I have a 2021 ram bighorn 2500 it has the 8.4 unconnect with manual climate control knobs. There's no climate control sittings on the unconnect. It's 3 Manuel knobs under the screen with no buttons in between. Heat blows hot outa passenger side but not out the drivers side and feel like no defrost. It does it in every mode. Floor, mix, dash vents, defrost/floor. Fan speed seems to work. I don't see any modules like mine anywhere on line. It's no climate control through the unconnect. And only 3 manual knobs under the screen. Most manual systems I see online have buttons in between the knobs. Any suggestions
Ram Heavy Duty Forum
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Heat blows hot on passengers side not drivers side
- Thread starter jw2021
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Gear box
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Our 2019 at work did this -3500 cab/chassis at 45,000 miles. I disconnected heater core and made a tool to back flush the heater core, then I used CLR and let it soak. Then flushed it several more times. This worked great until 110,000 miles in which we had to remove and replace a leaking core. It was full of a sandy grit when flushed -coolant was replaced at that time. These small/thin passageways on heaters/coolers are problematic.
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