Mel, check if the heater core hoses are installed. Open the hood and look for the firewall. There you should see 2 hoses coming out of it. If these are cut then there is no way you can heat up the cockpit. The other thing would be check the motor that turns the baffle that controls the heat/cool air flow in your car. That is what I can think of since no heat is flowing in the car and everything else works fine then could be that no hot water is flowing to the heater core.