Thread: 300tdi airconditioner not working

Chris, there is a low-gas cutout that may have activated.
If the system has lost its charge, then it prevents anything starting up.
Mine cracked the aluminium pipe where it goes into the aircon condenser (in front of the radiator) and I had the same fault.

check the connections on the 2 plugs on the elbow of the thermostat outlet

check the yellow relay down in the drivers side kick panel

pull the plug on the 3 way switch and short across it.

2 fuses and 2 relays in the battery box.




1 fuses and relay for the fans and control circuit
1 fuse and relay for the compressor

Thanks Dave,
the first 2 points seem straightforward, is the 3 way switch the fan control in the unit?
Chris

thanks JBoot51 ill check those too

nope its usually on the pipe on the engine side of the vehicle in the engine bay about level with the lift pup.

the plug is on the bottom.

if you pull that plug and short it then the problem is either A, the switch or b, (and most likely) youve lost the gas.

If shorting that switch doesnt sort it then you have other problems which can be as simple as a fuse or as annoying as a blown coil in the compressor clutch, hell it can even be a bad earth.

My issue was the relay on the control board (under the passenger seat) had died. It was intermittent and responded sometimes by tapping the relay. You can read the post here if you are interested

I had intermittent issues with the sealed control box (in the battery compartment). I prised it open and found that the +'ve feed terminal had arced and burnt out the solder joint. I resoldered, but the pin had also destroyed the plug due to heat, so I soldered extension wires and single plugs and plugged it back into the loom. I had to do this as I was travelling through the Kimberley and couldn't get parts, the original parts aren't available, but better generic after market control boxes are available from automotive AC places for about $50.