Air conditioner blows hot

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
No, you need a test light that displays both power and ground. The lead will have two wire connections plus the probe.
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
ROBERT96THUNDERBIRD
  • MEMBER
  • 6 POSTS
I only have a probe with one wire and the pointed end.
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
TED45
  • MEMBER
  • 5 POSTS
  • 1997 FORD THUNDERBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 95,000 MILES
I have power to the fuse, but not the clutch. Does anyone know where I can get a wiring diagram? Does anyone know what the most common causes of this problem are?

Thanks
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Check that the A/C refrigerant level is correct, if low due to a leak, the low pressure switch will cut the power to the compressor.

Mark (mhpautos)
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I guess you won't be checking it yourself then.
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
TED45
  • MEMBER
  • 5 POSTS
There is no power to the clutch, so the compressor never starts. When the freon is low, the clutch will engage, the low pressure switch opens, and the clutch disengages. Then the switch closes and the clutch engages. This process cycles continuously.

Thank you for the reply.
Someplace the electric circuit is open.
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
ROBERT96THUNDERBIRD
  • MEMBER
  • 6 POSTS
If I can get my hands on one can you tell me exactly what to do next?
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Have you check that the refrigerant charge is full?

Mark
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I already told you. Find out whether it's power or ground that is missing from the motor.
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
TED45
  • MEMBER
  • 5 POSTS
How can I check the refrigerant level if I can;t engage the compressor to get pressure?
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
ROBERT96THUNDERBIRD
  • MEMBER
  • 6 POSTS
Well let me put it like this.

I don't know how to use a two prong test light so I need some explanation.

Do I connect to the two leads at the fan and touch the ground or do I connect at the two prong wire and connect to fan.

Im at a loss
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
IVGOTIT
  • MEMBER
  • 10 POSTS
  • 1997 FORD THUNDERBIRD
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I need to recharge my AC refrigerant. I believe the 97 uses r134a. However, I cannot find a recharge port with a blue cap. I found a port with a black cap that appears to be the recharge port but don't want to do anything until I am sure..

Does the 97 use R134A?

Is the port with the black cap (passenger side near side of radiator) the recharge port?

Thanks!

Kent
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It uses the R-134a freon-see below fittings for
identification -look around-You charge at the low side 13mm fitting


https://www.2carpros.com/forum/automotive_pictures/12900_ac_service_fittings_21.jpg

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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Jump a wire from the battery to the compressor clutch, if that will not work the comp or clutch is faulty.

Mark (mhpautos)
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
It connects to the battery.
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
IVGOTIT
  • MEMBER
  • 10 POSTS
Thanks so much! I think I will be able to find it tomorrow when the sun comes up!

I really appreciate the advice, Kent
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
ROBERT96THUNDERBIRD
  • MEMBER
  • 6 POSTS
I understand the concept of making a closed circuit. But I am lacking which way to go about it
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Look for the 13mm fitting this is the low side where you charge it
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
SCALEYDINO
  • MEMBER
  • 3 POSTS
  • 1997 FORD THUNDERBIRD
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
Ok here we go. I've done everything to this ac unit but can't get it to work, it's not low on freon, pressures are fine low pressure and high press, cut off are fine. Clutch coil, compressor, are fine ac heat switch in car is fine. I checked everything, jump wrong the low pressure switch didn't work. Pulling PCM didn't work have power going into PCM good, ccrm blk/ yl has power coming from ccrm but it stops about a foot away have complete continuity through circuits. I have b+ at ccrm, PCM, low pressure switch high pressure switch, but nothing in wire going to compressor. I can jump compressor and it works fine. The damper doors seem to work although I have tested used and new switches. I'm going crazy. Nothing makes sense. All fuses are good I can hear the ccrm contacts working. Is there a relay somewhere. Power panel in engine doesn't have one for ac just a horn relay it seems to be. Is it somewhere else. Again have inputs where they need to be but the blk/ yl Eire coming from ccrm has power but only for a short distance. Help me please
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)
Tiny
FREEMBA
  • MECHANIC
  • 1,152 POSTS
Check the blk/ yl Eire coming from ccrm where the power stops (disappears). The wire may be broken there. Flex the wire by hand to "feel for a break.
Or, with the battery disconnected, use an ohmmeter to check continuity in that area of the wire. Push a straight pin through the insulation of the wire at the last point where you had power. Push another one through the insulation about a foot away from that point. Connect the ohmmeter to the pins. If there is a break there will be no reading on the ohmmeter. Wiggle the wire during the test (because there could be a bare part of the wire touching the body of the vehicle.)
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Tuesday, July 9th, 2019 AT 12:19 PM (Merged)

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