OMG! Another YJ heater thread!
Well my problem isn't like the others. ok here goes...
When the engine's warmed up and I turn the heater on full (or any speed for that matter) the left side of the duct is hot... while the right side is friggen cold. Its the same thing with the defroster, driver side vent is hot and the passenger side is cold.
I thought it was the blend door... but then it would all just be a neutral temp and not 2 completely different ones... and I'm out of ideas, so since I'm trying to avoid taking the whole system apart to find something I figured I'd try you guys out first