1990 lesabre heater problems emergency brake light

I own a 1990 Buick Lesabre and having trouble with my heater. When I put the heater on the heater setting it doesn't work, but when I put it on the bi level setting I can feel the heater vents barley getting warm but no air comes out also my emergencey brake light comes on when I am driving but won't work at all when I use the emergency brake. Any help would be greatly appreciated.

Heater problem: Check for heat coming out the defroster vents. I suspect you are getting heat there, but not out the front vents. If so, the problem is with a vacuum hose. Your heater's vent system runs on engine vacuum to switch between vent, heater, and defrost settings. It is located at a spot under the master cylinder and to the left. Usually the hose dry rots off.

Emergency Brake: The switch is at the end of the foot pedal. It sounds like it is defective, but could be just out of adjustments.

Heater problem: Check for heat coming out the defroster vents. I suspect you are getting heat there, but not out the front vents. If so, the problem is with a vacuum hose. Your heater's vent system runs on engine vacuum to switch between vent, heater, and defrost settings. It is located at a spot under the master cylinder and to the left. Usually the hose dry rots off.

Emergency Brake: The switch is at the end of the foot pedal. It sounds like it is defective, but could be just out of adjustments.


Thanks alot for the help it is greatly appreciated