Less heat on driver side

[kjg26]

Out of the blue I began having less heat on the driver side than the passenger side. At idle and with the blower on low I have out 125 degrees to the pass side vents and 110 to the driver. At high blower speed the driver side drops to 90s. I've checked the blend doors and the 3 actuators in the cab side of the heater box and they are all fine.

I'm trying to determine what my next step is . Do I need to go ahead and pull the dash and replace the heater core? Back flush the heater core?


It's been suggested that the core could be partially blocked internally. It's also been suggested that the condenser could be so caked up that there isnt enough air flow.


Please.... any help is greatly appreciated.

 

[R.Taylor]

A vehicle description in your sig line would help....

 

[kjg26]

My apologies. 16 ram 2500 6.7 Laramie auto 4x4. 140k highway miles. Little towin .

 

[Ram4Sam]

My apologies. 16 ram 2500 6.7 Laramie auto 4x4. 140k highway miles. Little towin .

Since you have a Laramie with dual temp controls.....I had this issue a while back.....embarrassingly, I didn't notice but the dog had bumped the pass side temp knob and the temps for the driver and pass sides were at different temp settings......

Sam

 

[kjg26]

Wish it was that simple.

 

[Ram4Sam]

Wish it was that simple.

Bummer....best of luck....

Sam

 

[kjg26]

For those of you following this. I back flushed the heater core with hose water. Didnt use any chemicals. Hooked everything back up and I'm sweating now. Pass sude is up to 149 and driver side is 140 with ambient temp of 50. That's on the dash. MUCH MUCH BETTER. Guess either some blockage in the core that I couldn't appreciate during the flush or maybe air pocket ?

 

[EDankievitch]

Glad to hear you got lucky with an easy fix. My wife’s Honda CRV has the same issue we’ve one th back flush route with no success only option now it replace the core. I think we just might trade it in first let someone else deal with it...

 

[Ozymandias]

For those of you following this. I back flushed the heater core with hose water. Didnt use any chemicals. Hooked everything back up and I'm sweating now. Pass sude is up to 149 and driver side is 140 with ambient temp of 50. That's on the dash. MUCH MUCH BETTER. Guess either some blockage in the core that I couldn't appreciate during the flush or maybe air pocket ?

Maybe a calibration of the blend doors would help.