1997 A/C Not working!
#1
Join Date: May 2005
Location: New Kensington, PA
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1997 A/C Not working!
Not on my truck, but my friends 97, his A/C stopped working the other day. The compressor does NOT turn on; we checked every A/C fuse in the manual, along with every other fuse in the truck. All fuses are good and the compressor still does not work!
What are the other options on fixing this? Any help?! Please!
Shouldn't matter, but his truck is a 4.0L.
I searched on here for an answer but came up with nothing.
What are the other options on fixing this? Any help?! Please!
Shouldn't matter, but his truck is a 4.0L.
I searched on here for an answer but came up with nothing.
#2
When you turn the climate controls to AC; there should be signal voltage going to the compressor clutch. IF not... you need to find the LPS (low pressure safety switch) and disconnect the connector. The LPS is a safety feature so that the compressor will not run when the systems refrigerant pressure is low which indicates a leak in the system. Measure resistance (ohms) across the terminals to see if there is continuity. If there is continuity and the compressor does not start; the coil energizing the clutch may not be functioning. If there is NO continuity.... then the system is LOW on refrigerant. To test this... Put a jumper wire in the the two terminals of the connector removed from the LPS and then turn the AC on... IF the compressor clutch engages.... this verifies the problem.
OR 4x4
OR 4x4
#3
#4
#7
#8
YES...... A bad relay can certainly stop the compressor clutch from engaging.... The relay contacts can get pitted or corroded and the coil that pulls the contacts in can go bad over time....
Locate the relay, turn the climate controls to AC and check voltage at the relay. The should be a constant 12V source and a switch 12V source coming from the climate controls.... IF both are present when the climate control are set to AC and you still are not getting voltage to the compressor clutch, then the relay is more than likely the problem. IF you donot have the 12V switched power, then check the LPS as I previously posted.
Refrigerant is not hard to add to the system, but..... adding it in the correct amount requires a gauge manifold and at least one thermometer to see what the discharge air temperature is at the vents....
Most automobile systems even when empty; ONLY require about 1.5 lbs or refrigerant.
After 1993 most automobiles built use R 134a instead of the older R 12 which was phased out due to Global Warming and the depletion of the Ozone Layer.
OR 4x4
Locate the relay, turn the climate controls to AC and check voltage at the relay. The should be a constant 12V source and a switch 12V source coming from the climate controls.... IF both are present when the climate control are set to AC and you still are not getting voltage to the compressor clutch, then the relay is more than likely the problem. IF you donot have the 12V switched power, then check the LPS as I previously posted.
Refrigerant is not hard to add to the system, but..... adding it in the correct amount requires a gauge manifold and at least one thermometer to see what the discharge air temperature is at the vents....
Most automobile systems even when empty; ONLY require about 1.5 lbs or refrigerant.
After 1993 most automobiles built use R 134a instead of the older R 12 which was phased out due to Global Warming and the depletion of the Ozone Layer.
OR 4x4
#9
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I tried a different relay on his truck that I took off of my truck to see if it was his relay, and nothing happened still.
We're going to fill up the refrigerant this weekend, he said he put only one small can in when he filled up a few weeks ago; and if it was/is empty, one small can will not be enough at all.
We're going to fill up the refrigerant this weekend, he said he put only one small can in when he filled up a few weeks ago; and if it was/is empty, one small can will not be enough at all.
#10
#11
bringin this back up, i just bought some freeon for mine, and when i went to put it in, the level was just above recomemded, but i put a lil more in and bumper it to about 40psi, i think. But my compressor still goes crazy. Some im thinkin bad compressor. it comes on and then goes off real quick, and the air is semi cool, but thats not acceptable here in fla.
so my question is, what other vehicles/engines are the a/c compressors for our trucks compatible? ive got a 2.3L.
so my question is, what other vehicles/engines are the a/c compressors for our trucks compatible? ive got a 2.3L.
#12
HI, I JUST JOINED THIS FORUM. MY 96 RANGER 4CYL. HAS SAME A/C PROBLEM. COMPRESSOR CYCLING ON/OFF CONSTANTLY. YOU SUGGESTED TO TOTALLY EMPTY THE SYSTEM OF FREON THEN REFILL. CAN I DO THIS OR CAN A SHOP ONLY EMPTY THE SYSTEM. IF I CAN HOW DO I GO ABOUT IT ?
#13
So I know this is my first post and that this is resurrecting a VERY old thread....but I am definitely in need of some help here.
I traced the wiring for my compressor and there is no power at the plug to the compressor. I jumped the LPS and I am getting a -13.98 or so on the multi meter. Andyone have any suggestions?
I traced the wiring for my compressor and there is no power at the plug to the compressor. I jumped the LPS and I am getting a -13.98 or so on the multi meter. Andyone have any suggestions?
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