Chemical Overhaul

Wall-mounted 1.0–1.5 HP: RM 220. Wall-mounted 2.0–2.5 HP: RM 280. Wall-mounted 3.0–3.5 HP: RM 350. Ceiling cassette 1.0–3.0 HP: RM 430. Ceiling cassette 3.5–5.0 HP: RM 500. Ceiling cassette overhauls take longer because the unit is integrated into the ceiling grid and requires more disassembly work. All prices confirmed before technician begins. Multi-unit discount applies: 5% off 2–3 units, 10% off 4–8 units.

Use this decision guide: (1) Water leaking from the indoor unit → likely overhaul (drain pan/tray blocked or cracked). (2) Ice visible on the coil or copper pipe → overhaul (coil is so dirty that refrigerant cannot absorb heat, causing freezing). (3) Extremely foul, rotten smell even after cleaning → overhaul (biofilm deep inside blower barrel and housing). (4) Unit not opened/cleaned in 3+ years → overhaul. (5) Chemical wash done 6 months ago and problem is back → overhaul (surface clean not enough). If symptoms are mild — slightly weak cooling, light musty smell, no leaks — a chemical wash (RM 120) is likely sufficient. WhatsApp us your symptoms and we will advise honestly.

In approximately 90–95% of persistent leak cases, yes. The root cause is almost always a drain pan caked with biofilm and mineral deposits, a clogged drain outlet, or a cracked drain tray — all of which are fully accessible only during a complete overhaul. During the service, we individually clean the drain pan and tray, verify the drain path with a water test, and inspect for hairline cracks. If a crack is found (rare, usually on 8+ year old units), we will show you and discuss replacement options. But in most cases, a thorough chemical overhaul stops the leaking for good.

Wall-mounted 1.0–1.5 HP: 2–2.5 hours. Wall-mounted 2.0–3.5 HP: 2.5–3 hours. Ceiling cassette: 3–4 hours (more disassembly due to ceiling grid integration). We do not rush — proper drying of components before reassembly is critical to prevent electrical shorts. If you have multiple units needing overhaul, we can schedule them on the same day and complete them sequentially.

Ice on the indoor coil is a serious symptom. It means the coil is so dirty or blocked that refrigerant cannot absorb enough heat, causing the coil temperature to drop below freezing. If you see ice, turn the unit OFF immediately and run the fan only to defrost it — continuing to run with ice can damage the compressor. Once defrosted, a chemical overhaul is almost always required because the blockage is deep inside the coil. A chemical wash may help short-term but the ice will return within weeks if the coil is severely clogged. WhatsApp us immediately if you see ice — we can often dispatch same-day.

No. Our technician performs a ‘pump-down’ procedure before removing the indoor unit: the refrigerant is pumped back into the outdoor condenser unit and the service valves are closed, so no gas is lost. The unit is reconnected to the same refrigerant charge after reassembly. If your refrigerant level was already low before the overhaul (which we check during the initial diagnostic), we will inform you and quote a top-up separately. The overhaul itself does not consume or release any refrigerant.

Yes. Every chemical overhaul includes a mandatory high-pressure nitrogen test or electronic leak sweep after reassembly to ensure the sealed system is 100% airtight.

Significantly. By removing heavy sludge from the blower wheel and lubricating fan motor mounts, we eliminate the imbalances that cause vibration and high-frequency noise.

Choose chemical overhaul when the aircond has severe weak airflow, repeated leaking, ice formation, bad smell that returns quickly, or years of heavy dirt inside the blower and back tray.

For a proper wall-mounted chemical overhaul, the indoor unit is dismantled so hidden parts can be cleaned more thoroughly than a normal front chemical wash.

Yes. KL Renovator confirms the service scope, starting price and any extra material or repair cost before work begins.

Yes. Eligible workmanship is covered by a 1-month workmanship warranty. Warranty terms are explained clearly before handover.

Yes. Eligible multi-unit bookings can receive 5% off for 2–3 units, 10% off for 4–8 units and 15% off for 8+ units, confirmed before booking.