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4th July 2019, 11:27 | #1 |
This is my second home
Rover 75 Saloon & Tourer Join Date: Sep 2012
Location: Lincoln
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Help with air con relay in engine bay
April I had the air con re-assed
Hardly used the car since. Today, no cooling via air con. Took it to garage to check for a leak, nothing found. They have re-gassed it and used apparently a lot of leak dye. I'll use the car over the weekend and take it back to them next week see if they can spot a leak. Mechanic said that the engine bay relay was stuck. This caused the compressor to run more then it should, heating the gas and perhaps it has vented via a pressure release valve. Have you know this before, I think the relay part number is YWB0040 item 14 on this link https://rimmerbros.com/Item--i-GRID001619 what causes the relay to activate and deactivate and what does the relay control? macafee2 |
4th July 2019, 12:06 | #2 | ||||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Ian; you're raised a lot of points so I'll deal with them individually.
That depends upon the method used to detect a leak. Being a garage and not an air conditioning specialist I suspect that they just ran their automatic machine to see if a vacuum was held. I know from expensive experience that this is an unreliable method of detecting leaks. Quote:
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It deactivates when either the low or high pressure trinary switch operates (indicating a fault). The relay controls the engagement of the compressor clutch. This transmits drive from the engine into the compressor. In summary Ian, go to a self-employed mobile specialist who will do the job properly for you. Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. Last edited by SD1too; 4th July 2019 at 12:17.. Reason: Additional compressor/relay info. |
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4th July 2019, 12:15 | #3 | |
This is my second home
Rover 75 Saloon & Tourer Join Date: Sep 2012
Location: Lincoln
Posts: 14,967
Thanks: 1,630
Thanked 3,032 Times in 2,181 Posts
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If the relay does not deactivate, what happens? The compressor carries on running but what else? Is there a way for me to make it deactivate or test it deactivates such as increasing the temperature control. macafee2 |
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4th July 2019, 12:24 | #4 | |||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,525
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
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Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
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