Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 02-20-2002, 05:09 PM
Posts: n/a
Blower won't come on sometimes

I have a 1981 300D 120,000miles. The AC & heater work great. Sometimes though, the blower won't come on to move the air? It gets awful hot in south Texas. Any ideas????
Reply With Quote
Old 02-21-2002, 09:36 AM
renok7's Avatar
Registered User
Join Date: Nov 2001
Location: Montréal
Posts: 95
Have you had your blower regulator switch checked?

'93 300E 4Matic
'98 Nissan Altima
'00 Yamaha Road Star Silverado
Reply With Quote
Old 02-26-2002, 08:09 AM
84300DT's Avatar
Senior Member
Join Date: Jan 2002
Location: Mass.
Posts: 2,218
sometimes i cycle between ac compressor on and defrost and then 'eco' mode (with blower set to 'max' setting) to get it to work. will then usually work on all fan settings. don't know why but it does
1984 300D Turbo - 231k....totalled 11/30/07 RIP
Reply With Quote
Old 02-26-2002, 08:14 AM
Registered User
Join Date: Nov 2001
Location: North Central Kentucky
Posts: 1,061
Sounds crazy, but try this: Next time the blower won't come on, twist the ignition key switch just a bit to one side then the other. I have two MB with this problem in the switch. New switches are sitting in shop waiting for chance to install. Probably best to try this with the car parked as you may turn off the engine.
Reply With Quote
Old 02-27-2002, 01:48 AM
Registered User
Join Date: Dec 2001
Location: Chicago
Posts: 100
I had similar problems with the blower coming on whenever it felt like it.

The switch was the problem. Make sure you have voltage at both fuse terminals of the blower motor while the car is running and the blower is on the on position but not working, that can be an indication that the blower is not getting any juice in the acc. position.

Hope that helps.
1993 400SEL (W140) 281K
1999 S500 (W140) 163K (Sold)
2002 S500 (W220) 72K
1999 S500 (W140) 88K
You cannot simultaneously prevent and prepare for war.
Albert Einstein (1879 - 1955)
Reply With Quote
Old 02-28-2002, 06:11 AM
Posts: n/a
I too have also had this problem. I can confirm that it was caused by faulty ignition switch contacts. You do not need to change the whole ignition switch. You can simply replace the contact assembly at the rear of the ignition switch.
Our blower speeds are more reliable and seem to be slightly faster.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
1999 C43 - A/C Blower Question - Issue 99C43 Tech Help 3 10-06-2004 01:06 PM
4.5L blower motor resistor bypass switch erubin Tech Help 2 08-23-2003 02:39 PM
'97 E300D: Blower regulator purchase jessie_eaton Diesel Discussion 1 06-20-2003 10:19 PM
How can I get the heater blower on at all times? dieseldaddy Diesel Discussion 12 12-13-2002 12:42 PM
a/c blower problem Stephen Tech Help 1 05-26-1999 09:30 PM

All times are GMT -4. The time now is 04:47 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page