5th Gen Ram 3500 Dually Driver no heat

[Javagu]

Hello all. I can’t seem to find much info on my 2021 Dodge Ram 3500 (Dually). I need to know how to replace the blend door actuator for the driver side. Passenger side heat is good. Cold air is good on both sides. No heat is the issue. Floor no heat either. Any help is greatly appreciated. Ps. I removed the glove box to see if there was an actuator but no actuator is visible behind the glove box. Help!!!

 

[crash68]

I need to know how to replace the blend door actuator for the driver side.

Does the truck have the dual zone automatic climate control? (there will be temperature settings for the passenger and driver)
If it doesn't have the dual zone ATC, there is only one blend door for temperature and you most likely have a plugged heater core. There's many threads on this forum about it, some have been lucky to back flush the heater core but the ultimate fix is replacement.

 

[Javagu]

I don't have the dual zone equipped on my truck but I did flush the heater core once and it was fairly clean. I would really like to tackle the replacement of the actuator but I have found nothing on how to perform the replacement for this 5th gen. 3500

 

[GTyankee]

For one thing you may as well call the 3500 Ram a Generation 4 Ram

Every HVAC System has at least 4 Actuators
Most ProMaster Vans have 5 actuators

The first one is above the upper glove box, it moves the Recirculation Door

The second actuator moves the Blend Door, it is just to the left of the Blower Motor

The third & forth Actuators are behind & slightly below the HVAC Controls, These Doors are called the Mode Doors, #1 & #2
they direct the air flow to the Defrost & Floor settings.
The other door controls the air flow to the Dash Center Vents

Some day, some one that disassembles & reassembles the complete HVAC UNIT,
will think about how the Driver vs. Passenger air flow is controlled & make a Youtube video about it

 

[nlambert182]

I don't have the dual zone equipped on my truck but I did flush the heater core once and it was fairly clean. I would really like to tackle the replacement of the actuator but I have found nothing on how to perform the replacement for this 5th gen. 3500

Just because you didn't see gunk come out of the core doesn't mean it isn't clogged. Flushing is a 50/50 chance. That sounds much more likely than a bad actuator. If the actuators are moving when you tell them to, the likelihood of them being bad is slim. First symptom of a clogged core is no heat on the driverside.

 

[jawzs2]

Some day, some one that disassembles & reassembles the complete HVAC UNIT,
will think about how the Driver vs. Passenger air flow is controlled & make a Youtube video about it

Found this when I did the core in my 2010 years ago, there's a baffle running down the center of the plenum that splits the drivers\pass side air flow.

 

[Burla]

Found this when I did the core in my 2010 years ago, there's a baffle running down the center of the plenum that splits the drivers\pass side air flow.


View attachment 561163

nice

Guys need to consider RMI 25, it takes any contamination and deposits it harmless into over flow tank.

The OP has a Cummins, it is possible it is much worse then an air issue. EGR cooler can be a culprit here, and this small issue can not only show a the beginnings of a clogged HC, but also a clogged EGR cooler that was the original cause of the heater core getting clogged in the first place.

Don't shoot the messenger...

.

 

[Wild one]

There's a pile of video's on youtube about replacing the heater core and blend doors / actuators if you go looking

2016 Ram Pickup No Heat On Driver's Side. You Won't Believe The Cause!!!

Here I bring you along with troubleshooting this 2016 Ram 2500 pickup that has barely any heat coming from the driver's side. Disclaimer: This video is inte...

www.youtube.com

4th Gen Dodge Ram Aluminum Blend Door Upgrade From Blend Door USA | Complete Installation

Here I will be showing the complete installation of the all-aluminum blend doors from Blend Door USA in this 4th Gen Dodge Ram. I know I said I would include...

www.youtube.com

Ram 1500 2009 -2018 blend door acturator replacement call 8326187291 Houston Texas

Only by appointments call 8326187291 north Houston auto repair call for more information we do almos all types of repairs fuel pumps fuel injectors and more

www.youtube.com

How to Replace Blend Door Actuator 2011-2018 RAM 2500

Shop TRQ on 1AAuto.comHVAC Blend Door Actuator https://trq.video/ia-1AHCI00019Shop TRQ on eBayHVAC Blend Door Actuator https://www.ebay.com/itm/315014473976?...

www.youtube.com

Ram Dual Zone Mega Cab HVAC Rebuild

3rd Generation 2002-2008 Dodge Ram Mega Cab Dual Zone Climate Control System rebuild with aluminum Blend Door USA doors. www.CarboniteCummins.comwww.BlendDoo...

www.youtube.com

Blend Doors and Evaporator Replacement - Part 2, Rebuild

Part 2 (Rebuild) of a 3 part series detailing the process to properly rebuild the HVAC system of a 3rd generation (2003-2009) Dodge Ram with a new evaporator...

www.youtube.com

 

[Wild one]

This video shows him cutting apart a heater core,and is definitely worth watching.

Cutting apart a heater core to see why the customer had no heat! 2017 Ram 6.7 Cummins

Today we cut apart a heater core out of a 2017 Ram 2500 6.7 cummins to see why after we flushed it twice we still couldn't get any heat from the heater core....

www.youtube.com