[quantass]

I have a 1991 Mercedes 190E 2.3. When i go to turn on the heater within the car there is no blowing action. I've tried pressing all the buttons and nothing. I recall the heater acting up some time back; sometimes it will come on and sometimes it wont. There is no noise whatsoever. After several minutes i can feel heat slowing wading out but no blowing action.

I've checked all the fuses and they seem fine (at the very least there is a sliver of silver on the odd looking fuse). If i had a decent Mercedes manual i would check it for such a problem but alas i only have that crappy photocopied one making its rounds.

Thanks for any tips on getting my heater working.

 

[Stravlr]

The usual suspects: Fan switch or Blower Motor. If you give the blower motor 12V directly at the motor (or @ the end of the relay) and it works you've got a bad switch (or relay).

 

[quantass]

Where do i locate fan switch or blower motor? I can take a photo under the hood but from there I'm lost as to where to look.

thanks

 

[aardvark]

There are multiple threads on blower motors.
It's in a housing under the wiper assy.
Fan switch, I'm not sure...
Anyone?

aardvark

 

[Stravlr]

It's on the dash. Its the "thing" you use to change the speeds of the fan..

 

[quantass]

Just more info. When i adjust the fan speed switch nothing happens. When i select the blow type switch i can hear a clicking sound coming from the squirrel cage. There is no blowing though. On every selection i can hear a motor from the engine running:



The highlighted red area is the running motor when i have the switch control selected on any item accept (0). I checked the 25a fuse for the blower motor and it is fine.

I will proceed with taking apart the bulkhead, wiper, etc to get access to the blower motor and will test it with a 12v charge. I dont have any spare fan switch to test in place of my existing one so if the motor works then i wll proceed with purchasing a new switch.