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mrblalock66
New User
Jun 24, 2011, 2:31 PM
Post #1 of 7
(2623 views)
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I have a 97 2dr tahoe and the a/c unit will not light up the recycle or ac switch on the dash. It will however move the air flow up and down in the cab. In addition the clutch would not engage but when twelve volts was applied it came on. All fuses are good and when I added a can of freon the clutch began cycling but no lights on the ac or recycle switch. What have I overlooked?
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 24, 2011, 3:08 PM
Post #2 of 7
(2613 views)
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Re: A/C Not working
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If it's an auto temp control system you might try disconnecting the battery. It sounds like it may have set a low refrigerant code and shut down. It probablyt needs to be recharged and look for the leak.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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mrblalock66
New User
Jun 24, 2011, 6:34 PM
Post #3 of 7
(2602 views)
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Re: A/C Not working
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The system is not an auto temp system. I replace the dash switch module and added one can of freon and the clutch at least cycles now but no lights and it doesnt seem to be cooler. Could the switch under the passenger side dash have any relation to the lights not coming on? I am good at wiring and have even replaced the plug that notoriously get hots and tends to melt over time. Any suggestions?
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 24, 2011, 6:37 PM
Post #4 of 7
(2599 views)
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Re: A/C Not working
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If adding refrigerant is getting results, finish charging the system with the proper amount and then worry about the lights.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 25, 2011, 9:09 AM
Post #5 of 7
(2580 views)
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Re: A/C Not working
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I haven't seen a single pressure or temp mentioned in this thread! Aimlessly blasting in refrigerant is nuts without knowing what it should be at what temperatures. If you overcharge it cooling will first fade in performance if all else was fine then up to and including possible damage but would usually quit again at some point,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 25, 2011, 12:03 PM
Post #6 of 7
(2570 views)
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Re: A/C Not working
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I advised him to charge it with the "proper amount". That means complete evacuate and recharge.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 25, 2011, 1:08 PM
Post #7 of 7
(2565 views)
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Re: A/C Not working
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I'm going on that if they are here they wouldn't know what "proper" was
T
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