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#1
04-09-2004, 01:56 PM
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can i replace the ac temp switch without evacuating system
on my 88 124 can i replace ac temp switch,on the reciever drier, with out removing freon. the car still has the green switch and want to put the red one on. this is to turn on aux. fan on at a lower temp? while doing a search a few weeks ago i read something about a 123 that said this could be done. sounded kind of odd as i would think the freon is right behind the switch. why else would there be a green o-ring on the switch.
do these switches leak internally? or does just the o-ring leak? i ask because i have a used one. the squeak you hear is me thinking of spending money. its kind of a dumb question,but hate to mess with the r-12 when it still works. thanks rich
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88 300E White, sold 9-04  88 190E Black 2.3 sold 90 300CE White, Grey sold 12-24-04  92 400E White,Grey Sold 5-06  90 300CE 91K Signal Red,Black Sold 2007 1989 300CE Smoke silver,Tan Sold 1-08 1993 300E 3.2 M104 motor  1991 300CE White,Grey  1994 E420 beautiful car,gone to new home 1994 E320 Smoke an Parchment.Beautiful car 
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#2
04-09-2004, 02:28 PM
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Aux fan switch on your drier to replace it you have to remove freon first on 123 model aux fan switch is switch on by temp not pressure of the freon. I will go for a new switch not a use one (R12 $$$)
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MB STARS Master Guild Technician,17 years MB tech 14 years independent shop owner
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#3
04-09-2004, 02:33 PM
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MB STARS, thank you very much. that explains the green o-ring on the switch
rich
__________________
88 300E White, sold 9-04 88 190E Black 2.3 sold 90 300CE White, Grey sold 12-24-04 92 400E White,Grey Sold 5-06 90 300CE 91K Signal Red,Black Sold 2007 1989 300CE Smoke silver,Tan Sold 1-08 1993 300E 3.2 M104 motor 1991 300CE White,Grey 1994 E420 beautiful car,gone to new home 1994 E320 Smoke an Parchment.Beautiful car
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