Cadillac Forum - Enthusiast forums for Cadillac Owners - Holy Smoke!! 93 4.9 Heater/Defroster problem

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Holy Smoke!! 93 4.9 Heater/Defroster problem

I have a 1993 Eldo 4.9 (not N*) Leaking Anti freeze and what looks like OIL? into passenger side carpet under dash below glove box.
Started this AM and waited for it to warm up (192*-196*) Did not have A/C or Heater/Defroster on. After it was warmed up, Turned on A/C HI 60* and it cooled fine. After a while I toggled between 60*-90* using Blue-Red control panel buttons. Then HOLY SMOKE!! out of the floor vent, It was peeing out Anti-Freeze mixed with OIL? and the (Driver side ONLY ) windshield was all foged up, smoke was coming out of the defroster vents on top of the dash. Please help me if you can!!

RE: Holy Smoke!! 93 4.9 Heater/Defroster problem

Howdy Sounds like you have a clogged heater core.Had the same problem.