Yet another aircon question

Networkguy · Sep 10th, 2002, 14:28

On my 98' S70, the aircon has suddenly started doing strange things.

After the car has been driving for a while, you can hear the aircon click on and then off (at about 1 second intervals) constantly. If I switch the aircon off then back on, it stops for a while then starts doing it again. When driving slowly whilst it is doing it, you can feel the load on the engine as it turns on and off etc.

I had the system serviced and charged at the main dealer in May and a full service in July. On top of this, the aircon seems to be working as it is blowing very cold air into the car.

Now I have booked it into the dealer but they are wanting to re gas the system before they can do anything with it which I am non too happy about as I only had it done a few months back.

Does anybody have any clues on this?

Thanks

pettaw · Sep 15th, 2002, 22:57

I wonder if the thermostat on the evaporator is malfunctioning. I would check that first or there might be a build up of resistance on a dry joint somewhere causing the clutch to pull in and out.

Mike Arnold · Sep 20th, 2002, 21:54

My (expensive) experience of a/c is that if the compressor is cycling quickly (ie more than 15sec at a time) then you are low on gas - unless you are in the middle of winter. Most Volvo a/c systems leak like sieves so you are not alone.

Ex-Yorkshire man now in Manchester!

Sep 10th, 2002, 14:28	#1
Networkguy Senior Member Last Online: Sep 20th, 2022 19:25 Join Date: Nov 2000 Location: Lincolnshire	Yet another aircon question On my 98' S70, the aircon has suddenly started doing strange things. After the car has been driving for a while, you can hear the aircon click on and then off (at about 1 second intervals) constantly. If I switch the aircon off then back on, it stops for a while then starts doing it again. When driving slowly whilst it is doing it, you can feel the load on the engine as it turns on and off etc. I had the system serviced and charged at the main dealer in May and a full service in July. On top of this, the aircon seems to be working as it is blowing very cold air into the car. Now I have booked it into the dealer but they are wanting to re gas the system before they can do anything with it which I am non too happy about as I only had it done a few months back. Does anybody have any clues on this? Thanks

Sep 15th, 2002, 22:57	#2
pettaw Forum Support Team Last Online: Jul 23rd, 2023 15:29 Join Date: Jan 1970 Location: Glasgow, London	RE: Yet another aircon question I wonder if the thermostat on the evaporator is malfunctioning. I would check that first or there might be a build up of resistance on a dry joint somewhere causing the clutch to pull in and out.

Sep 20th, 2002, 21:54	#3
Mike Arnold Master Member Last Online: Apr 15th, 2024 11:47 Join Date: Dec 2001 Location: Stockport, Gtr Manchester View Photos By: Mike Arnold	RE: Yet another aircon question My (expensive) experience of a/c is that if the compressor is cycling quickly (ie more than 15sec at a time) then you are low on gas - unless you are in the middle of winter. Most Volvo a/c systems leak like sieves so you are not alone. Ex-Yorkshire man now in Manchester! __________________ Mike Arnold. 1966 122S

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