Good morning!

Have a 2005 Ram 2500 with 127k miles. Been a solid truck. THAT being said, I'm in the process of getting a few of the things fixed up that have been popping up lately. Currently, the entire front end is getting replaced...ball joints, hubs, tie rod, drag link, steering stabilizer, etc. So THAT'S fun.

ANYHOO -- I have two issues within the cab:

1.) My "fan" setting switch only works on #1 and #4. I'm assuming the switch must be bad and needs replacing.

2.) I have heat coming out one side of the cab, and cold non-heated air coming out of the passenger side. Is there some switch or relay or something that moves a door in the system for heat? What would be giving me heat on one side and not the other? A stuck "door" in that duct system, or a door that isn't moving?

Input is much appreciated -- going to try and get another 15 years out of this truck and make it as nice and functional as possible!

Thanks in advance for the replies!

Cheers!

Mike

 

There is a resistor block for the blower motor, should be someplace relatively easy to see, just follow the wires back from the blower motor itself...... You can pull, and inspect it, and see if a couple resistors have failed.

Your truck have dual zone HVAC?

 

I would bet one or more of the doors are broken. Its very common.

 

Dodge has this issue with blend doors not operating properly. Do you have a rear heat vent? If so, you have 6 doors. If not, you have 5. When I changed my doors, I found that one door had the actuator pop out of the box, but it kept turning, therefore it made the long pin wrap around the actuator. Not uncommon. That one affected my floor heat. I replaced all doors with aluminum doors and aluminum door drives. I also took of the wiring harness and cleaned it, placed heat shrink around connection points, and rewrapped the harness with high grade black insulator tape. The original tape had unraveled and was not in contact with the wiring. The heat works the best it ever has since buying the truck new. It was definitely worth the time, effort and money I spent. If I had that done at the dealer, I was looking at $3500.00. Total cost for me was about $500.00.

To accomplish this job, the dashboard has to be removed and your AC reclaimed. And if you decide to do this, replace your heater core ($139 at dealer) and clean the fins on the AC core as well, cause they will all be right in front of you.

 

Did this heat on one side start all of a sudden or more slowly. If suddenly I would expect a blend door has broke. If more slowly I would consider flushing the heater core to see if that improves things. My truck used to have more heat on the driver side than the passenger side after flushing and back flushing the core improved it greatly.