Help required with fuel burning heater. I have the timed options on the screen but when I set the timer nothing happens. I don't have an option for manual heat or manual vent (greyed out). I changed the number 2, 5 amp fuse, still nothing. Please look at the attached pictures and give me your opinions as what to try next.

Update. I now have the manual controls illuminated but still nothing working. If I had any hair I would pull it out in frustration.

I think for the parking heater to kick in, the battery has to be above a certain voltage and there has to be at least a quarter of a tank of fuel, so if the battery or fuel are low it will not fire up, also I think if the heater fails to fire a certain number of times it goes into a lock out mode which can be reset with the GAP tool, does the heater fire up when you start the vehicle at low temps of 6 Deg and below ?, There's a full section on the fuel burning heater on the disco 3 forum.

Thanks for the reply. I have a full tank of fuel ambient temp -2. It doesn't work on timer or manual heat. It doesn't work with or without the engine running or whatever the temperature is.

Yet another update: the heater is now working. After advise from a first class indi (Strathearn Engineering Perth) I found more settings on my Gap lld for the heater and cleared all codes. All is now well.

Hi,

what was the cause though

had it locked out from previous none fire events or something else.

 Porsche Cayenne 2022
gone Porsche Cayenne 2020
gone Corris Grey HSE Dynamic 2016
gone Ipanema HSE lux 2010
gone Rimini HSE 2005
!!