Heater not working?

Most of the older vehicles were simple, Slide a lever and the cable moved the air door so air went through a soldered brass and copper heater core and a heater control valve opened to let hot coolant through the system.
Yours is not quite as bad as the high tech ones but it uses vacuum to move most of the doors. The blend door that controls the heat is electronic and buried under the dash behind the airbag module in the center of the dash.
To get to it you pull the negative battery cable. Next remove the console if it has one, then remove the floor duct. Next you remove the two braces and the air bag module.
Now if it has the rear seat heat duct you need to cut the duct and fold it back out of the way. Now remove the floor duct adapter and behind it you will find the actuator.
Replace that and work your way back out. Fold the heat duct back into place and use a large zip tie to hold it in place.

They are not giving how to test it just how to replace it, here are diagrams to help. Check out the diagrams (below). Please let us know what you find.

Nice! Good job on not having the remove the heater box, have not seen that done before. Let me know how it goes, thanks for the pictures. :)

It might be blend door actuator but because you have automatic temperature control you have to scan for codes to see what is causing it or not. A mechanic has to do it. You can try pulling fuse for sixty seconds with key on then reinstall it may reset it.

Okay, lets reset a bit. Do you have the auxiliary rear heater with independent controls or just heat ducts to the rear?

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.

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Cheers, Ken

Okay then the information I posted should be correct for the front heater. None of them make it real easy anymore. There are days I would love to play wack-a-mole with the guys who designed these things.

With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.

In the engine compartment is the only place you have access to those lines.