Skip the auto shop - Our mechanics make house calls

Q: Smell coming from ac

asked by on

Smell coming from ac when we turn it on

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

A: There is a few different smells that could ...

There is a few different smells that could come from the a/c. The evaporator may be leaking Freon, 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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Vehicle makes rattling noise when idling

Based upon the information provided, an inspection of the drive belt and air conditioning system should be performed. The squealing noise indicates your drive belt is under strain. If the belt breaks, you will not be able to drive your...

Q: How do I maintain the battery?

All batteries require some amount of maintenance, but if yours has vent caps, it requires a little bit more. Here’s what you need to know about both general battery maintenance and how to maintain a battery with caps. General Maintenance:...

Q: Possible hole in muffler

An exhaust system noise accompanied by a strange smell could be an indication of the catalyst deteriorating in the catalytic converter. The exhaust system should be thoroughly inspected, and depending on the mileage, if it is indeed the catalytic converter,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...