Carrier Furnace / AC Electrical Issues (Burning Plastic Smell)
Asked Jun 8, 2007, 04:35 PM
Any help would be greatly appreciated, as I am a bit of a novice in this area. I have a Carrier 58GS100-GA Furnace & Carrier 28RC130010 AC unit on top. Just today I noticed a strong acidic burning smell coming from the basement and loud humming sound, and noticed some minor smoke collecting in the basement. I quickly switched the thermostat to off, and master pwr off and proceeded to investigate... Pulled the maintenance cover and looked for burnt electrical lines but could not find any. So I decided to turn the thermostat back on and then set a temp (AC), went back down to the furnace and flipped the master pwr back on then depressed the furnace blower door safety switch back on and noticed a blue electrical flash *POP* just behind the box for the that switch. I repeated this a second time, and saw another flash came out from behind the blower where the lines came out of the switch box and went to the back lead behind the blower. I did notice the blower turns fine, both manually and after startup (continued to work until powered down, after the electrical flashes). I turned all power off again, and searched all the lines and could still find no burnt wiring. Any ideas? Thanks a lot!
Last edited by jrcon; Jun 8, 2007 at 06:13 PM.