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#1
07-21-2003, 10:29 PM
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1987 300e A/c Push Button Problem
WELL DONE PEOPLE, PLS I HAVE 1987 300E ,RUNNING PERFECT A/C EVEN WORKS,PROBLEM IS RECENTLY,THE A/C WOULD COME ON BY ITSELT,WILL PUSH BUTTON TO 0 TO MAKE IT STOP BUT WILL IMMEDIATELY COME ON AGAIN ,THIS IS DRIVING MY WIFE NUTS, IAM THINKING IS IT POSSIBLE TO WIRE THE 0 BUTTON TO A SWITCH U KNOW LIKE IN OTHER SIMPLE CARS OR SHOULD I START LOOKING FOR 2ND MORTGAGE PLS HELP
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#2
07-21-2003, 11:16 PM
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No mortgage needed.
Let's say you need to replace. First, get pull the wood cover off and get the model number of the unit. Then check the junk-yards. I purchases a working replacement for $50+ship using www.car-parts.com. Since you are in Maryland, you will find at least a dozen there available for $125 or less.
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Willy '94 E420 White Mods ------- Berg Werks Keyless Entry Buzzer replaced with Chime Dash Light Upgrade Burlwood/Leather shift knob Alpine CDA-9815 Head Unit 2002/2003 16" C Class 7-Spoke Wheels Updated "Chip" to fix Code 19 problem
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#3
07-21-2003, 11:49 PM
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The buttons are sticky. On the 300TE, one of the POs children appearantly opened a 2-liter bottle of ginger ale in the car after dropping it -- there is sticky stuff everywhere and I can smell ginger ale when I remove the wood console trim.
One of the things that got sprayed is the pushbutton unit, and you have to hold the buttons down to get it to change modes -- the button for "normal" and "economy" both stick, so when you change to something else, you have to hold the other button down until those pop out. You can take it apart and spray some contact cleaner (the alcohol based ones ONLY, please, not carb cleaner, it will melt everything!) and see if that cures the problem. Otherwise, it's a replacement PBCU, new or used. Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#4
07-22-2003, 02:07 AM
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I took mine apart and fixed it. Has something to do with the temp setting wheel if I recall correctly. They can be fixed. Maybe do a search. I believe I did a post or two on how to repair the unit.
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Earl  1993 190E 2.3 2000 Toyota 4x4 Tundra
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#5
07-22-2003, 11:58 AM
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PUSH BUTTON
THANKS EVERY ONE FOR YOUR REPLIES, SOMETHING I HAVE TRIED IS STICKING IT IN POSITION USING TOOTH PICK AND IT STAYS OFF ,SO IA M THINKING IS THIS THE CASE OF WEAK SPRINGS INSIDE THE UNIT, CAN THE SORING BE REPLACED, CAN SOMEONE TELL ME HOW TO REPAIR THE UNIT ETC ,,THANKS
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#6
07-22-2003, 04:04 PM
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Solution to same problem
DO NOT SHOUT. It is rude and offensive.
Remove the CCU (Climate Control Unit), and resolder all button connections to circuit board. Do a search, all instructions have been posted many times. Good Luck, and post the success story.
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1999 Porsche 996 Carrera Convertible 1994 420E - SOLD 1986 300E - SOLD, what a car 609 Certified
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