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i have been having a few problems with the air conditioning lately. the blower works fine however the air coming from it is relatively warm. it gets a bit cold once in a while but nothing to what it used to do. any suggestions on what might be the problem? thanks in advance!
 

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Discussion Starter · #3 ·
i'm assuming this is a relatively easy fix? bring it to a garage and have the guy recharge the freon gas or whatever it is? thanks!
 

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Your freon is probably low; go to autozone or some other car parts place, and buy a kit w/ an pressure gauge attached, and ask for details about the specific pressure.
 

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Yup, listen to see if the clutch is engaging for the compressor. You can jumper the pressure switch if the compressor isn't engaging to defeat the low pressure logic. If the compressor then runs but blows no cold air, you are out of charge. Simple test.
 

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94escortmodsman said:
Your freon is probably low; go to autozone or some other car parts place, and buy a kit w/ an pressure gauge attached, and ask for details about the specific pressure.
Excessive pressure can cause the same symptoms as well. I just got my Escort and the AC wasn't blowing cold. I hooked up my manifold gauge set (After replacing the blown AC fuse) and was getting low side pressure at about 85psi and high side pressure topping out at something approching 500psi, which blew out one of the o-rings in my gauge set. the car probably lost about a can of r134a before I could get everything capped off.

After getting the pressures in line the ac blows cold, although I need to clean the condenser since I'm still getting medicore temp at low speeds, that and verify the fan is functioning correctly.

Pat
 

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Digging deap to find threads.

So the A/C in my 91 GT doesn't blow cold at all.

I've charged the system.

Blower works just fine.

Compressor comes on but it goes on and off. When it comes on it shakes everything then it goes off and the idle is fine.

It is so effing HOT in South Texas.

I have a spare compressor off of my other GT if the compressor is junk.
 

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I'm having the same exact problem. I have 2002 SPI. It blows cold, then regular air, then cold... sometimes it doesnt blow cold for a while and this is usually when it's pretty hot out. PITA!!! I rented a gauge set from Autozone and I'm going to check pressures this weekend. It could also be the low and high pressure switches. I doubt it's the CCRM since all that does is control the power flow based on inputs from the switches and pcm. The fact that it's intermittent makes me think it's a low charge. I bought the ford shop manual and it has some really nice graphs that show the acceptable pressures based on ambient temperature. I'll let you know what I find on mine. eautorepair.net also has the same graphs and procedures.
 

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^It could still be the CCRM. A cracked solder joint can act like that.
 

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But the a.c. system on your car is fundamentally the same as on the other Escorts.
It could be an orifice tube that is partly clogged (and the high side freon pressure get too high and the compressor shuts down), or a compressor that has worn valves or just has too much muck in it from the deteriorated rubber lining of the hoses or deteriorated lubricant (and the compressor isnt really pumping the freon around very well), or having either too little lube for the compressor, or too much. More likely its a combination of things.

When the compressor is running you can expect the serpentine belt to be whipping a little ibt. The tensioner arm will likely be shaking when the compressor is on, but should be fairly 'still' under a normal idle.

We have had a hot summer here in the northeast. Today in Fairfax County VA its supposed to be 101, with no breeze worth mentioning.
 

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@madmatt. I suppose it could be a cracked contact, but the way the cold air goes and comes is fairly constant. In my case and the original poster I doubt it would be a broken solder joint since that is less predicable and would depend on the right vibrations, bumps, etc to make and break the connection.

I put the gauge on my car and it seems like it's either the pressure cut out switch, low pressure switch or the a clogged evaporator orifice. I'm going to redo the test when it's hot since that's when it performs the worst. by the way it was about 73 deg out when i did the test and I was getting too high a pressure for the high end and too low pressures at the low end at that temp. I was getting 20psi low and upwards of 280psi. at 73 though the pressures should be at least above 30psi and the high pressure should be below 220 or so.
 

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stanged1970 said:
@madmatt. I suppose it could be a cracked contact, but the way the cold air goes and comes is fairly constant. In my case and the original poster I doubt it would be a broken solder joint since that is less predicable and would depend on the right vibrations, bumps, etc to make and break the connection.
Not always true. I worked on a stereo receiver for a friend that would cut out once it started to heat up. It was cracked solder joints on the amp chip. I resoldered them its it has been fine since.
 
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