Thread: Air Conditioning not working, help required..........

Hi there,

I have taken some readings from my Faultmate, does this help anyone diagnose the fault, I have a feeling it isn't a fuse.....

The main fault data didn't attach I'll try a different approach tomorrow. Mentions about a stepper motor............any clues?

Cant help with aircon issues.Does your faultmate work on the MY14 D4???? Im looking for a replacement for my Nannocom,it paid for itself over and over with the D2 and TD5 Defender.Then again I have 5 years until it isnt LRAs problem.Still,I will be looking for a diagnostics setup before I go traveling in the next year or 2
Cheers
Andrew

Hi Andy,
If you check the Blackbox web page (Cyprus) that will tell you what you need to buy, I have checked and the web page shows D4 software. I haven't got my hands on a D4 as yet.

I've had stepper motor faults from a stuck blend door.

I have no idea what is causing your issue but - from memory there are at least three fusible links involved in the operation of the ac (2 under bonnet and one under dash maybe) and a whole pile of other over complicated stuff too.

Do your blend doors operate (can you send air up down etc) ? Does hitting recirc do anything ? When did it work last ?

I've got the hvac manual sections if you want me to she them to you ?

Out of interest does your car fart when you press recirc ? If it does normally, is it still doing it now ?

Is one of the compressor pipes cool and the other hot or are they both warm? Both warm indicates that the compressor is not pumping.

Is the compressor turning? If the V6's compressor is similar to the 2.7's where the compressor always turns but the pulley drive is sacrificial if the compressor siezes, is the pulley spinning on the shaft? If the compressor has a clutch, is the clutch engaging?

Hi There,
I have a lot of things to check from the last two posts, however I will try and attach the Faultmate codes, the system has eight untested fault codes. These are hard faults and won't reset.

Both the pipes are warm on the compressor, with the air con on, the air con guy confirmed the compressor was doing nothing, as for parts turning I haven't had a look, I do know that the engine "load note" didn't change from when the air con was off to on. The fart noise, I know the one you are talking about, I'll check tonight.

If you get to see this the bottom fault is the one of most interest. I think they have attached this time round.

Again thanks for assistance rendered.

Not tested codes are only a list of possible faults that haven't occurred, so ignore the lot.

I can't decipher the display even by saving the picture, enlarging it and attempting to adjust contrast etc.

I would inspect the compressor shaft with the a/c switched on and engine running to see if its turning. Is there a clutch as part of the pulley, with 1 or 2 wires going into the front of the compressor?

I think if the compressor is not running/working you can ignore my remarks. Have you checked all the related fusible links under bonnet and under dash ?