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Old 07-13-2005, 21:02   #1 (permalink)
Larry
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S70 Air Conditioner Problem

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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Old 07-14-2005, 09:02   #2 (permalink)
shaun
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Re: S70 Air Conditioner Problem


"Larry" <someone@somewhere.com> wrote in message
news:MPG.1d3f64cbd0901448989681@newsgroups.comcast.net...
> 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?


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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Old 07-14-2005, 09:02   #3 (permalink)
Tim..
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Re: S70 Air Conditioner Problem


"Larry" <someone@somewhere.com> wrote in message
news:MPG.1d3f64cbd0901448989681@newsgroups.comcast.net...
> 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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Old 07-14-2005, 09:02   #4 (permalink)
Mike F
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Re: S70 Air Conditioner Problem

Larry wrote:
>
> 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


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.

--
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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Old 07-14-2005, 18:02   #5 (permalink)
Larry
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Re: S70 Air Conditioner Problem

In article <db5gh6$ek4$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com>,
the.farm.hates.spam@btinternet.com says...
>
> "Larry" <someone@somewhere.com> wrote in message
> news:MPG.1d3f64cbd0901448989681@newsgroups.comcast.net...
> > 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..
>
>
>

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

....Larry
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Old 07-14-2005, 18:02   #6 (permalink)
Larry
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Posts: n/a
Re: S70 Air Conditioner Problem

In article <db5gh6$ek4$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com>,
the.farm.hates.spam@btinternet.com says...
>
> "Larry" <someone@somewhere.com> wrote in message
> news:MPG.1d3f64cbd0901448989681@newsgroups.comcast.net...
> > 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..
>
>
>

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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Old 07-14-2005, 18:02   #7 (permalink)
Larry
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Posts: n/a
Re: S70 Air Conditioner Problem

In article <42D65997.AB855ABA@allsttream.nett>, Mike F <"mikef2316
()"@allsttream.nett> says...
> Larry wrote:
> >
> > 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

>
> 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.
>

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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Old 07-15-2005, 07:02   #8 (permalink)
Mike F
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Posts: n/a
Re: S70 Air Conditioner Problem

Larry wrote:

> 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.

--
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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Old 07-19-2005, 02:02   #9 (permalink)
StaffBull
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Posts: n/a
Re: S70 Air Conditioner Problem

Hi could you give me more details of where how to do this - my V70 does the
same thing, thanks
"Larry" <someone@somewhere.com> wrote in message
news:MPG.1d4028d2e507e0ff989684@newsgroups.comcast.net...
> In article <db5gh6$ek4$1@nwrdmz03.dmz.ncs.ea.ibs-infra.bt.com>,
> the.farm.hates.spam@btinternet.com says...
>>
>> "Larry" <someone@somewhere.com> wrote in message
>> news:MPG.1d3f64cbd0901448989681@newsgroups.comcast.net...
>> > 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..
>>
>>
>>

> 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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