What Happens During an Aircond Chemical Wash -- Step by Step

You know how quickly air conditioning units lose their cooling power in this intense Malaysian heat.

Our team founded Aircond Service Pro Shah Alam with a simple mission: to provide exceptional HVAC services that customers can truly rely on.

This commitment means showing you exactly what happens when your unit gets completely stripped down.

We often see homeowners in Petaling Jaya and Shah Alam paying for basic wiping when their system desperately needs a deep internal wash.

Let’s walk through the complete aircond chemical wash process so you know exactly what to expect chemical wash services to deliver.

Before the Work Starts: Dismantle and Protection

The aircond dismantle and clean process begins with protecting your living space. Our technicians secure a heavy-duty plastic drip sheet directly against the wall beneath the indoor unit. A thick waterproof cover also goes over your floor to prevent any mess.

We do this to catch all the dark, contaminated water that streams out during the heavy rinsing phase. Your walls and flooring stay completely clean from start to finish.

Our chemical wash service involves taking the indoor unit entirely apart. The technician carefully detaches several core pieces:

• Front Panel & Filters: These surface elements come off first to expose the interior.
• Blower Wheel: We extract this cylindrical fan to clean off trapped lint.
• Evaporator Coil: The heavily soiled cooling fins are prepped for soaking.

We easily apply this straightforward sequence to standard units from popular Malaysian brands like Panasonic and Daikin. The process for ceiling cassette units requires more effort since the casing drops down from the ceiling, but the core principle remains identical.

By the time dismantling finishes, the actual coil and blower wheel are fully exposed. We routinely see these internal components caked in a thick layer of brown or grey dirt, especially if the unit has not been washed in over a year.

This heavy buildup severely restricts airflow and makes the compressor work much harder. If you want to understand exactly what each of these components does, check out this guide on what a chemical wash is for a plain-language explanation.

The Chemical Coil Wash and Drainage Flush

With the coil and blower exposed, the technician sprays a professional-grade alkaline coil cleaner across the aluminum fins. Our specific chemical solutions, such as Kool Wash, are formulated to dissolve grease and heavy biological growth without corroding the delicate metal. The foam sits for a few minutes to deeply penetrate the stubborn buildup.

We then blast the area with a high-pressure water rinse to flush everything out. Recent industry data shows that a chemical wash removes up to 99% of internal dirt, compared to just 30% from a standard surface wiping.

Next, the technician gives the blower wheel the exact same deep-cleaning treatment. Our team vigorously scrubs and soaks the blades to strip away layers of lint, dust, and accumulated mould. This specific step eliminates that sour, musty smell that many older units develop in humid climates.

The drainage tray and pipe require a separate, high-pressure flush. We often find a thick biofilm, locally known as “aircond jelly,” blocking the drain path. This slimy buildup actually causes up to 90% of water leaking issues in Malaysian homes. Our thorough flushing completely clears out this algae, ensuring condensation flows smoothly outside.

What the runoff water tells you

During the rinse, the water that drips off the coil is often surprisingly dark brown or grey. This is completely normal and is a visible sign of how much contamination has been removed. After the flush, the water should run clear, which confirms the coil is clean.

Reassembly, Gas Top-Up and Cooling Test

Once the coil and blower are clean and thoroughly dried, the technician reassembles the unit in reverse order. Our technicians double-check every single fitting, clip, and panel to ensure they are seated tightly. A proper seal prevents annoying rattling noises once the machine turns back on.

At Aircond Service Pro Shah Alam, every chemical wash includes a free gas top-up of up to 10kg covering R22, R32, and R410A refrigerants. We connect a pressure gauge directly to the outdoor compressor to verify the refrigerant levels. The technician tops up the gas to the exact required PSI if it falls below the standard line. Our free gas refill is permanently included in the quoted price, so you never face hidden charges.

Finally, the technician switches the unit on and lets it run for a few minutes. We run a three-point performance check:

• Airflow Strength: The fan should push air out powerfully without hesitation.
• Outlet Temperature: We measure the cold air to ensure optimal cooling.
• Drainage Flow: The water must drain outside without backing up.

You will notice significantly colder air coming from the vents almost immediately. Studies indicate that a fully cleaned aircon unit uses 15% to 30% less electricity, saving you real money on your monthly TNB bills.

Here are the standard aircond chemical wash steps Malaysia homeowners can expect from start to finish:

People frequently ask us how long does chemical wash take to complete. Our typical service takes about 60 to 90 minutes for a standard wall-mounted unit.

You do not need to vacate the room, though you might notice a faint chemical scent during the foaming step. We recommend opening a window for a few minutes while the high-pressure rinse happens.

If you are tired of weak airflow and high electricity bills, book a chemical wash with us today. Our service area covers Shah Alam, Setia Alam, Bukit Jelutong, Kota Kemuning, Petaling Jaya, and the wider Klang Valley. A clean system cools your room faster and protects your family from breathing in harmful mold spores.