S70 Air Conditioner Problem

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Larry - 14 Jul 2005 02:51 GMT

I have a 2000 Volvo S70. It is about 100 degrees out and the air
conditioner works normally for about ten minutes. Then the compressor
stops cycling and it blows warm air. If the car is left sitting with
the engine off for about 15 minutes then the air conditioner works
normally again for about ten minutes. The car does not seem to be over
heating.

Any ideas anyone?

...Larry

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shaun - 14 Jul 2005 10:03 GMT

> I have a 2000 Volvo S70. It is about 100 degrees out and the air
> conditioner works normally for about ten minutes. Then the compressor
[quoted text clipped - 4 lines]
>
> Any ideas anyone?

Could be unrelated but had a similar problem with my S80 a couple of weeks
ago. Turned out the engine cooling fan had gone bad - one (free) replacement
later and all sorted.

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Tim.. - 14 Jul 2005 11:58 GMT

> I have a 2000 Volvo S70. It is about 100 degrees out and the air
> conditioner works normally for about ten minutes. Then the compressor
> stops cycling and it blows warm air. If the car is left sitting with
> the engine off for about 15 minutes then the air conditioner works
> normally again for about ten minutes. The car does not seem to be over
> heating.

Most likely the thermo cutout on the compressor- this is a well known fault.
Convieniently you can bypass the cutout by unplugging each end of it, and
then joining the two together- they're bullet connectors. Easy peasy.

Tim..

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Larry - 14 Jul 2005 15:56 GMT

> > I have a 2000 Volvo S70. It is about 100 degrees out and the air
> > conditioner works normally for about ten minutes. Then the compressor
[quoted text clipped - 8 lines]
>
> Tim..

I know where the compressor is, where is the thermal cut out? Is it
located on the compressor?

...Larry

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Larry - 14 Jul 2005 16:47 GMT

> > I have a 2000 Volvo S70. It is about 100 degrees out and the air
> > conditioner works normally for about ten minutes. Then the compressor
[quoted text clipped - 8 lines]
>
> Tim..

I looked at the compressor. There is a wire coming out of the harness
that goes to a simple connector. Then the wire goes directly to the
clutch.

....Larry

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StaffBull - 18 Jul 2005 21:09 GMT

Hi could you give me more details of where how to do this - my V70 does the
same thing, thanks

>> > I have a 2000 Volvo S70. It is about 100 degrees out and the air
>> > conditioner works normally for about ten minutes. Then the compressor
[quoted text clipped - 15 lines]
>
> ....Larry

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Mike F - 14 Jul 2005 13:24 GMT

> I have a 2000 Volvo S70. It is about 100 degrees out and the air
> conditioner works normally for about ten minutes. Then the compressor
[quoted text clipped - 6 lines]
>
> ...Larry

First you have to make sure the fan is working properly. If either the
coolant temperature gets too high, or the high pressure on the A/C gets
too high, then the computer will shut the A/C off. Then make sure air
can flow through the rad and condenser (not block by leaves or
garbage). Unfortunately, after that you need to hook it up to fancy
electronic tools to check what various sensors are reporting.

Signature

Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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Larry - 14 Jul 2005 16:48 GMT

> > I have a 2000 Volvo S70. It is about 100 degrees out and the air
> > conditioner works normally for about ten minutes. Then the compressor
[quoted text clipped - 13 lines]
> garbage). Unfortunately, after that you need to hook it up to fancy
> electronic tools to check what various sensors are reporting.

The fan does cycle off or on. There are no blockages to the air flow.I
am told there is a thermal cut out on the compressor but I can't find
it. There is simply a wire from the harness through a connector to the
clutch.

...Larry

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Mike F - 15 Jul 2005 13:13 GMT

> The fan does cycle off or on. There are no blockages to the air flow.I
> am told there is a thermal cut out on the compressor but I can't find
> it. There is simply a wire from the harness through a connector to the
> clutch.
>
> ...Larry

That thermal cutout was eliminated because of the problems it was
causing. It's not present in either of my '98s.

Signature

Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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