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18th May 2022, 17:03 | #1 |
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rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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Aircon again
So, a few months back, got the aircon tested and found a leak, rotten condensor. This was replaced, retested and re-gassed all good Today went for a drive as it was nice, aircon on, hot air Got home and checked fan speeds etc, fine, but when I did the trinary test for the compressor clutch, nothing no kicking in whereas before it did. Does this mean compressor's goosed?
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19th May 2022, 07:19 | #2 | |
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Simon
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19th May 2022, 07:55 | #3 |
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Sound like it is out of gas again or possibly the compressor relay in the underbonnet fuse box has failed swap over the 2 small relays and check again
Dave |
19th May 2022, 08:11 | #4 |
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rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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Followed Jules' instructions Simon https://www.the75andztclub.co.uk/for...ht=testing+fan
Cheers Dave, I'll give that a go Can you point out the 2 relays please? |
19th May 2022, 08:20 | #5 |
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The relays are the 2 small black ones one is for the air con compressor the other is front fog lights just swap and try
Dave |
19th May 2022, 10:03 | #6 |
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OK, swapped the fuses over, no difference, tried the trinary again, clutch not engaging. The car has been making a whining sound lately, rises and lowers with revs, this all points to compressor to me I mean, it is over 20 years old now Think I'll make do without aircon for now
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19th May 2022, 10:23 | #7 | |
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As Jules' guide doesn't give the wiring colours for your petrol engine, there is a possibility that you may have inadvertently chosen the wrong one. You need black (pin 4) and grey/yellow (pin 1) noting that there's also a yellow/grey (pin 3) which will have no effect upon the compressor clutch. For what it's worth I don't endorse this test because it forces the compressor to run when there may be little or no refrigerant gas in the system, and since the lubricating oil is circulated with the gas this poses a risk of damaging the compressor. I'd be interested to see if substituting another relay works. Relays are extremely reliable so I doubt it. I think your system has most likely lost its refrigerant. Was your air conditioning out of service for a lengthy period before you had it recharged a few months ago? Simon
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19th May 2022, 10:28 | #8 | |
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Don't bale out! Get it fixed, you know it makes sense! Simon
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19th May 2022, 10:34 | #9 |
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You say you swapped the fuses? you should have swapped the relays if you swapped them and still not working then either bridge the relay or run a 12v supply directly to the compressor wire and see what happens
I have known quite a few of these relays fail causing this problem to check you have a good relay do the front foglights work if so the relay is ok then swap with the A/C relay running a wire to test will not harm it for couple of mins as lets be honest you have nothing to lose as it does not work at the moment Dave |
19th May 2022, 10:54 | #10 | |
This is my second home
rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009
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