1994 Ford Ranger Pick-up Smelling - Heating & Cooling System


Question: It recently turned cold enough to run the defroster and heater in my 1994 Ford Ranger P/U. Soon, after running the heating system for the first time, I noticed a really bad smell. At first, I thought that the radiator was overheating, but the guage read fine and the water level was OK. Perhaps a week later the smell got worse, but the gauge continued to read fine and the water level was OK. Then I noticed that the defroster was no longer clearing the frost on the windshield. And I couldn't clean the glass because there was a thin film on the windwhield. Then, I noticed what appeared to be "smoke" coming from the heater/AC vents. I looked under the hood, but didn't see anything out of the ordinary. The smell and "smoke" got worse over the next several days. The smell was horrible - just like an overheating radiator - only much worse. I decided to see what would happen if I turned everything off - heater, defroster, fan, vents, etc. When I did that, the "smoke" BILLOWED out of the vents!!! I'm in the south and we can use the heater and AC in the same day...It still stinks when I run the AC, but there is only a tiny bit of smoke....What could be wrong with my truck and am I killing myself by driving it?

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Technican: From the sound of your symptoms you have a bad heater core it could have a very small leak just enough to give off steam and if it goes long er you will notice a difference in your radiator levels I hope this helps

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