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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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How to disable V90 air conditioning in winter?Views : 1754 Replies : 36Users Viewing This Thread : |
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Nov 27th, 2018, 09:19 | #11 | |
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I haven't checked the diagram to see if that is the case on the Volvo but it's worth verifying.
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Nov 28th, 2018, 21:08 | #12 |
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Nov 29th, 2018, 12:30 | #13 |
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Nov 29th, 2018, 13:21 | #14 |
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To be honest I used to think the same way about air conditioning but that was back in the days of manual air con. I would only turn it on when it was desperately needed and keep it off the rest of the time. In those days inefficient air con systems did use extra fuel but since I got my first car with auto climate control (Passat) and noticed no extra fuel use with it on I have my air con on all the time. Modern air con systems are extremely efficient and have a negligible effect on MPG. But they do have a huge effect on comfort and safety in my opinion. Keeping my windows clear and the interior of the car at a constant set temperature improves my driving experience no end.
As for wear and tear on the compressor? Turning the air con off and only using it occasionally would put more of a strain on the compressor than running it all the time. The whole air con system is designed to be in constant use. If running it caused wear and tear then we would all turn our fridges off at night before we go to bed and turn them on again in the morning.
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Nov 29th, 2018, 13:37 | #15 |
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Don`t forget these are old technology car`s compered to now.......Mercedes recommend AC on all the time and mine is... it is the electronic system that turns it off or makes a mix of the air when the temp. is right not to want it fully on?
As said if you want it off then turn it off manually or pull out the plug in the middle of the bulkhead under the bonnet which is the low pressure sensor and then it won`t work at all until plugged in but be prepared for leaks of gas through the dried up rubber seals? My `96 960 when the AC was on made a difference on a long run of 4mpg less and together with the heavy consumption on these engines you can do without it unless it is really needed. At 70mph the 960 did 30mpg in SUMMER heavier in Winter but with AC down to 26 or 27mpg.....i had the motor for 5yrs and it remained the same.
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Nov 29th, 2018, 14:03 | #16 |
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I think it was Michael Winner, who allegedly had short arms and long pockets, who said he’ll look to save money wherever possible, except when it came to his own comfort. FWIW, that’s my take on the use of aircon.
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Nov 30th, 2018, 07:36 | #17 |
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Like Dave has said you need to run it every so often as the A/C lines the seals.
Also someone mentioned running it low on gas... how? They have a cut out switch that senses wether the pressure is too low to operate safely which stops the A/C clutch kicking in. |
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Nov 30th, 2018, 12:26 | #18 | |
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I ran it for 15 mins at a time but if i forgot to turn it off because it may overheat the compressor also has a temp. controlled switch so it cannot do damage....it all just turns off until it has cooled sufficient.
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Nov 30th, 2018, 14:03 | #19 | |
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The ECC system triggers the engine cooling fan so far as I know. |
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Nov 30th, 2018, 15:03 | #20 | |
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I can't find the circuit diagram at the moment, it's on Windows somewhere and the other thing is that the ECU won't know when the A/C is running so won't increase the idle speed to cope as necessary.
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