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post #1 of 5 Old 11-18-2009, 08:12 PM Thread Starter
 
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heater

I have a 94 Z,,,does anyone know why the heater doesnt blow hot air?
I tried to find a vacuum switch,,,but my big butt aint fitting under the dash!!!
lol!
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post #2 of 5 Old 11-27-2009, 09:01 PM
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Assuming the blower motor is working, and a full cooling system, you must have HOT coolant flow through the heater core. Feel both heater hoses, the temp should be hot and equal. If the hoses pass that test, you have a temp or sometimes called a blend door inside the HVAC module. On your car, the temp door is controled by a cable, between the HVAC control head and the temp door. With the car off and ignition in run, move the temp control back and forth, you should be able to hear the temp door slaming open and closed. If not, you will have to figure out why the door is not working correctly. it could be a control head or a cable problem, or a temp door problem. You will have to pull the control head out of the dash and check where the cable connects to the control head. If that is good, dissconnect the cable from the temp door and work the temp control back and forth and observe the cable for binding. If that is good, manualy move the temp door lever and see if you can hear the door slaming open and closed. If not, you have an internal problem and the HVAC module will most likely have to come out to be opened up and repaired. if you don't have equal temp on both heater hoses, look for a possable restriction in the heater core. A back flush might help. Good luck and PM me if you need more help.

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post #3 of 5 Old 11-28-2009, 10:30 AM
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WOW! Now that's what I call an answer

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post #4 of 5 Old 12-02-2009, 09:15 PM Thread Starter
 
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heat!

first of all,,,,thanks mlwheeler!!!
My wife has heat!!
the first thing i did was check the hoses,,,both were luke warm,not hot like the rest of the hoses.
duh,,,I shoulda thought o that first.
I started to pull the dash,,,then noticed the heater core might jus be able to slip out of there without doin it.
all i had to do was take out the glove box and PRESTO!heater core access!!!
sorry it took so long to post a thanks in here,,,,been pretty busy.
now all i need to do is replace the front suspension !!!
lol
thanks again!!
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post #5 of 5 Old 12-02-2009, 09:39 PM
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Your welcome. Glad I could help and the wife is happy. If momma ain't happy, no one is!!!!!!!!!!!!

Imperial Blue Metallic/2SS/M6
In My Hands: 12 November 2009

2004 Joe Gibbs Silverado
2000 Pontiac T/A (RIP) 1 November 2009
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