Question about 1994 Mercedes-Benz C-Class

2 Answers

AC Will not turn on in 1997 E320

I have a 1997 Mercedes Benz E 320. My problem is that my AC does not work. The reason is because there is no power going to the Air Compressor. The air compressor still works great when jumped by electric but shuts off as soon as the jumper cables are pulled off. I replaced the climate control panel but the red light on the EC button or the on and off switch for the Air Compressor is still lit so the control panel is not the problem. Any suggestions or thoughts?

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 6,784 Answers

HI. Here is a complete check list that will help you trouble shot thsi issue. You will find the problem in one or more of these areas stated below.

1. Check Drive Belts - The air conditioner utilizes a drive belt that supplies power to rotate the compressor, which is basically a refrigerant pump. If the belt fails the compressor has nothing to drive it, inspect and replace as needed to restore operation. If belt is intact proceed to the next step.

2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the system is low on refrigerant it could cycle on and off, making a ticking noise. If the compressor clutch is not turning proceed to next step.

3. Inspect for Refrigerant Leaks - If the system has a large leak and no refrigerant remains it will not activate. First test system for a static pressure charge, with the engine off attach an ac gauge to the low side pressure port and check the state of charge. Depending on outside temperature there should be between 50 psi and 80 psi. (Cool and warm). A refrigerant leak detector is needed to inspect for leak, but if you do not have a leak detector there is an alternative method. The air conditioner system is designed to run with oil suspended in the refrigerant to lubricate the system. Check for oily residue outside the system by inspecting all hoses, compressor, condenser, evaporator or receiver drier and replace any component that has failed.

4. Inspect Fuses - Check under dash panel and under hood power distribution center. Replace failed fuses as needed, recheck system. If the new fuse fails when reinstalled a short circuit is present and requires diagnosing with a wiring schematic, follow circuits to locate short, repair as needed and recheck system.

5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the temperature blend door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, insect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.

Posted on Sep 09, 2009

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Mercedes-Benz Master
  • 2,030 Answers

Heck and make sure the relay is good, and check to see that there is no corrosion on any of the connectors from the head unit to the compressor.
But my best guess with out checking it is there is a relay that has gone bad and is stuck

Posted on Sep 09, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1997 E-320. Why doesn't it start?


Do you have it in N -neutral?

97 E320 Engine Won't Start - MBWorld.org Forums

mbworld.org/forums/e-class.../298412-97-e320-engine-won-t-start.html
May 15, 2009 - Hello ladies and gents, I bought a 97 E320 on February with 82k miles on it. ... hours I got out of work and try to start the car, it cranks but the engine justwon't start running. ... Drives: 1997 s320, 1997 e320 ... Cognomen is in homage to the late great Janis Joplin "Oh lord won't you buy me a Mercedes Benz". 2003 E320 cranks but won't start...
Oct 20, 2013
E320 cranks over but won't start
Mar 9, 2013
HELP....KEY WONT TURN ,CANT START CAR
May 17, 2011
W210 won't start.
Feb 13, 2008
More results from mbworld.org

1997 E320 Wont Start - PeachParts Mercedes ShopForum

www.peachparts.com > ... > Tech Help
Jul 2, 2008 - My 97 E320 wont start. ... 1997 E320 Wont Start ... So, we know that any engine won't start if it has no spark or no gas, so that is where we have ...

1997 E320 Trouble Cranking - YouTube

? 0:31
https://www.youtube.com/watch?v=AJu0k_rRb_o
Apr 4, 2013 - Uploaded by Roy Carlsen
1997 E320 Trouble Cranking ... 1998 Mercedes E Class (E320)Start Up and Review 3.2 L V6 - Duration ...

Dec 10, 2015 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

Key won't turn to position 3?


Key won't turn ' Mercedes-Benz Club of America

www.mbca.org > Forum Home > Technical Forums > Technical Help
Oct 5, 2012 - 7 posts - ‎6 authors Two days ago, I put my key in the ignition and it wouldn't turn. I tried two or ... Joined: February 20th, 1997 ... It happened to my dad's 96 W210 E320. make sure when you change gears, especially back to P, push it hard. Top.

Jul 28, 2015 | Mercedes-Benz Cars & Trucks

1 Answer

I have 2005 Mercedes Benz e320 the slow down when the is ac is running


Sound like your ac clutch is sticking. Make sure your ac clutch is working properly. If so check your alternator.

Jul 24, 2014 | 2005 Mercedes-Benz Mercedes Benz E320 Cdi

1 Answer

320 CLK - Air Conditioner/Heater won't work . . . compressor dead?


probably burnt the compressor out. for ac work it pays to go to a pro that does ac for a profession especially with Mercedes. one thing done wrong could backfire to mega bucks..

Jan 31, 2014 | 2003 Mercedes-Benz CLK-Class

1 Answer

Repleace ac compresor for ml 320 99 year


evacuate the system,remove a/c lines from compressor,remove belt,then 3 bolts,2on the body of compressor and one on the back. thats simple.

Jun 27, 2012 | 2001 Mercedes-Benz M-Class

1 Answer

Why my ac/ heater it's not blowing not air at all but everything else seems to be ok on my 1997 e320 Mercedes Benz


your air conditioning unit has a gas cannister which eventually runs out. You will need to get this re-filled. Check ou yellow pages or on line for air conditioning services. Prices vary.

May 20, 2012 | Buick LeSabre Cars & Trucks

1 Answer

1987 mercedez air cond.not coming on ,plenty of freon compressor not comming on.


CHECK AC COMPRESSOR FUSE.IF POWER GOING AC COMPRESSOR CLUTCH COIL COULD BE BAD OR YOU COULD HAVE FAULTY COMPRESSOR CUT OFF SWITCH. IF AC COMPRESSOR IS A VERY OLD UNIT MORE LIKE AC COMPRESSOR BAD.

Sep 23, 2011 | 1987 Mercedes-Benz 300-Class

1 Answer

My car is Mercedes benz e 320 model 1997,suddenly the car while in parking switched off and the sign os ASR has appeared in the screen,i switched on again it works but when doing parking will switch off...


That is you're "air bag light" Take it to a licenced dealer to be fixed, all that means is in the event of an accident you're air bag(s) May not inflate.

May 20, 2011 | 1997 Mercedes-Benz E-Class

Not finding what you are looking for?
1994 Mercedes-Benz C-Class Logo

2,374 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

yadayada
yadayada

Level 3 Expert

76630 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...