Cadillac Repair: Cadillac Heater, vacuum lines, dash vents

Question
Hi, recently my 95 Deville has had a heater issue. One day it works, next day it doesn't. Sometimes you hold down the defrost button and it turns on ( I think it's a fluke) sometimes it doesn't. I had the ac/heater programmer installed this time last year and a blower motor at the same time. Any ideas what to fix? Thanks

Answer
Your referring to the fact that you are NOT getting any hot air from the defroster vents for the front windshield, YES ?.

Your problem is either a fault in the :

Programmer, Vacuum lines or the defroster actuator.

Do you get normal air to your feet and normal A/C from the center dash vents ?.

What you will need is several pictures and simple test directives to diagnose the fault along with help.

Please e-mail: onlineautohelp@msn.com