My fan is constantly on and my climate control panel looks dead

[ssandison]

Hopefully someone can help me with this issue on my E53. My AC/Heater is constantly blowing even when the car is off. The climate control panel doesn’t light up and none of the buttons work. I’ve removed fuse 48 to stop the air conditioning constantly blowing. I replaced the FSU/FSR as that’s what I read was almost always the issue. I also ordered a second hand climate control panel off eBay just in case but it turns out my panel is 18 pin and the new panel is 12 pin. Oh well. I guess there is no way to use the 12 pin panel? It looks expensive to get an 18 pin panel. Do you think if I get an 18 pin panel that will solve the problem or is the issue likely elsewhere?