no heat

[coach_j]

hello everybody, i need some help before i go slap nuts....i have a 96 bonneville sse with no heater out put.. the control's seem to be working fine when i turn the heat up it moves up to the temp i want, just no heat from the heater box it self, its like its no getting the signal to open the box door to let the heat out, how can i check this out, and where do i start,,,,,,,any help would be grateful

the coach

[jdq]

First of all make sure all vacuum lines are in tact and not leaking under hood.My 90 sse hvac programmer just behind glove box,and there is a purple and black vacuum line there going to it. if you have this disconnect and check for air ,if there is, check the programmer itself,its where the 4 or 5 colored lines go into it.Inside this compartment are more vacuum lines make sure all are connected and not leaking.Above this you can see airmix actuator arm make sure you see movement when you go from heater to a/c with temp setting,it is possible this actuator arm could be stripped where it hooks into plastic clip and not moving flapper door

[richtazz]

Unlike your 1990 model jdq, coach_j's 96 uses an electric actuator to go from heat to cold. The control on the dash is basically a rheostat that varies the electrical signal to the actuator motor. There are two different motors depending on the cars options. It is not uncommon to get debris in the heater box that can jam the door and prevent it from moving.

[jdq]

Sorry Richtazz thought I could help for once instead of just asking for help myself,guess Ill leave it to you pros
LOL