If your air conditioner emits a bad odour, it can be an unpleasant experience. The smell could result from various reasons, such as mould and mildew growth, stagnant water, or debris buildup in the air ducts. Here are some tips to eliminate bad air conditioner odour:

Change Air Filters: Dirty air filters can harbour bacteria and other microorganisms, leading to bad odour in the air conditioner. Replace the air filters every three months or as recommended by the manufacturer.

Clean Air Ducts: Over time, dirt, dust, and debris can accumulate in the air ducts, leading to bad odour. Have a professional clean the air ducts to eliminate the odour and improve the air quality in your home.

Check Drain Lines: If the air conditioner has a clogged drain line, it can lead to stagnant water and mould growth, causing a bad odour. Check the drain line and clean it to prevent a bad smell.

Clean the Evaporator Coil: The evaporator coil removes heat and moisture from the air. Over time, the evaporator coil can accumulate dirt and debris, leading to mould and mildew growth, causing a bad odour. Have a professional clean the evaporator coil to eliminate the odour.

Use Anti-Microbial Treatments: Anti-microbial treatments can eliminate bacteria and other microorganisms which can cause bad odour in the air conditioner. You can use these treatments in the air filters, air ducts, and evaporator coil.

Check for Leaks: If leaks in the air ducts or condenser unit, it can lead to moisture buildup, causing mould, mildew growth, and bad odour. Have a professional inspect the air ducts and condenser unit for leaks and repair them as necessary.

In conclusion, bad odour in the air conditioner can result from various reasons, including mould and mildew growth, stagnant water, or debris buildup in the air ducts. Check the air filters, ducts, drain lines, evaporator coil, and condenser unit for any issues and clean or repair them as necessary. Use anti-microbial treatments to eliminate bacteria and other microorganisms. Finally, call a professional ac service center for diagnosis and repair if the odour persists.