yes, both fans come on in low speed. i sat for a while and they also came on in high speed when the temp increased.

<>

You kidding ??

I had to stop that stuff years ago.

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A Dalton

OK

Do you mean they came on by themself or do you mean they came on when you did the jumper test I told you to do.... ???????????????????????????????????????????????????????????????????????????????????????????????????? ?????????

Do you see why that info is critical to diagnosis?

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A Dalton

they came on by themselves. earlier you asked if they came on in low speed when the a/c was on and i didnt think they did, but they do. so i did not do a jumper test bec they were already on in low speed when the a/c was on.

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Ok..you do see why your post could have been read either way..which would really change the direction .

So , next question is did they convert the car to 134A when you had all that ac work done?

Ismalley,
I live in the Palm Springs area also. I have 2 cars, a '93 300CE and a '95 E420
When it gets over 105 they both start losing their cooling capacity. While the AC works, I don't think the earlier cars were designed for these extreme temps. Benz only had experience in Africa and the tropics. It is rare to find temps over 105 in these locales. Here for the rest of the month we will be looking at 109 minimum to 115.
Anziani

True..
It is in the design..but we have a few" cheap tricks" [ not da' Band..] ..
that help....

This will pertain to both of your chassis, Anz.

One, is you can bridge the CTS to cut the high fan on at a lower temp than the stock 105/107C
That cost one Dollar... a simple cut-in drop to 100 makes a big difference.

..and you also can run a relay to up the a/c low fan to high speed for a/c operation. $10......
Both of these are short$$, easy to do, and will both up the capacity of the a/c and keep the coolant temps in check on those badddd hot days.
You can also change coolant ratio to a more applicable 60/40 [ h2o/af], and change the theromstat to a tropical rated one [ lower opening spec temp]

.
Airflow and coolant temps are BIG factors on a/c output ............and easily addressed.

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A Dalton

Yes my car was converted to the r134A. I am willing to try anything as long as it works in cooling down my car....without messing anything up, as I have already had a lot of work done that cost me several thousand over a short period of time.

< Join Date: Oct 2006
Location: California
Posts: 57


Yes my car was converted to the r134A.
>

Those systems were marginal with R12 , so conv to 134 is not going to cut it.

I would do those few mods I mentioned to help, but don't expect much from 134 .

At what temp did the high fans come ON??

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A Dalton

Around 110° to 115°.

Ok


That's high. so I would definately do the resistor mod on that sensor.

Just do this test , as WRITTEN:

Get the car up to normal temp and then unplug the 2 wire blu sensor at the thermo housing area..that will get you a HIGH fan by default before being triggered by the sensor at 107C.
Now take the car for a ride and see how the ac/ performs with that manually added air-flow.

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A Dalton

Ok, is that the two pigtail wires we were discussing yesterday?

No...
I knew you were going to do that.

Re-Read it, Man..
It says :

BLUE 2 WIRE SENSOR at the thermo housing area...

Let me get the parts pic....

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A Dalton

Sorry, but I don't even know where the thermo housing is or the wire sensor for that matter.....but ask me anything pertaining to medicine and you'll be surprised

Good...What kind of medicine do I take when I have to deal with post like this one???


http://catalog.peachparts.com/ShopByVehicle.epc?q=1990-Mercedes--Benz-190e--.6-Climate--Control&yearid=1990%40%401990&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6134%3AMBC%7C1486%3AED%7C10000011%3ASM%7C847%40%40190E+2%2E6&catid=242213%40%40Climate+Control&subcatid=242256@@A%2FC+ACC+Temp+Sensor&mode=PA

Now, put your glasses On, open the hood , and look for this part..it will bite you if you get too close.

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A Dalton