Heat Doesn't Work, but A/C Does

[Dart_Dodgers]

Hi everyone, I have been trying to figure out what is wrong with my Dart, and don't have too much experience with the heat and a/c. The problem is that any of the heat selections on my control panel don't blow air whatsoever, and yet the a/c selections still blow air just fine. Anyone have any ideas?

 

[pishta]

so no fan under heat settings?

 

[Dart_Dodgers]

Exactly. But I have a fan just fine on the A/C settings

 

[clhyer]

What year?

 

[cudamark]

The pushbutton control unit probably failed.

 

[Dart_Dodgers]

The pushbutton control unit probably failed.

It's a slide selector type setup

What year?

It's a 73

 

[67Dart273]

Another guy who needs a shop manual. Best we can do is 72:

http://www.forabodiesonly.com/mopar/showthread.php?t=132309&highlight=manual,+download

 

[cudamark]

It's a slide selector type setup


It's a 73

Ok, then the slide control probably failed.

 

[BillGrissom]

That is good. The pneumo-electric push-buttons are very expensive to replace. I haven't seen a slide type factory AC one, but they must be simpler and easier to fix.

 

[cudamark]

I've never had a '73-up unit apart so I don't know if it's easier to fix or not. Unless it's a minor problem, I don't know if there are any repair parts for it as it's all riveted together and was only sold as an assembly. The only ones I ever remember selling was because one or more of the vacuum nipples were broken off. I never had one of that type fail internally or electrically. I guess it's just a matter of time with all these parts. I'd check the resistance in the heater motor or you may have the same problem soon. Those motors draw a lot of current and melt fan switches and heater controls in other models.