Heater will not blow hot air

HINSON

MEMBER
2002 DODGE RAM
V8
2WD
AUTOMATIC
117,000 MILES

Sometimes you can hear a door pop open then it will work but that's not a lot.

Tuesday, December 3rd, 2019 AT 2:20 PM

4 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

Yes, it sounds like you are having trouble with the blend door actuators.They are small electric motors that open/close a flap to direct air through the specific vents.Here is a tutorial showing how to replace:

https://www.2carpros.com/articles/replace-blend-door-motor

I've attached step-by-step instructions below for replacement and also their location.There is a driver and passenger side actuator.Hope this helps and thanks for using 2CarPros.

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Friday, April 23rd, 2021 AT 10:54 AM

HINSON

MEMBER
3 POSTS

There's not a clicking sound in the dash when the trucks running or I turn any of the controls. The actuators look like they turn like they are supposed to. How do you recalibrate the system?

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Friday, April 23rd, 2021 AT 10:54 AM

HINSON

MEMBER
3 POSTS

How to get air out of vacuum lines of heater by jacking up?

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Friday, April 23rd, 2021 AT 10:54 AM

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Yes, jacking the front or rear the the truck up and can force the air pocket out of the heater core. here are two guides to help:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

and

https://www.2carpros.com/articles/car-heater-not-working

Please run down these guides and report back.

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Friday, April 23rd, 2021 AT 10:54 AM