volvo 850 96 air con question

[col]

hi

have noticed that my air con is not very cold, when switched to max
cold, its no better on climate as well, i know most of the system
needs a air con specialist, but could it be short of refrigerant?


any help greatfull
col

 

[Niels Bengaard]

have noticed that my air con is not very cold, when switched to max

cold, its no better on climate as well, i know most of the system
needs a air con specialist, but could it be short of refrigerant?

Normally its lack of refrigerant. If the compressor goes on and off shortly
after you need a refill.

Niels

 

[col]

Normally its lack of refrigerant. If the compressor goes on and off shortly
after you need a refill.

Niels

thanks for the info, when the car is stopped but engine idling, the
compressor cuts in and out about every 5 seconds, with the aircon
on,is that low refrigerant?

colin

 

[Niels Bengaard]

thanks for the info, when the car is stopped but engine idling, the

compressor cuts in and out about every 5 seconds, with the aircon
on,is that low refrigerant?

yes, thats a normal sign of low refrigerant

Niels

 

[Graefaxe]

yes, thats a normal sign of low refrigerant

Niels

I have the same issue with a '95. I hooked up a pressure guage and get
reading of between 25 and 45 psi. What should it be with a full charge?

 

[Mike F]

I have the same issue with a '95. I hooked up a pressure guage and get
reading of between 25 and 45 psi. What should it be with a full charge?

The pressure is regulated with a switch that turns the compressor on and
off based on that pressure. The compressor is turned off at 25 psi,
when the pressure to rises to 45 the compressor is switched back on. It
doesn't matter how little refrigerant is present, as long as there's
enough to start the compressor, this is how it will work, so you can't
set the charge by this pressure. The fact that it's cycling quickly
indicates a low charge, so adding some will make it better, but if you
get too much in there, liquid can get into the compressor, ruining it.
The only accurate way to fill the system is to take it all out and put
in the correct weighed amount.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
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