Ac quit working
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Pro Wrench
Joined: Oct 2013
Posts: 1,511
Likes: 171
From: Central Minnesota
Ac quit working
97 D1, Had great AC all last summer, and this year, it doesn't seem to want to work.
AC compressor clutch doesn't engage,
Plenty of refrigerant, inside fan runs, fuse (#15) checks oK..
I had the HVAC control apart as the fan switch melted this last winter, and I replaced the switch with another, works good.
When I push the AC button (snowflake) it doesn't light up but feels like it is clicking on.
Hate to think about taking the dash apart again to check the switch but I think that is what I am up to now unless anyone has a suggestion??
AC compressor clutch doesn't engage,
Plenty of refrigerant, inside fan runs, fuse (#15) checks oK..
I had the HVAC control apart as the fan switch melted this last winter, and I replaced the switch with another, works good.
When I push the AC button (snowflake) it doesn't light up but feels like it is clicking on.
Hate to think about taking the dash apart again to check the switch but I think that is what I am up to now unless anyone has a suggestion??
Recovery Vehicle
Joined: Sep 2007
Posts: 823
Likes: 75
That sucks.
Isn't there a relay that runs the compressor?
Did you hook gauges up to check pressures? Could be a faulty pressure switch. Have you tried "jumping" the pressure switch to see if the compressor comes on ...and if it throws cooling (if so ...how much??)? (Check voltage at the clutch connector too)
Isn't there a relay that runs the compressor?
Did you hook gauges up to check pressures? Could be a faulty pressure switch. Have you tried "jumping" the pressure switch to see if the compressor comes on ...and if it throws cooling (if so ...how much??)? (Check voltage at the clutch connector too)
Thread Starter
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Pro Wrench
Joined: Oct 2013
Posts: 1,511
Likes: 171
From: Central Minnesota
Hooked up gauges and both sides look plenty full, at least enough to make the low pressure switch happy. Checked fuses and that was about all I could handle in the direct sunshine and 95+ degrees... Supposed to be cooler this week so the hunt continues..
Pro Wrench
Joined: Nov 2015
Posts: 1,935
Likes: 189
From: Coastal Georgia
More from Rave WM.
......
1. Incorrect voltage. 1. Check voltage.
2. Open or defective fuse or relay. 2. Check and replace as necessary.
B. 3. Defective thermostat control or 3. Replace thermostat or
COMPRESSOR pressure switch. pressure switch.
CLUTCH 4. Shorted or open field coil. 4. Replace coil.
INOPERATIVE 5. Bearing seized (clutch will not 5. Replace clutch pulley assembly.
disengage).
6. Refrigeration circuit problem causing
heavy load and excessive drive
torque.
6. Check and rectify.
2. Open or defective fuse or relay. 2. Check and replace as necessary.
B. 3. Defective thermostat control or 3. Replace thermostat or
COMPRESSOR pressure switch. pressure switch.
CLUTCH 4. Shorted or open field coil. 4. Replace coil.
INOPERATIVE 5. Bearing seized (clutch will not 5. Replace clutch pulley assembly.
disengage).
6. Refrigeration circuit problem causing
heavy load and excessive drive
torque.
6. Check and rectify.
Winching
Joined: Jun 2015
Posts: 553
Likes: 93
From: Huntsville, AL
Blower switch (Front Fan Speed Switch (X247)). Not the A/C switch. Mine was doing this as well.
A/C switch in, blower any position, light on A/C button should be lit.
I took apart the switch, cleaned slider surface and bars with "0" steel wool, dielectric grease it up, snap back together and it was good to go.
p.s. Be mindful of the little springs and detent thingy.
Now if I could get those pesky condenser fans to come on.....
A/C switch in, blower any position, light on A/C button should be lit.
I took apart the switch, cleaned slider surface and bars with "0" steel wool, dielectric grease it up, snap back together and it was good to go.
p.s. Be mindful of the little springs and detent thingy.
Now if I could get those pesky condenser fans to come on.....
Last edited by hrhoward; Jun 28, 2016 at 07:26 AM.
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