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Old 28 September 2009, 05:56 PM
jimmy101_again jimmy101_again is offline
Join Date: 29 December 2005
Location: Greenwood, IN
Posts: 6,912

Ya get what you pay for.

Propane can, and has been used as a refrigerant. I kind of doubt that an AC system designed for a particular type of Freon would work with "remarkably efficient cooling" when charged with propane. It might work but I doubt it would work very well.

It would certainly be possible to have a leak cause an explosion but even that isn't all that likely. The combustion limits for propane in air is about 3% to 9% by volume. More than 9% or less than 3% propane in air won't ignite no matter what you do to it. The air in the engine compartment is generally being constantly displaced by the engine's cooling fan (especially if it was warm enough to need the AC). So it would take an amazing convergence of factors to get a combustable mixture and an ignition source.
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