hi
the fan seems to run all speeds , but it runs slower when in the heat/ deff. modes ??

in any case it does not shift from heat to defrost mode ?
i have defrost most of the time unless i manualy flip the defrost door and then it locks it in place ? almost as if it has a badd diafram in the servo uniit ? tryed a hand heald mitty vac hand pump but can not get it to more than wiggle or hold vac unless i manualy move door all the way then it will hold a vac and stay open ??
going to try a direct vac line from intake to test it later today ?
also i dont seem to get any vac to the actuator that closes the large front door to force the heat to defrost ??
also the cool to heat lever only travels app 1/2 way in the slot , i might be able to get 3/4 by adj the cable some there ?
not sure if somone changed the control unit as i did see a non fact screw in one position ?
does any one know the correct pn for the control for the 74 dart / or have a pict ?
thank you !!!