[skbadive]

I have a 2000 wrangler and there is water coming out of the drain tube with the heater on. Do you think that the heater core is going bad.

 

[Jerry Bransford]

That's the condensation drain tube that will drip whenever the a/c compressor is running. And the heater turns on the a/c compressor whenever it's in one of its two Defrost settings. The a/c compressor is turned on then because it helps to defog the windows much faster.

 

[jherrington]

The man speaks the truth^^^