Odour is a normal feature of automobile air conditioners. But, the odor’s pungency can be reduced greatly by identifying the working on the source. An undesirable odor coming from the dash air vents is in most cases caused by mice or other small insects living in the air box. To eliminate this, removal of the nest from the inside of the duct or blower motor area is recommended.it is possible too that this can be caused by mold and or bacteria growing on or around the air conditioner’s evaporator unit or core.
Follow this steps
Step 1: DISCONNECT THE EVAPORATOR DRAIN TUBE
The most common factor of mod and bacteria growth within the air box is a blocked evaporator drain tube or hose. The drain tube steadily drips water when the air conditioner is in use, and
Most especially when it’s humid outside. If this drain channel is blocked with leaves or other materials, the evaporator’s condensation won’t flush out causing the water to stagnate. Locate the drain tube by checking under the passenger side of the car near the bottom of the firewall unit. Use a metal coat hanger work to gently push through the blockade.
- Since water and debris can rush out of the drain hose soon as is unclogged. Use of safety glasses are recommended for this under-car operation.
- The evaporator core can be spoils or damaged very easily when pushing the coat hanger very far. Be careful not allow the hanger to move past the drain tube.
Step 2: SANITIZE THE EVAPORATOR CORE
If the odor persist after unclogging the drain tube, then there would be need to use an anti-odor kit. Several products are made for this. Purchased a product with a spray can with a long hose to pass through the vents and kill the mold and bacteria. This method is the easiest but less effective method. Some other product may require access to the evaporator core either through removing the blower motor, removing the blower resistor or by boring a hole in the duct near the evaporator. Be sure to follow the instructions on the kit as some products use a chemical cleaner sprayed directly onto the evaporator and allowed to dry. Then use another chemical to stop further mold and bacterial growth.
Step 3: CABIN FILTER REPLACEMENT
Most cars use a cabin air filter to clean the incoming air. These filters as a matter of need should be replaced every year or every 10,000 to 15,000 miles. Refer to the cars manual for proper specification. The use of a charcoal impregnated cabin filter can be employed to help the stop of odors. Cabin filter can be found from under the hood close to the firewall, under the car windshield or from behind the glove box for some cars. It is within the air box housing.