Is there anyway to do the diagnose check for the heater control with an aftermarket radio installed. Or a way to get it to show the temp level its at.Bought the car it already had a preinstalled aftermaket metra kit.

 

Not that I know of... but if your having the problem where it won't change the temperature when you turn the **** - There is a 99% chance that it's the solder problem on the circuit board behind the ****.. mine has done it twice.. once before an aftermarket stereo (dealership replaced) and then one after (I took apart and resoldered)

It's actually a fairly simple fix.. and there are some REALLY good directions on the forum somewhere.. search around.. you'll find pictures and everything.. PM me if you need some help too..

Good Luck man.