According to “Motor Trend” magazine, the interior of your car can contain up to 10 times more pollutants and pollutants than air in an equal volume of space outside the car. Manufacturers have worked to overcome this in recent years with improvements to cabin air filters and air ducts. A common source of problems is the air conditioning system. The AC evaporator gets wet as moist air passes over its cool surface. This humid environment is a good place for mold and mildew to grow and for dust and pollen to collect and find their way back into the air system. Bacteria grow exceptionally well in this area, which becomes warm but still moist when you turn the car off. This contamination must be cleaned regularly.
Step 1: how to clean a car’s air conditioning evaporator
Inspect your vehicle’s air conditioning system under the hood. You are looking for the heater / evaporator box assembly. This is in the firewall that separates the engine compartment from the passenger area. It will be a plastic box sticking out of the firewall. The heater-blower motor will be connected to it. You are looking for the easiest way to access the evaporator core of your air conditioner.
Step 2: how to clean automotive air conditioning evaporator
Access the evaporator core. Many vehicles have a resistor block that mounts to the top or side of the heater box. You may be able to remove this for easier access. You may also consider removing the fan and seeing if you can access the evaporator core. If none of these methods work, you can drill a 3/8-inch hole between the evaporator box and the fan. This will be sealed later. You need a direct route to coat the evaporator core with cleaner.
Step 3: cleaning the air conditioner evaporator
Spray cleaner through access point into evaporator core. If you can see the core to cover it completely, that’s the best way. Many of these cleaners are foam-based, which manufacturers design to adhere to, clean, and sanitize all surfaces within the heater box. Fill the area with foam and let it sit for at least half an hour. The foam will turn liquid and will pass through the drain openings when you have completed your cleaning job.
Step 4: evaporator cleaning
Lightly rinse the area with water. You can use a light mist from a garden hose. Have a helper watch the interior vents while you do this because it can spray water inside the car. If you are not comfortable with the hose, use a spray bottle containing clean water to provide an additional rinse.
Seal the heater box. Install resistor block or fan if removed. If you made a hole, use RTV silicone from a tube to seal the opening. When you want to clean the evaporator again, simply pry out the dried silicone with a pick or screwdriver to access the core. Run your vehicle for half an hour with the heater on hot and the fan on its highest setting to dry the area completely.
Items you will need
- 3/8 bit
- Electric drill
- RTV silicone sealant
- Water hose
- Cleaning solution for AC evaporators
- clean evaporator air conditioning
- automotive air conditioning evaporator cleaning