I have no heat or a/c blower works, and I have replaced several parts already

coolant MUST be FULL to have heat...check it when cold..heater hoses very-very hot? or,just keep throwing parts at it.

Do you have a service manual for the car? For diagnostic info , either that or on-line source like 'www.alldatadiy.com', may be very helpful! Sometimes , instead of going directly for what is wrong/broken, we need to be able to prove what IS working properly and by doing that , it will lead us to the 'faulty component' or cause of the symptom.