Heat blows cold on Drivers side, hot on passenger side

[JDogJunkMan]

I have 2 Ram 2500's for my business (1 2019, the other 2021), and both of them have the same problem. When the heater is on in the truck, the driver side blows cold air, the passenger side blows hot (lukewarm on the 2021... takes a while to get hot). They are both base model Tradesmen, with single zone Heat/AC. I heard that this is a common problem, so I am not terribly surprised to see if happen on my trucks... just not thrilled that it is happening to both trucks at the same time... and during a very cold period here in lovely Ohio. I have read a variety of possible solutions including flushing the heater core, flashing the computer, replacing actuators, and replacing water pump/thermostat/radiator... I understand that it is impossible to do a proper diagnosis via a forum, but I am looking for a little guidance from people who know these trucks well, and can make an educated response based on experience. I am not a mechanic, but I feel like I am reasonably well suited to troubleshooting problems if it isn't too complex requiring specific expert knowledge. Is this an expensive fix? Should it be done a dealership, or can any decent mechanic do the work reasonably well? Should I just consider trading them in for different trucks? Thanks in Advance!

 

[vincentw56]

I have 2 Ram 2500's for my business (1 2019, the other 2021), and both of them have the same problem. When the heater is on in the truck, the driver side blows cold air, the passenger side blows hot (lukewarm on the 2021... takes a while to get hot). They are both base model Tradesmen, with single zone Heat/AC. I heard that this is a common problem, so I am not terribly surprised to see if happen on my trucks... just not thrilled that it is happening to both trucks at the same time... and during a very cold period here in lovely Ohio. I have read a variety of possible solutions including flushing the heater core, flashing the computer, replacing actuators, and replacing water pump/thermostat/radiator... I understand that it is impossible to do a proper diagnosis via a forum, but I am looking for a little guidance from people who know these trucks well, and can make an educated response based on experience. I am not a mechanic, but I feel like I am reasonably well suited to troubleshooting problems if it isn't too complex requiring specific expert knowledge. Is this an expensive fix? Should it be done a dealership, or can any decent mechanic do the work reasonably well? Should I just consider trading them in for different trucks? Thanks in Advance!

You might have better luck in the Homepage - HD Rams forum. This is the 5th Gen 1500 Rams site.

 

[JDogJunkMan]

You might have better luck in the Homepage - HD Rams forum. This is the 5th Gen 1500 Rams site.

Thank you!