What is a chemical wash (coil clean)?

A chemical wash targets the evaporator and condenser coils in an air conditioning system, applying specialised cleaning solutions to dissolve stubborn mould, scale, and grime that accumulate over time. These coils are prone to biological and mineral deposits, especially in Perth's warm, humid climate where moisture encourages algae and fungal growth.

The process involves applying chemical agents directly to the coil fins and tubes, allowing the solution to break down contaminants without damaging the aluminium or copper materials. Technicians rinse the coils thoroughly after the chemical treatment to remove the loosened debris and residual solution.

A chemical wash differs from a standard rinse or basic cleaning. Basic water rinsing alone often fails to remove embedded mould or biological film. Chemical treatment penetrates deeper, restoring cooling efficiency that gets compromised when coils become fouled. Reduced airflow through clogged coils forces your compressor to work harder, raising energy consumption and risking premature component failure.

Regular chemical cleaning helps maintain heat transfer performance, improves air quality by limiting mould spread into your home, and extends the working life of the coil assembly. The frequency depends on your environment, filter maintenance habits, and system usage. High-dust areas or properties near vegetation may benefit from more frequent cleaning.

Find local contractors who offer chemical wash services as part of routine maintenance or targeted deep-clean work.