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Q: Smell coming from my AC

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Smell coming from ac when we turn it on

My car has 175508 miles.
My car has an automatic transmission.

There is a few different smells that could come from the a/c. The evaporator may be leaking refrigerant, heater core leaking engine coolant. Both of these leaks you will notice the a/c will not blow cold for the condenser or the coolant of the engine will be low and a leak under the vehicle of coolant if it is the heater core. The last problem is a mold and mildew build up inside the a/c evaporator from build up of debris and standing water. This is the most common of the problems and you may need to have the system treated with an Ozone machine that will kill all the mold and mildew. This will only be a temporary fix and it will come back when the system gets a build up of the mold and mildew again. You may need to replace the evaporator if it is clogged or the smell cannot be stopped.

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