Hi,

I drove the car for about an hour to test what Arthur sugested. Today we have 95F ambient temperature. Driving the car without the ac was a real pain. This are my observations:

1. Driving on light traffic and moderate speed keeps the engine cool (85 to 90C) and that's the same with or without the AC running.

2. With the AC turned OFF y let the car idle (parked) for some minutes and the temperature climbed kind of fast up to 110. The high fans turned on and cooled the engine back to about 88. Driving really sloooooww uphill had the same effect.

3. Turned the AC ON, parked the car and let it idle for some time. The temperature climbed slowly up to about 95 and stayed there. The high fans didn't turn on. Same thing when driving slow uphill. The AC worked very good during this test.

4. Did test No.2 (no AC) again and got the same results.

BTW, before doing the test I had code 41 (CAN comunication...) on pin 8. I deleted the code. After driving the car for 1 hr and doing all test, I got no codes at all. What does CAN mean?

I think that's it. I guess Arthur is right about the viscous fan clutch. I'll drop a new fan clutch asap and see what happens.

Arthur, I couldn't find the articles you mentioned for the fans mod.

I'm still not sure about the AC dying after 3 to 4 hours of continous use. I guess I'll have to monitor that for some time with the new fan clutch and post back if it fails again. Same thing for code 41.

Thank you very much Arthur for you valuable help. This forum is great !

Juan

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Juan
1995 E320 Sedan
2008 Ford Escape
RC Helicopter