no heat?

[1988_supra]

hey sm got a 1990 supra 7mgte and it seems not to have heat but not only that when the climate control unit is at high it doesnt blow much at all out of the vents and when i change it to outside air coming it it doesnt blow at all what could be wrong any help is great thank you

 

[OldSkoolSupra]

Do a few simple checks. Some people take out t-stats, see if the heater control valve is hooked up backwards and check your vacuum lines. I believe the heater door is vacuum assisted.