Diesel heater won't turn off

[csal]

We have a T5 California, the auxiliary diesel heater won't turn off (factory fitted). The only way we have found to stop it running continuously is to remove the fuse.
We have tried turning it off, changing speed/settings etc through the control panel but with no luck as when the heater is running the control panel turns off and only comes back on once we have stopped the heater by removing the fuse!
Any ideas on what to check, or how we can resolve the issue.
Many thanks

 

[Nicholas Boff]

Stuck button or control panel fault. Can you control via the heater remote keyfob?

 

[csal]

Thanks for your reply, we will try using the remote to see if that solves the issue.