Professional Chemical Overhaul Service in Petaling Jaya

When Your Aircond Needs More Than a Chemical Wash

Sometimes a standard chemical wash is not enough. If your air conditioner has been neglected for over a year, is barely cooling despite a recent gas top-up, or produces a persistent foul odour even after cleaning, the contamination has likely penetrated deep into every component. Surface-level treatment will not solve the problem. Your unit needs a complete chemical overhaul.

A chemical overhaul is the most thorough aircond service available. It involves a full teardown of the indoor unit, with every removable component individually soaked in professional-grade chemical solution. The evaporator coil receives intensive restoration treatment to dissolve years of embedded grime, mould and bacteria. It is the last line of defence before considering a full unit replacement — and in many cases, it restores performance to near-new levels.

The Full Chemical Overhaul Process

At PJ Kool Aircond Service, our chemical overhaul is carried out exclusively by senior technicians with 10 or more years of hands-on experience. This is not a job for trainees — the complete disassembly and reassembly of an aircond unit demands expert knowledge of every brand and model.

Complete Unit Teardown

Unlike a chemical wash where the main components are removed, a chemical overhaul involves stripping the indoor unit down to its core. Every accessible component — filters, blower wheel, fan barrel, drainage tray, front and back panels, louvres and housing — is carefully removed and catalogued.

Individual Component Soaking

Each removed component is placed in a chemical bath and left to soak. The professional-grade solution breaks down deeply embedded dirt, grease, mould and bacterial colonies that have built up over months or years. This extended soaking is what sets an overhaul apart from a standard wash — it reaches contamination that spraying alone cannot dissolve.

Evaporator Coil Deep Restoration

The evaporator coil is the heart of your aircond’s cooling system. When its fins become clogged with dirt and mould, heat exchange efficiency drops dramatically. During a chemical overhaul, the coil receives multiple passes of intensive chemical treatment, restoring airflow between the fins and recovering cooling capacity that you may have thought was permanently lost.

Drainage System Overhaul

Water leaks are one of the most common complaints we hear from homeowners in Petaling Jaya, Damansara and Subang. In Malaysia’s humid climate, algae and mould grow rapidly inside drainage pipes, eventually causing blockages. Our overhaul includes a complete drainage system flush — tray, pipe and outlet — along with an inspection for cracks or deterioration that could cause future problems.

Pricing — Transparent and All-Inclusive

Our chemical overhaul pricing is based on unit capacity:

• 2.0 - 3.0 HP: RM280 per unit
• 3.5 - 4.0 HP: RM350 per unit
• 5.0 - 6.0 HP: RM400 per unit

Every price includes the complete teardown, chemical soaking, coil restoration, drainage overhaul and a FREE gas top-up of up to 10kg (R22, R32 or R410A). There are no hidden charges — we confirm the cost before any work begins.

Save Thousands — Overhaul Before You Replace

A new aircond unit with installation can easily cost RM2,000 to RM5,000 or more. Before committing to that expense, a chemical overhaul at a fraction of the price may be all your unit needs. Not sure whether you need a wash or a full overhaul? Read our comparison guide: chemical wash vs chemical overhaul. We have restored hundreds of units across Petaling Jaya that owners had assumed were beyond saving. In many cases, the improvement in cooling performance is immediate and dramatic.

Of course, not every unit can be saved. If our technician determines that your compressor is failing or the unit has sustained irreparable damage, we will tell you honestly and recommend replacement options instead. We never perform an overhaul on a unit that we believe will not benefit from it.

Who Should Choose Chemical Overhaul?

A chemical overhaul is recommended if your aircond:

• Has not been serviced in 12 months or longer
• Is cooling very weakly despite a recent gas top-up
• Produces a persistent musty, sour or mouldy smell
• Has visible heavy mould or dark discolouration on the coil
• Leaks water frequently even after drainage clearing
• Is running but barely producing cold air

For units that have been maintained with regular chemical washes, an overhaul is typically not necessary. Our technician will always recommend the most appropriate service for your situation.

Serving the Entire Klang Valley

PJ Kool Aircond Service provides chemical overhaul appointments across Petaling Jaya, Damansara Utama, Damansara Jaya, Kelana Jaya, Bandar Utama, Kota Damansara, Subang Jaya, USJ, Puchong, Bandar Sunway and surrounding areas. With over 20 years of trusted service in the community, we are the team homeowners and businesses turn to when their aircond needs serious attention.

Contact us today via WhatsApp to schedule an assessment. Our senior technician will inspect your unit, give you an honest recommendation and provide a confirmed price before any work begins. Every chemical overhaul comes with our 30-day service warranty for your peace of mind.