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High setting on HVAC not working 1990 300SE

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  #1  
Old 11-11-2004, 03:01 PM
cam69ss's Avatar
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Default High setting on HVAC not working 1990 300SE

Hello All,
I have a 1990 300SE with 236,000 miles and the high speed fan for AC and head does not work.
I took apart the HVAC controller and re-soldered all the joints. Still not working. Any ideas of what the problem could be?
Thanks in advance
Dan
 
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Old 11-11-2004, 09:30 PM
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Default RE: High setting on HVAC not working 1990 300SE

resistor is okay?

temperature switch is okay?
 
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Old 11-12-2004, 08:11 AM
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Default RE: High setting on HVAC not working 1990 300SE

sleepwalker,
I think the temp switch is OK as the automatic temp does work to control the heat or AC. I the resistor(s) was bad wouldn't I just have high speed and not low?
Thanks for your help
 
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