Air conditioning

Tiny
DAVIDY2585
  • MEMBER
  • FORD RANGER
I have a 97 ford ranger 103,000 miles 4 cylinder manual. My AC works fine going down the road. When I stop the engine idles down and my compressor stops running.
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Friday, February 23rd, 2007 AT 2:51 PM

4 Replies

Tiny
MATHIASO
  • MEMBER
It's look like the clutch is not engaging when the engine idles.
Have a voltage test done on the clutch terminal and find out if you get 12 DC volt on the coil.
And let me know
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Friday, February 23rd, 2007 AT 8:22 PM
Tiny
NOS
  • MEMBER
I was think of a bad cycling switch. At idle the head pressue is not up so the switch is kicking the compressor off. Could also be a little low on freon, where it won't keep the switch inguaged. Hope this helps. Will follow this one more 8) NOS
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Saturday, February 24th, 2007 AT 3:32 PM
Tiny
BHUGG
  • MEMBER
Does the compressor stop running or is it just not providing any cooling?
You can look under the hood to see if the compressor is working. The clutch only spins when the system wants cooling.
If the compressor is working, then you probably are low on refrigerant. The compressor only works as hard as the engine. If you are low on refrigerant, you woun't get much cooling at idle.
If the compressor isn't spinning, follow the instructions provided by "mathiaso" and "NOS".
Working with refrigerant can be dangerous if you don't know what you are doing.

Check all this out and get back to the forum.

If our suggestions work, or even if they don't, let us know. Vote for us if you think we deserve it.
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Sunday, February 25th, 2007 AT 10:42 AM
Tiny
MATHIASO
  • MEMBER
I agree with you guys ( Nos and bhugg)
it's dangerous to work on air conditioning for the home mechanic.


http://www.2carpros.com/forum/automotive_pictures/46384_scan_6.jpg


The cycling pressure has contacts that remain closed until the presure reachs about 24.5 psi.They remain open untill the presure rises to about 47 psi, at wich point they close again to re-energize the clutch.
My question is: Is it really enough refrigerant in the system?
My second question is what happen when a fused jumper is placed across the switch's contact?
I want to know if the clutch energize.
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Sunday, February 25th, 2007 AT 11:04 AM

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