I have a 95 V8. my Heat does not work (i have semi-automatic climate control). Ive replacd the whole control box, thinking the problem lied in the switch. the screen on itwouldnt light up and the heater still didnt work. so i replaced the blower motor but it still wont work. Ive replaced the fuses and checked to make sure all wires were connected but the heat doesnt work (the box is not functioning and the blower does not come on)

can someone help me with this.

whats shouldI do? what should I look for?

 

Some heaters use a vacuum operatedshuit-off valvein-line with the heater hose (to cut off the heat to the cabin for better A/C operation). Check first for vacuum (pull off the vac. hose with the car running and check for suction)and then for a broken or rotted valve (pinch off heater hoses on both sides ofvalve and undo clamps then remove and examine valve).