AC/Heat problem Thanks for the quick response. I am going to ask the guys at Autozone as you suggested, but I have a couple other questions...is this eletronic sensor you mentioned under the hood or in the dashboard? Also, could you recall what it was called? I've read some of the other blogs and folks have mentioned a resistor pack. Is this what you are referring to?

Try your local auto parts store and as one of the guys if he can take a quick look ay your car and give you an idea what could be done.
autozone or advance auto parts Orghlies https://www.oreillyauto.com/locations


Advance Auto Parts Down for Maintenance

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=24&cad=rja&uact=8&ved=0ahUKEwjN96-n6ZXVAhWC7iYKHbTYD1gQ-TAI5wEoADAX&url=http%3A%2F%2Fwww.autozone.com%2F&usg=AFQjCNEspYMpkE-toymgM6M8llWwey_qUQ

-I do not answer you question but give you some suggestion before replace it.
-Why need to replace..?
-No heat ? Not the heater core
-Leak from the core...? Do pressure check for sure before replace.
-Most heater core last for the life of the car. Unless it's very corrosion and broken.

Good luck better fix quickly otherwise will drive with out heat.

Thanks

Mai

Complain first in writing to the contractor. If not satisfied with response advise that you will complain to Better Business Bureau and sue in Small Claims court. Be aware that it is critical that you have a contract that specified what you were quoted. Use an app to record all phone calls with contractor. I have used the following with Android (records incoming and outgoing calls)
How To Record Phone Calls On Android to Keep Your Conversations Not familiar enough to advise on IPhone app.

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

The ac works from electricity and the heater may be vacuum controlled by the same circuit so check for fuses problem

Possible vents, heating system

i have checked with a friend in Kenya and if you need to, you can make up an adjusting bracket for the alternator(for belt adjustment)
and remove the ac.NO PROBLEM.as when they go wrong they also take them off, when fitted. hey guys,this is a world market,its not just the good old U.S.A.that has electricity.......mind you,only 2/3rds does.....

just a guess but being that the rear defrost is not woking id bet ist a fuse check owners manuel or go to a local autozone or the like store as thy should check this for free hope this is helpfull.
please post response good luck

Your heater core will need to be replaced. It is hard to get to but is possible. Have done a few of them. You can go to autozone.com and register for full free online repair manual or google ebook chilton's manual and feel free to ask any questions

Look under your hood, not under the dash. It'll be against the firewall. Short tube pointing down.