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Old 08-12-2003, 12:22 AM
rrobben rrobben is offline
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Join Date: Jul 2003
Location: Louisville, KY
Posts: 41
new issues

JimF,

I did flush and refill with 60% distilled water, 40% MB coolant, and used the watter wetter. I'm still running over 100 when it's hot outside. I've also discovered that I have no heat in the car as well. I followed the tips on your site, and I get these codes from the A/C system:

Codes Meanings
E0 43 A/C system coolant temperature sensor (B10/8), open or short circuit **)
E0 74 Heater supply unit circulation pup (A31m1), open or short circuit *)
E0 75 Heater supply unit circulation pup (A31m1), open or short circuit **)
E0 83 Heater supply unit left duovalve (A31y1), open or short circuit **)
E0 87 Heater supply unit right duovalve (A31y2), open or short circuit **)
E0 99 Auxiliary fan, 1st activation, open or short circuit **)
E1 3 Auxiliary fan, 2nd stage activation, open or short circuit **)

Sounds like the heat thing is from a bad heater supply unit. But what do you think about 43,99, and E1 3? Could I have installed the cool harness backwards?
__________________
1993 500 SEL 121,000
2003 Toyota 4Runner 4X4 Limited (Sweet!)
1995 Ford Bronco 351 Windsor 135K miles (Hunting truck)

Past Vehicles
1999 Landrover Discovery II 46,000 (Sold)
1998 Lexus ES300 (Sold to get my Benz)
1973 Chevy Nova SS (drove it till the body fell apart in '87)
1971 Chevy Camaro (wrecked in high school)
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