn't show 0 deg

Are you sure it doesn't say F 0

Your gonna need an engineer

 

[Thorpy0507]

It shouldn't show 0 deg

Are you sure it doesn't say F 0

No there are no fault codes at all.
And the only status code that comes up is s.0 no heat required.

 

[Agile]

You will still need an engineer.

Sounds like a failed PCB. If so a fixed price repair deal would probably be best.

Tony