You may need to get your freon recharged or your A/C compressor might be bad.
it wont blow heat itll blow cold air
Low refrigerant?
Check charge in lines-you can get a guage at most auto parts stores.
Temp blend door malfunction.
go to kmart and get a charge kit its like $10
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I have the same problem in a 1999 K2500 with the LT package. Any ideas?
my 94 explorer wont blow heat
by pressing ~
check you antifreze level if it is low you wont have eat or if you get lots of fog your heater core is bad
It starts cold
check the belts