Coil Cleaning Procedure is the systematic process of removing dirt, scale, and biological growth from evaporator and condenser coils to restore heat transfer efficiency. This procedure requires specialized tools and chemical cleaners to safely restore coil function without damaging aluminum or copper fins.
Cleaning Process
Technicians first isolate the coil from active refrigerant flow by closing isolation valves. Protective coverings are installed to prevent runoff contamination. Coils are pre-rinsed with water or specialized pre-wash solutions to loosen debris. Heavy accumulation is gently brushed with soft-bristled brushes working parallel to fin direction. Chemical coil cleaner is applied and allowed to dwell for 10 to 15 minutes. Thorough rinsing with clean water removes all residue and chemical traces. Final inspection confirms complete debris removal.
Equipment Protection
Pressure washers must not exceed 300 pounds per square inch to prevent fin damage. Chemical cleaners must be appropriate for aluminum or copper construction. Drain pan cleaning and line treatment prevent microbial regrowth. Proper coil pitch ensures drainage of cleaning solutions.
Efficiency Restoration
Severely fouled coils lose 30 to 50 percent heat transfer capacity. Professional cleaning restores 20 to 35 percent efficiency improvement. Coil cleaning costs 150 to 400 dollars but extends equipment life and reduces energy consumption significantly.