What does the foggy smell from air conditioning mean
Home Improvement

What does the foggy smell from air conditioning mean?

Home Improvement

A foggy smell from air conditioning is not normal, and it’s something that you will want to get taken care of right away before it could cause problems. However, several different things can cause this, and some are more serious than others. The best thing to do is to have a professional air conditioning Dromana technician come out and look at your system so they can pinpoint the problem and then provide you with an estimate of the cost for repairs or replacement as needed.

The foggy smell from air conditioning

  • A foggy smell from air conditioning is usually a sign of something that needs attention.
    The foggy smell from air conditioning is usually caused by a build-up of moisture.
    The foggy smell from air conditioning can be caused by a leak.

There are several reasons for a foggy smell coming out of your air conditioning vents and it’s important to get to the bottom of the issue as soon as possible.

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The first thing you need to determine is whether or not your AC unit is actually the source of this unpleasant odour. If you notice that this foggy smell only appears when you turn on your air conditioner, then it’s likely a problem with your HVAC system.

If this is the case, four components, in particular, could be causing this issue:

The refrigerant used in modern AC units can sometimes leak out on its own due to wear and tear, but you may also experience problems if someone tries to tamper with it or add too much into it the system. This can cause damage throughout your home’s cooling mechanism that will leave behind an unpleasant odour when activated by turning on your HVAC system; therefore, it’s recommended to contact a professional service if any type of Freon-based leak occurs outside their recommended parameters set forth by manufacturers.

A few of the possible causes include the following:

  • Faulty evaporator coil
    Dirty air filter
    Dirty air conditioner drain
    Faulty compressor
    Faulty condenser
    Faulty expansion valve
    Faulty fan motor (the motor can cause a rattling sound when the blower is running)

If you find a foggy smell from your air conditioning system, it is most likely nothing to worry about. However, you should still investigate the source of this smell and make sure that everything is in good working order.

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This can be done by cleaning out your air conditioning unit with a solution of 10% bleach and 90% water. If this does not solve the problem then it may be something more serious and you will need to call an expert for help so they can diagnose exactly what is causing the issue with your unit.


To avoid costly repairs or damage to your heating and cooling system, you should have this problem fixed by a professional air conditioning Dromana contractor who can inspect your unit and determine the cause of the smell. This way, they can address any problems quickly before they become more serious. Foggy smells are usually caused by mould growth in ductwork home, so it’s time for an inspection- don’t ignore these warning signs!

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