no hot air

'94 Camaro z28 6spd with hypertech performance program, K&N air cleaner won't blow hot air. The AC seems to work fine. Fan works, just won't blow anything but "room temperature " air thru deforster or vents when fully warmed up. Where to look first?

i also have a 6 speed manual 1994 lt1 z28 and mine would not blow hot air neither. But my car also overheats when I'm stopped and the heater is off. So if I'm driving everything is fine but when I stop it overheats. I dont know what the problem is???????? I replaced the coolant sensor and thermostat but they did not help.

I also have a 1994 6 Speed Z28 and had that same problem. I then found out the heater core wasnt connected....apparantly the previous owner was retarded.

I doubt thats your problem, so I suggest thermostat, water pump and before all that try a good flushing.

i would guess either the water pump or the heater core is your problem

i would guess either the water pump or the heater core is your problem
I agree with Cbball guy, heater core.