2006 GX470 Heater problem. Cold air! (2 Viewers)

[Bors]

Started with a search, but not finding an answer to my specific issue. The GX has plenty of heat, but it only wants to come out of the vents above 2500/3000 rpm. As soon as I drop below that, it goes ice cold. Is this a door motor issue? A circuit board issue? Has anyone seen this before? Any direction would be appreciated.

 

[landwagon]

Check your antifreeze is topped off in the over flow.
That’s the first and easiest thing to check.

 

[SteveH]

Remove the radiator cap and check the radiator level before you bother with the overflow bottle.

Many GXs have bad radiator caps/neglected radiators because the cap is hidden under that idiot shroud. I drilled a large access hole in the shroud so I can easily get to the radiator cap.

 

[landwagon]

A couple years ago mine literally took a quart in the over flow and that’s all it took to make heat again. Plus it in plain sight.