Heater not working

I replaced water pump on my wife taurus all went well I thought, when I got done started the car and didn't seem to have good heat. Next day I put in a new thermostat and gasket It seems like the A/C is running all the time its dripping from the a/c discharge (water) underneath and the a/c hose's under hood get condinsation on them and there cold and thats when heat is on both fans are on and with winter coming I must fix it I don't know what I cold have done But it seems like in my other car when you call for heat and forget to turn the button for a/c off it gets luke warm then when you turn the button off it gets hot seems like a/c on all the time
Help thanks John sheridan