Question about 2005 Chevrolet Equinox

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A/C not blowing cold air. Aluminum lines under hood have frost/ice on them.

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  • Anonymous Jul 25, 2008

    I have a 2005 Chevy Equinox LT. The a/c does not blow cold air. It does, but only when I'm going 70mph.

  • reebi1 Aug 06, 2008

    Bought this '05 brand new in July 2004 -- for past month, a/c only gets cold when going fast, finally, this past weekend car started squealing when a/c was on...dealership advised air compressor leaking on serpentine belt

    $1k later, ice cold air (btw, no longer under warranty!!)

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If you haven't already done so, check and see if you get hot air also. If not then your blower motor is not receiving the 12v it's suppose to get. if this is the problem please let me know.

Posted on Jul 25, 2008

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I can tell you general principles about A/C but have not worked on a Hyundai. If the A/C lines under the hood and directly from the black cylinder tank are frosted or sweating, you have Freon circulating.

There are 2 cutoff switches in all systems. A low pressure and high pressure cutoff. The ideal amount of Freon is in the middle of these 2 pressure points.
In this way the compressor clutch will stay engaged the longest and keep the Freon circulating the longest. This is the way you get COLD air.

There are ways to measure the pressure and to find leaks. You can sometimes loan tools from Autozone or Oreillys for a deposit. Before blaming another electrical problem for the lack of COLD air you should test the pressure of the Freon left in the system. If you are within 90 days or 3000 miles, most minimum warranties cover the parts. With factory warranty it should go farther.

In answer to your electrical concern, yes there is another system controlling the A/C. The ductwork has either vacuum operated or electrically operated doors (flaps) under the dash. These "doors" blend the airflow by mixing cold and hot air to give you the temperature you want. If you want all COLD you keep the heater door shut and so on.

So you look at these areas separately first. Under the hood is the Freon pressure good? Pipes sweating? Compressor clutch on steady? And if everything under the hood is good, then you look inside the car at the ductwork.

I hope this helps you.

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