In simple terms, chemical wash is the process of cleaning the internal components of an air conditioner with chemicals.
The process involves dismantling the internal parts, including the evaporator coils, filters, and condenser, and immersing those in a chemical solution. This helps to remove any sticky dirt particles and corrosive acids from the internal parts. The technicians may also flush the internal drainage pipes with the chemical solution.
Chemical extraction and washing is necessary for aircons to continue working optimally and to ensure that they remain functional for a long lifespan.