95 Eagle Vision

I have a 95 eagle vision. My a/c works but my heater does not. It just blows out cold air when I try to turn the heater on. Someone told me I might need my heater control changed and they said they know hot water is getting to the heater core. So im not sure what im suppose to get....
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Answers
Can you do this test---from the engine bay, feel the hoses that enter and exit the heater core (the heater hoses)--are they both warm or just the entry hose?