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AC not working

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Old 04-10-2010
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AC not working

I checked the other thread and I'm pretty sure I still have the clutch for my ac compressor, but it's not turning on. I get air, just not cold air. And when the ac got cold I had the noticeable difference in power, so I'm pretty sure the compressor isn't turning on. What's the standard checklist of things to be wrong in this situation?
 
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Old 04-10-2010
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Did you make sure you still have freon? Check for leaks?
 
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Old 04-10-2010
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Already tried that, charged it and nothing.
 
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Old 04-10-2010
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interesting....( that means i'm stumped)
 
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Old 04-10-2010
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haha thanks, Could it be bad that I tried charging it with the compressor apparently not working?
 
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Old 04-10-2010
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I don't think so, it just means the freon isn't going anywhere else in the truck
 
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Old 04-12-2010
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Also when I have the ac or fan on I hear a weird noise from bottom, drivers side dash. It sounds like some leaves got in wherever the fan is and it's hitting them. How hard would it be to get them out?
 
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Old 04-12-2010
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With the a/c on check the plug and see if you have power to the clutch. If so you have a bad clutch. If not jump out the pressure switches. The one by the battery is the high pressure switch and the one by the evaporator is the low pressure switch. If its not either of those it could be a blown fuse or a bad heater control in the dash.
 
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Old 04-12-2010
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Originally Posted by wvcat View Post
With the a/c on check the plug and see if you have power to the clutch. If so you have a bad clutch. If not jump out the pressure switches. The one by the battery is the high pressure switch and the one by the evaporator is the low pressure switch. If its not either of those it could be a blown fuse or a bad heater control in the dash.
what john said! and the rustling is like you said just leaves or somthing in your blower motor just take it out and clean its not hard only 3 screws i think!
 
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Old 04-13-2010
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Well I did get the leaf out of the fan, which is very good news considering I was about to go crazy from that sound.

On the AC side I checked the power going to the compressor and it read 0volts. But I'm not sure if I was reading from the correct plug, below is a picture of the plug I tried.
 
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Old 04-13-2010
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Yeah thats the right plug. If you put power to the compressor terminals it should run...
 
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Old 04-13-2010
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So the problem is in the cable, therefore what's the possible problems besides the cable being cut?
 
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Old 04-13-2010
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Low Pressure switch- won't run if pressure is too low-Unlikely because you said it has freon
High Pressure switch- wont run if pressure is too high-Unlikely, usually shuts off the compressor when running pressure is too high
Bad heater control- could be a bad switch-probably the issue
Compressor relay-could be bad-could be the issue
WOT cutout- could be a bad throttle position sensor-unusual...

Thats all I can think of
 
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Old 04-14-2010
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Bad heater control as in the switch in the dash? What's the easiest way to test that and the relay?
 
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Old 04-21-2010
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I have an older ranger a '93 and maybe u guys can help me out with a problem. When i turn on my AC the truck shakes like it's about to turn off. At first it had a slight shake when i turned on the defrost tried looking for a vacuum leak but found nothing. Any ideas? Does any one have a diagram of the vacuum lines?
 
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Old 05-12-2010
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It's finally getting hotter and I'm back to fixing this...

Checked today, the compressor works when I give it 12v. Checked the fuse and the w.a.c. relay (pretty sure that's the ac relay).

Is there anyway to check the heater control switch?
 
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Old 05-22-2017
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Had the same problem with my 95 Ranger, compressor would not come on. Strapped the low pressure switch leads together, no help, all connections looked good. Ran 12v from batt to compressor. Bingo...Had a check engine light code P-0118, Engine coolant temp sensor. Replaced sensor, $14, cured CEL , also AC works now, charged with 134 freon, blows cold...
 
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