1993 Explorer.A/C is full of hot air and in hot water.

Tiny
JUSTPASSINTHRU2K
  • MEMBER
  • 1993 FORD EXPLORER
1993 Ford Explorer, V-6 (4.0) 185K miles, automatic, 4-wheel drive. A couple problems which all may be related. The A/C is fully and properly charged with R134-A (converted over from R-12). At hiway speeds, a/c is cold but not as cold as it could/should be and engine temp is basically normal. When done with hiway and driving the local stop and go streets, a/c temp warms up. Say about 15 degrees below the outside air temp and the engine temp is very hot. Temp gauge is now centered between "H" of overheating and midway of the gauge. (Like 3/4 of a tank of gas or a little higher) While sitting at a light, air out of vents gets oven warm, maybe equal to outside temp. Once u start driving, the a/c air begins to get a little cooler (slowly). All above info is during daylight hours. At night, the a/c gets colder and the engine temp comes down as well. Next part.I noticed today that while I was driving, heater control (manual) is off and temp control all the way to the left (cold) I am feeling warm/hot air coming out my a/c vents. Feel nothing at stand still and the faster I drive, the stronger the airflow coming out of the vents. I am thinking that maybe some door that should be closing on the heater box, is not fully closing or visa-versa with opening but not fully opening. In 2006 I had the a/c's heater core, think its called the evaporator replaced because of broken tubes which left the system open to the atmosphere for about a year. A/c was not very cold so the receiver dryer was replaced (the aluminum canister) to correct that. It really didn't seem to improve it much. Not sure if the orifice tube was replaced. Not sure where the orifice tube really is. Would the orifice be located in either of these 2 parts? I am hoping that all these symptoms share a common solution. Any suggestions you can offer me would be GREATLY APPRECIATED, seeing that I am burning up from all this hot air.

Ray
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Saturday, August 4th, 2007 AT 2:07 AM

5 Replies

Tiny
JUSTPASSINTHRU2K
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Well thank u for the advice and I will try that first and get back to you!
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Saturday, August 4th, 2007 AT 9:30 AM
Tiny
JUSTPASSINTHRU2K
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What about the issue of the warm/hot air coming thru my a/c vents when all controls are off. The faster I drive the harder the air comes thru the vents?

Thanks
Ray
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Saturday, August 4th, 2007 AT 10:44 AM
Tiny
JUSTPASSINTHRU2K
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Ok. I cleaned out the radiator and condenser but I must admit that not much debris was present. I hosed it all out well and with a lite behind the radiator I made sure that I saw thru both cores. Everything is clean. Now the truck still runs hot. I just had to replace the a/c compressor due to it no longer putting out pressure. Got it down to 35.5 degrees with an outside air temp of 70. Getting back 2 the running hot. How do u test a clutch fan? I can stop the fan with the engine running and hold it there in place with one of my hairs across a blade. No resistance. What is your next suggestion?

Thanks,
Ray
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Friday, August 10th, 2007 AT 5:05 PM
Tiny
JUSTPASSINTHRU2K
  • MEMBER
Hi. Ok, replaced the fan clutch and engine seems to run cooler. I hear the fan now when starting off from a stop and then it quiets down after the RPM's come up a little. No 90 degrees here anymore so when it comes, that will be the true test. When not using the a/c, the engine is running VERY cool. Now I would like to address the hot air coming out of the a/c vents under acceleration when all the heat/ac controls are off. I cannot seem to find the vacuum canister to test and see if it is holding vacuum. Any ideas?

Thanks
Ray
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Thursday, August 16th, 2007 AT 8:01 AM
Tiny
JUSTPASSINTHRU2K
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Hi, I am waiting to hear back from you. I posted my results a week ago.

Thanks
Ray
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Thursday, August 23rd, 2007 AT 5:14 PM

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