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Old 09-22-2002, 09:14 PM
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Join Date: May 2002
Location: USA
Posts: 1,114
94 e320 air conditioning not blowing cold air

Our 94 e320 ac system is not blowing cold air

Anything obvious to check for?

Is there a fuse in the fuse panel for the ac system?
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Old 09-22-2002, 10:31 PM
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Join Date: May 2002
Location: USA
Posts: 1,114
I am wondering if there is a correlation between having to replace a wiper assembly fuse and my current a/c problem.

Last week I had my windshield replaced, the shop reinstalled the mono wiper incorrectly, the assembly locked up on me and it blew a fuse. They said the removed the assembly and replaced a fuse. I am wondering if they messed with an a/c related fuse while they were in the fuse box. Is there an a/c related fuse? They did the wiper assembly work on Friday and delivered the car to me Friday evening to my home and I didn't drive the car until Sat. morning and noticed the a/c was not blowing cold air
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Old 09-23-2002, 07:30 AM
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To begin with, you need to find a new windshield shop. There is no need to remove the wiper to replace the windshield. They only need to use a thin piece of plastic between the windshield and the wiper unit to slide the windshield into place, sort of like using a shoe horn. Your shop obviously knows nothing about these cars.

Now, to the a/c. Is the compressor clutch turning and the fan motor blowing? If both of them are okay, then the problem is not a fuse.

With the engine running and the a/c on max cold and max fan speed, if the clutch is not engaging, the problem is a leak in the system which has lost refrigerant. If the clutch is turning, look at the sight glass on the filter drier just behind the drivers side headlight. It should be clear, if there are bubbles, then again there is a leak.

Good news is that your car is an original r134 system, so refrigerant is cheap. You can simply go to an auto a/c shop and have it recharged. If you want to do this yourself, you will need gauges at a minimum, and if you have to repair a leak you will need a vacuum pump. Also, this is a job that deserves lots of knowledge. If you don't know what you're doing you can cause personal injury or death.

Good luck,
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Old 09-24-2002, 04:03 PM
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Join Date: May 2002
Location: USA
Posts: 1,114
Update...just got the car back from the shop (Overby's)and here is what they stated

"dye was evident at the compressor, the expansion valve and the evaporator drains. customer to determine how long it takes for freon to leak out and advise. "

the service advisor said it may leak out in a couple days, a few eeks or even six months.

they used 1.5 lbs of 134a, they stated it has a 2.2 lbs system capacity.

they recommended a new evaporator at $2000 installed and a new compressor at $1400 installed both with 1 year warranty

thats a lot of green

any thoughts from anyone? recommend any in the Jacksonville, FL area for a second opinion?
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Old 09-24-2002, 04:37 PM
Gary Ganaway's Avatar
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Join Date: Dec 2001
Location: Cincinnati, Ohio
Posts: 367
I have same problem with my 95 E420. they found 3 leaks--expansion valve, a hose and evaporator. First, they recharged system to see how long it might take to deplete. Well, it didn;t take long about 3 weeks. So, what we did was go in and make "easier" fixes first. They replaced the hose, new expansion valve and new receiver/drier....bill was about $500...better than the $2000-2500 for also doing the evaporator. This was done about 5 weeks ago and air is still very cold. Although, in recent couple of weeks the weather has not been as hot, like 90's as it was.

I cross my fingers, this will take me through many more months as I do not want to face the dreaded evaporator fix. I would try the simpler fixes first to see what happens.

Of course now with cooler weather coming on I can do the 460 air conditioning...60 MPH with 4 windows open
95 E420 ( 76K) SOLD
85 380SE(125k)
95 SL500(72k)
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Old 09-24-2002, 05:21 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Overby's is a very old, reputable shop. They may be a little high, but they should be honest.

Another old independent MB specialist is Ash Tisdale's in Orange Park.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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