coolant

[jeepmedic46]

My Kj doesn't blow hot air when idling. Blows hot air while driving. Could this be a coolant problem? Vehicle is not overheating. Thank You

 

[roadkill]

coolants probably fine but the thernostat may be stuck open. does it run cooler than normal down the highway or while idling?

 

[jeepmedic46]

Temperature gauge reads the same on the highway and idling. Just blows cold air when idling and warm air when driving.

 

[1speed]

Sounds like a vacuum leak causing a duct to open or close incorrectly.