[TherealEddie]

I just bought this Suburban last week. My rear vents blow out cold air. It does have all the a/c parts going to the rear but the compresser was removed. I see nothing for heat going to the back. What am I missing?

 

[RayVoy]

You should have a heater core in the rear. It is just like the one in the front, it should have water hoses going to the engine compartment, a blower with speed controls, and a mode door to switch from ac to heat.

 

[TherealEddie]

I can see my a\c lines running under the passenger side of the body. I cannot see any heater hoses or anywhere they would attach back there. If i have ac i should also have heat as an option right? Any pics would be a nice start for me to go by.

 

[TherealEddie]

My rear fan works great but it blows cold air.

 

[RayVoy]

Ok, look at the controls for the rear heat, do you just have AC on the selectors?

Probably not, therefore, there should be a heater core.

When you can not switch between cold and hot, it is usually the blend door. This door moves the air flow thru the ac evap, or the heater core.

If the door does not move, the problem is usually an actuator (a stepper motor that moves the door), or a door that is jambed.

 

[TherealEddie]

I will remove my inside fender well tomorrow morning and see what all is there. I will let you know what I find then. Thank you for your help.

 

[RayVoy]

No, no, you should be able to get at it by removing the inner trim panel. The one the big air vent is in (at least, that was the way to reach it on my Envoy).

 

[TherealEddie]

Inside the vehicle on passenger side rear? That is what i am going to remove. I will post pics of what my plumbing looks like as well tomorrow.

 

[TherealEddie]

My Suburban was made without the rear heat option. It only has a/c.

 

[RayVoy]

Really, never heard of that option.

 

[TherealEddie]

Yep

 

[TherealEddie]

No heater core

 

[RayVoy]

No longer, it was there.

 

[TherealEddie]

Someone did one heck of a job patching the holes where the heater core outlets were. I am impressed.

 

[RayVoy]

Haha, ok. The pics I looked at seemed to have one line cut off and a hole where the other line would have been. But hey, I'm just looking at a picture, I'll go by your observation.

 

[TherealEddie]

Looks like a got a summer project to do now. I want heat back there for my passengers.

 

[missingremote]

Yea, Somebody took the heater out. I wouln't even drive it until summertime.