Belmont Auto Repair

Your vehicle’s air conditioning should cool the cabin without any odd smells. But if you notice a musty, sour, or slightly sweet odor every time you turn it on, there’s a good chance something is happening inside your HVAC system. This type of smell affects your comfort, and it’s a warning sign that moisture, mold, or bacteria are present in hard-to-reach places under the dash. In most cases, the source of the odor is either the evaporator coil or the blower motor. These components are both essential to your A/C system and can collect moisture and debris if they aren’t serviced regularly. What Happens Inside the Evaporator Housing The evaporator is the part of your air conditioning system responsible for absorbing heat from the cabin air. When warm air flows over it, the coil cools the air while causing moisture in the air to condense. That mo ... read more