Ford: Heating & Air, blower motor resistor, diesel van

Question
Hi Ragu, Hope you can help me out!

I have a 2000 Ford 7.3 diesel van and the heating and air quit working. It started with only having high fan control and now I don't have any heat or air or fan blower. Any help would be appreciated.

Thanks
Jeff

Answer
you need 2 ck all fuses inside & outside with the key on then if all are good go to the blower motor and test the conector going to the motor you should have power there if you do then the blower motor needs to be replace.if not then the blower motor resistor could be the problem .test this with a test light you should have power when you change the blower speed switch if you do then the restor is bad if not then the switches are bad.    good luck