C4 A/C not working plz help!
Thread Starter
4th Gear
Joined: Aug 2014
Posts: 4
Likes: 0
C4 A/C not working plz help!
I have a 95 vette C4
A/C was working 2 days ago no problems and poof. Won't turn on nothing! Checked freon is full and compressor or clutch kicks in but still no air. Even disconnected the battery. I have no clue why it would stop all of a sudden. Remind you I'm in San Antonio, Tx and today it's 105!
Please help.
email me or msg me with info
A/C was working 2 days ago no problems and poof. Won't turn on nothing! Checked freon is full and compressor or clutch kicks in but still no air. Even disconnected the battery. I have no clue why it would stop all of a sudden. Remind you I'm in San Antonio, Tx and today it's 105!
Please help.
email me or msg me with info
Thread Starter
4th Gear
Joined: Aug 2014
Posts: 4
Likes: 0
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Is the blower motor coming on? The fan in side blowing air thru the dash vents?
What do u mean u checked the freon and its o.k.? What did u check and what did u get?
What do u mean the clutch is working?
U have to be clear here, Dude Are you saying pressures r equalized with the motor off and when u start the motor the a/c cxlutch engages and starts to try and pull into vacuum? and then cycles? and its sweating and dripping under the car? but u have no inside blower or ru just going to say u checked everything and its 150 out Help again???????????????/
What do u mean u checked the freon and its o.k.? What did u check and what did u get?
What do u mean the clutch is working?
U have to be clear here, Dude Are you saying pressures r equalized with the motor off and when u start the motor the a/c cxlutch engages and starts to try and pull into vacuum? and then cycles? and its sweating and dripping under the car? but u have no inside blower or ru just going to say u checked everything and its 150 out Help again???????????????/
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Do this test:
That will tell you if the compressor is working OK.
You can perform diagnostics on the HVAC control panel to see what's happening with the system:
http://forums.corvetteforum.com/1585305121-post2.html
That will tell you if the compressor is working OK.
You can perform diagnostics on the HVAC control panel to see what's happening with the system:
http://forums.corvetteforum.com/1585305121-post2.html
Thread Starter
4th Gear
Joined: Aug 2014
Posts: 4
Likes: 0
Is the blower motor coming on? The fan in side blowing air thru the dash vents?
What do u mean u checked the freon and its o.k.? What did u check and what did u get?
What do u mean the clutch is working?
U have to be clear here, Dude Are you saying pressures r equalized with the motor off and when u start the motor the a/c cxlutch engages and starts to try and pull into vacuum? and then cycles? and its sweating and dripping under the car? but u have no inside blower or ru just going to say u checked everything and its 150 out Help again???????????????/
What do u mean u checked the freon and its o.k.? What did u check and what did u get?
What do u mean the clutch is working?
U have to be clear here, Dude Are you saying pressures r equalized with the motor off and when u start the motor the a/c cxlutch engages and starts to try and pull into vacuum? and then cycles? and its sweating and dripping under the car? but u have no inside blower or ru just going to say u checked everything and its 150 out Help again???????????????/
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Jump the High blower relay and it will force the blower to come on high/full blast thru the dash vents then u can play around with the a/c on high and cooling the inside of ur car while u diagnose this
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Read this
http://forums.superchevy.com/corvett...c-heat-blower/
http://www.corvetteactioncenter.com/...-solution.html
http://forums.superchevy.com/corvett...c-heat-blower/
http://www.corvetteactioncenter.com/...-solution.html
Last edited by cudamax; Aug 9, 2014 at 12:50 PM.
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Okay, time to get the tester out - you can use either a test light or a multimeter.
There should be five wires at the relay: red, orange, dark blue, purple, and black. The red wire should show power at all times (battery source). The black wire should be ground. The orange wire should show power when the ignition switch is on and the fan switch is on high. The dark blue wire should show different voltages depending on the fan switch position (if using a test light, the light should start dim and get brighter as you switch to higher fan speeds). The purple wire goes to the fan motor - we know it's okay because you said the fan works when you jump the relay.
Now, depending on what results you get from those tests, we can determine if the switch, resistor, or wiring is the problem (or at least which one is the next to investigate).
__________________
There should be five wires at the relay: red, orange, dark blue, purple, and black. The red wire should show power at all times (battery source). The black wire should be ground. The orange wire should show power when the ignition switch is on and the fan switch is on high. The dark blue wire should show different voltages depending on the fan switch position (if using a test light, the light should start dim and get brighter as you switch to higher fan speeds). The purple wire goes to the fan motor - we know it's okay because you said the fan works when you jump the relay.
Now, depending on what results you get from those tests, we can determine if the switch, resistor, or wiring is the problem (or at least which one is the next to investigate).
__________________
Burning Brakes
Joined: Mar 2013
Posts: 1,131
Likes: 5
From: Illinois/Wisconsin Line
Thread Starter
4th Gear
Joined: Aug 2014
Posts: 4
Likes: 0
Cause the video you attached the audio is garbled and sounds foreign and shows a tpi engine not a LT1 thanks
Instructor
Joined: Apr 2013
Posts: 104
Likes: 2
From: Greenville SC
My 96 LT1 did this to me as well. There was freon in it, and you could see and hear the clutch engaging, but no cold air. The rubber hub in the clutch broke free from the clutch hub. When the compressor engaged, it looked like the clutch was turning the compressor, but really it wasn't..
Take a closer look at the clutch and make sure the compressor is really turning when it engages. That's what made mine quit.
Take a closer look at the clutch and make sure the compressor is really turning when it engages. That's what made mine quit.