heater controll only works on defrost . when i put the controll on floor i get nothing? any ideas?!

 

sounds likethe mode door actuator is inop.its a little motor that moves defrost or heat mode door when it is selected.moe

 

thanks moe
would this be a hard fix and or is ther a fuse i should check first?

 

its not that easy.back in the day there was a problem with a vac line that went thru the fire wall to your ac/heater box.not sure if your newer car still uses this method .wouldn't hurt to look under hood for broken vac line .pretty sure you don't have this set up.moe i'll look for picture of what your dealing with inder your dash. (mode door)

 

 

1 - BLEND DOOR ACTUATOR

2 - MODE DOOR ACTUATOR

3 - HVAC WIRE HARNESS

 

So they're motors now? Hmm! So that's why it doesn't change when going up a steep hill or stop the engine. My older ones always defaulted to defrost when loosing manifold vacuum.

 

been motors for a long time now. Some systems have been vac plus motors but most everything now is motors.

 

this is one tuff job.and costly.moe

 

moe, thanks for your help. heater is now working.sorry it took so long to thank you but there was serious illness in family.