# Aircon Guides | Aircon Expert > Plain-English aircon guides from Aircon Expert: servicing, chemical wash, repairs, installation, gas top-ups and overhauls, written for Malaysian homes. URL: https://www.airconexpert.com.my/guide/ ![](/images/cta/aircon-technician-explaining-open-indoor-unit-coil.webp) Learn Before You Book # Aircon Guides 33 practical guides written by our technicians. Find out what's wrong with your unit, what each service involves, and what it should cost, before you book anything. ## Aircon Servicing Basics Servicing intervals, costs, DIY limits and what to expect from a normal general service. View the service → [/#general-servicing →](/#general-servicing) ![Technician servicing a ceiling cassette in a small KL office after hours](/images/featured/technician-on-ladder-servicing-ceiling-cassette-ai.webp) ### Aircon Maintenance for Offices and Shops: Planning a Service Schedule Plan multi-unit aircon maintenance for offices, shops and F&B lots: intervals, staggered servicing, after-hours slots and multi-unit pricing. 6 min read [Aircon Maintenance for Offices and Shops: Planning a Service Schedule →](/guide/office-shop-aircon-maintenance-schedule/) ![Homeowner holding a TNB electricity bill in a living room with the aircon running](/images/featured/hand-holding-tnb-electricity-bill-in-malaysian-liv.webp) ### Can Regular Aircon Servicing Lower Your TNB Electricity Bill? How dirty filters and coils raise power draw, what a service restores, and simple habits that cut your TNB bill. 5 min read [Can Regular Aircon Servicing Lower Your TNB Electricity Bill? →](/guide/aircon-servicing-electricity-bill/) ![Homeowner rinsing an aircon filter under a bathroom tap](/images/featured/homeowner-rinsing-aircon-filter-under-bathroom-tap.webp) ### DIY Aircon Cleaning vs Professional Service: What's Safe to Do Yourself Which aircon cleaning jobs are safe to DIY (filter rinse, cover wipe) and which need a technician: chemicals, electrics and drains. 5 min read [DIY Aircon Cleaning vs Professional Service: What's Safe to Do Yourself →](/guide/diy-aircon-cleaning-vs-professional-service/) ![Technician rinsing aircon filters at a condo balcony sink in Kuala Lumpur](/images/featured/technician-rinsing-aircon-filters-at-kl-condo-balc.webp) ### How Often Should You Service Your Aircon in Malaysia? Servicing intervals for bedroom, living-room and office aircons in Malaysia's hot, humid climate, and when to step up to a chemical wash. 5 min read [How Often Should You Service Your Aircon in Malaysia? →](/guide/how-often-service-aircon-malaysia/) ![Technician spraying foaming coil cleaner into an indoor unit with a wash bag attached](/images/featured/technician-spraying-foaming-coil-cleaner-into-wall.webp) ### Normal Aircon Service vs Chemical Wash: Which Does Your Unit Need? Normal service (RM120) vs chemical wash (from RM160): scope, price and the symptoms that mean your unit needs the deeper clean. 6 min read [Normal Aircon Service vs Chemical Wash: Which Does Your Unit Need? →](/guide/normal-aircon-service-vs-chemical-wash/) ![Technician vacuuming an indoor aircon unit with a plastic sheet over the bed](/images/featured/technician-vacuuming-indoor-aircon-unit-in-malaysi.webp) ### What Happens During a Normal Aircon Service? Step by step: filter wash, coil and blower cleaning, vacuuming, outdoor check and test run, plus time per unit and how to prepare. 5 min read [What Happens During a Normal Aircon Service? →](/guide/what-happens-during-normal-aircon-service/) ## Aircon Chemical Wash Deep chemical cleaning of the coil, blower wheel and drain pan that removes mould, bacteria and odour from split and ceiling cassette units. View the service → [/aircon-chemical-wash/ →](/aircon-chemical-wash/) ![Technician on a ladder removing a ceiling cassette panel in a café after hours](/images/featured/technician-on-ladder-removing-4-way-ceiling-casset.webp) ### Ceiling Cassette Aircon Chemical Wash: What's Different Why cassette units need a different chemical wash setup, prices from RM270 to RM650 by HP, and planning downtime in offices and shops. 5 min read [Ceiling Cassette Aircon Chemical Wash: What's Different →](/guide/ceiling-cassette-aircon-chemical-wash/) ![Dismantled aircon parts soaking in tubs beside a unit being washed in place](/images/featured/dismantled-aircon-parts-soaking-in-plastic-tubs-on.webp) ### Chemical Wash vs Chemical Overhaul: What's the Real Difference? Washed in place vs fully dismantled: scope, price (from RM160 vs RM180 to RM220), the free gas top-up with an overhaul, and which unit needs which. 6 min read [Chemical Wash vs Chemical Overhaul: What's the Real Difference? →](/guide/chemical-wash-vs-chemical-overhaul/) ![Bedroom with furniture moved aside and a plastic sheet under the aircon](/images/featured/malaysian-bedroom-with-furniture-pushed-aside-and-.webp) ### How Long Does an Aircon Chemical Wash Take and How to Prepare Typical time per unit, how to prepare the room, how water and mess are contained, and the 7-day follow-up check. 4 min read [How Long Does an Aircon Chemical Wash Take and How to Prepare →](/guide/how-long-aircon-chemical-wash-takes/) ![Living room aircon above a sofa with a cat and an open-plan kitchen behind](/images/featured/living-room-wall-aircon-above-sofa-with-cat-loungi.webp) ### How Often Does Your Aircon Need a Chemical Wash? Chemical wash intervals by usage and environment (dust, cooking, pets), how to combine them with normal servicing, and signs it's overdue. 4 min read [How Often Does Your Aircon Need a Chemical Wash? →](/guide/how-often-aircon-chemical-wash/) ![Technician in gloves rinsing an aircon coil with a wash bag attached](/images/featured/technician-in-gloves-rinsing-aircon-coil-with-spra.webp) ### Is Aircon Chemical Wash Safe for Your Unit and Your Family? Coil-safe solutions, full rinsing and certified chemical handling, when you can use the room again, and the 30-day workmanship warranty. 4 min read [Is Aircon Chemical Wash Safe for Your Unit and Your Family? →](/guide/is-aircon-chemical-wash-safe/) ![Foaming cleaner on an evaporator coil with a wash bag catching dark runoff](/images/featured/foaming-cleaner-on-aircon-evaporator-coil-with-was.webp) ### What Is an Aircon Chemical Wash and How Does It Work? How a chemical wash cleans the evaporator coil, blower wheel and drain pan, what 99.9% bacteria removal means, and the results to expect. 6 min read [What Is an Aircon Chemical Wash and How Does It Work? →](/guide/what-is-aircon-chemical-wash/) ![Woman reacting to a bad smell from a bedroom aircon](/images/featured/woman-wrinkling-nose-under-bedroom-wall-aircon-in-.webp) ### Why Does My Aircon Smell Bad? Mould, Bacteria and the Fix Musty, burning or sour aircon smells explained: what causes each, health concerns, and when a chemical wash fixes it vs a repair. 6 min read [Why Does My Aircon Smell Bad? Mould, Bacteria and the Fix →](/guide/why-does-my-aircon-smell-bad/) ## Aircon Repair Diagnosis and repair of warm air, water leaks, strange noises and electrical faults, with a 24-hour response guarantee. View the service → [/aircon-repair/ →](/aircon-repair/) ![Indoor aircon with an orange timer light blinking in a dim bedroom](/images/featured/indoor-aircon-unit-with-small-orange-timer-light-b.webp) ### Aircon Blinking Light Error Codes: Daikin, Panasonic, Mitsubishi, Acson What a blinking timer or operation light means on Daikin, Panasonic, Mitsubishi and Acson aircons, safe resets and when to book a diagnosis. 7 min read [Aircon Blinking Light Error Codes: Daikin, Panasonic, Mitsubishi, Acson →](/guide/aircon-blinking-light-error-codes/) ![Technician testing outdoor unit wiring with a multimeter on a condo ledge](/images/featured/outdoor-aircon-unit-on-condo-ledge-with-cover-off-.webp) ### Aircon Outdoor Unit Not Running: Capacitor and Compressor Faults Fan-only cooling explained: run capacitor vs compressor vs contactor symptoms, how technicians test them, and repair vs replace. 6 min read [Aircon Outdoor Unit Not Running: Capacitor and Compressor Faults →](/guide/aircon-outdoor-unit-not-running/) ![An old yellowed aircon on the wall next to a boxed new unit on the floor](/images/featured/yellowed-old-wall-aircon-in-petaling-jaya-terrace-.webp) ### Aircon Repair or Replace? How to Decide for an Older Unit Age, fault type and repeat failures vs repair cost (RM80 to RM200 labour plus parts) and new unit prices, plus inverter efficiency gains. 6 min read [Aircon Repair or Replace? How to Decide for an Older Unit →](/guide/aircon-repair-or-replace/) ![Hand flipping a tripped breaker in a home DB box](/images/featured/hand-flipping-tripped-breaker-in-malaysian-home-db.webp) ### Aircon Won't Turn On or Keeps Tripping: What to Check First Safe first checks for the remote, breaker and power, why repeated tripping is a safety issue, common electrical causes, and 24-hour help. 5 min read [Aircon Won't Turn On or Keeps Tripping: What to Check First →](/guide/aircon-wont-turn-on-or-keeps-tripping/) ![Technician checking outdoor unit wiring with a clamp meter while the homeowner watches](/images/featured/technician-with-clamp-meter-on-outdoor-aircon-unit.webp) ### What to Expect When a Technician Diagnoses Your Aircon Pressure and amp checks, leak testing, a clear quote before any work, a transparent labour range and a 7-day follow-up check. 5 min read [What to Expect When a Technician Diagnoses Your Aircon →](/guide/what-to-expect-aircon-diagnosis/) ![Water stain on the wall below a dripping aircon with a towel on the floor](/images/featured/water-drip-stain-on-wall-below-wall-aircon-with-to.webp) ### Why Is My Aircon Leaking Water Inside? (Including Aircon Jelly) Clogged drains and aircon jelly, dirty blowers, frozen coils or tilted installs: why aircons drip indoors and how to fix it fast. 6 min read [Why Is My Aircon Leaking Water Inside? (Including Aircon Jelly) →](/guide/aircon-leaking-water-inside/) ![Technician listening closely to an outdoor aircon unit on a terrace house wall](/images/featured/technician-with-ear-near-outdoor-aircon-unit-on-te.webp) ### Why Is My Aircon Making a Strange Noise? Rattling, buzzing, clicking, hissing or squealing: what each aircon noise means, which need an immediate shutdown, and repair next steps. 6 min read [Why Is My Aircon Making a Strange Noise? →](/guide/aircon-making-strange-noise/) ![Man holding the remote under a wall aircon on a hot afternoon](/images/featured/man-holding-remote-under-wall-aircon-fanning-himse.webp) ### Why Is My Aircon Not Cold? Causes of Warm Air Dirty filter or coil, low refrigerant, a capacitor or compressor fault, or the wrong settings: quick checks and when to call for repair. 6 min read [Why Is My Aircon Not Cold? Causes of Warm Air →](/guide/why-is-my-aircon-not-cold/) ## Aircon Installation Professional installation of new or replacement units, with supply of 9 major brands and a 30-day workmanship warranty. View the service → [/aircon-installation/ →](/aircon-installation/) ![Copper piping, brackets and insulation laid out before an aircon installation](/images/featured/copper-piping-coils-brackets-and-insulation-tubes-.webp) ### Aircon Installation Charges in Malaysia: What's Included and What Costs Extra What the base package includes (from RM280, 1.0 HP, 10 ft piping), typical extras like piping, brackets and trunking, and how quotes work. 6 min read [Aircon Installation Charges in Malaysia: What's Included and What Costs Extra →](/guide/aircon-installation-charges-malaysia/) ![Boxed aircon units stacked in a small electrical shop storeroom](/images/featured/several-boxed-aircon-units-stacked-in-small-malays.webp) ### Best Aircon Brands in Malaysia Compared Daikin, Panasonic, Mitsubishi, Acson, LG, Samsung, Sharp, Midea and Hitachi compared on price tier, inverter range and servicing. 8 min read [Best Aircon Brands in Malaysia Compared →](/guide/best-aircon-brands-malaysia/) ![Technician with a safety harness working on outdoor units on a condo aircon ledge](/images/featured/outdoor-aircon-units-on-kl-condo-aircon-ledge-with.webp) ### Installing Aircon in a Condo: Outdoor Unit Placement and Access Outdoor unit ledge and bracket placement, piping beyond the included 10 ft, management approval and drainage routing in condos. 6 min read [Installing Aircon in a Condo: Outdoor Unit Placement and Access →](/guide/condo-aircon-installation/) ![An older non-inverter and a newer inverter outdoor unit side by side on a wall](/images/featured/two-outdoor-aircon-units-side-by-side-on-terrace-h.webp) ### Inverter vs Non-Inverter Aircon: Electricity Cost in Malaysia How inverter compressors work, an illustrative TNB running-cost comparison in RM, energy star labels and which usage suits each type. 7 min read [Inverter vs Non-Inverter Aircon: Electricity Cost in Malaysia →](/guide/inverter-vs-non-inverter-aircon-malaysia/) ![Open-plan semi-D living room with a 4-way ceiling cassette aircon](/images/featured/open-plan-semi-d-living-room-with-4-way-ceiling-ca.webp) ### Wall-Mounted vs Ceiling Cassette Aircon: Which Suits Your Space? Airflow coverage, ceiling requirements, looks, install and long-term cleaning costs (cassette wash from RM270) and best-fit rooms. 6 min read [Wall-Mounted vs Ceiling Cassette Aircon: Which Suits Your Space? →](/guide/wall-mounted-vs-ceiling-cassette-aircon/) ![Measuring tape across a condo bedroom floor beside the wall where the aircon will go](/images/featured/measuring-tape-across-malaysian-condo-bedroom-floo.webp) ### What HP Aircon Do I Need? Room Size Guide for Malaysian Homes Match room size in sq ft to 1.0 to 2.5 HP, adjust for west-facing, top-floor and kitchen-adjacent rooms, and avoid under- or over-sizing. 7 min read [What HP Aircon Do I Need? Room Size Guide for Malaysian Homes →](/guide/what-hp-aircon-do-i-need/) ![Technician drilling a wall core hole for aircon piping with a dust sheet below](/images/featured/technician-drilling-wall-core-hole-for-aircon-pipi.webp) ### What to Expect on Aircon Installation Day Site check, drilling, piping and insulation, vacuuming the lines, test run, typical duration, clean-up, 30-day warranty and 7-day follow-up. 5 min read [What to Expect on Aircon Installation Day →](/guide/what-to-expect-aircon-installation-day/) ## AC Gas Top-Up Refrigerant top-up after a proper pressure check, with a 1-month warranty and honest advice when a leak repair is needed instead. View the service → [/aircon-gas-top-up/ →](/aircon-gas-top-up/) ![Frost on the copper suction pipe at an outdoor aircon unit](/images/featured/frost-on-copper-suction-pipe-at-outdoor-aircon-uni.webp) ### Does My Aircon Really Need a Gas Top-Up? Signs of Low Refrigerant Weak cooling, frosted pipes and hissing explained, how a pressure check works, and why sealed systems shouldn't need routine top-ups. 5 min read [Does My Aircon Really Need a Gas Top-Up? Signs of Low Refrigerant →](/guide/does-my-aircon-need-gas-top-up/) ![Refrigerant cylinders in a technician's service van](/images/featured/refrigerant-gas-cylinders-in-technician-service-va.webp) ### R32 vs R410A vs R22: Aircon Refrigerant Types Explained Which aircons use R32, R410A or R22, the R22 phase-out, R32 handling considerations, and why refrigerants can't be mixed. 6 min read [R32 vs R410A vs R22: Aircon Refrigerant Types Explained →](/guide/r32-vs-r410a-vs-r22-refrigerant/) ![Greenish corrosion on a copper flare joint at the outdoor unit](/images/featured/greenish-corrosion-on-copper-flare-joint-at-outdoo.webp) ### Why Does My Aircon Keep Losing Gas? Leaks vs Top-Up Myths Common leak points (flare joints, corroded pipes), leak testing, why repeated top-ups waste money, and the 1-month top-up warranty. 6 min read [Why Does My Aircon Keep Losing Gas? Leaks vs Top-Up Myths →](/guide/why-aircon-keeps-losing-gas/) ## Aircon Overhaul Full dismantle cleaning for heavily soiled or neglected units, with a complimentary gas top-up included. View the service → [/aircon-overhaul/ →](/aircon-overhaul/) ![Aircon covers and blower wheel soaking in tubs on a terrace porch](/images/featured/aircon-covers-and-blower-wheel-soaking-in-plastic-.webp) ### What Happens During an Aircon Overhaul (Full Dismantle Cleaning) Dismantling, component soaking and washing, reassembly, a complimentary gas top-up and test run, plus time required and the RM180 to RM220 price. 5 min read [What Happens During an Aircon Overhaul (Full Dismantle Cleaning) →](/guide/what-happens-during-aircon-overhaul/) ![Heavily mouldy blower wheel visible through the louvre of an old aircon](/images/featured/heavily-mouldy-black-blower-wheel-visible-through-.webp) ### When Is an Aircon Overhaul Worth It? Signs Your Unit Needs One Heavy mould, a blocked blower, odour after a wash or years without service: signs your aircon needs an overhaul, and when to replace instead. 4 min read [When Is an Aircon Overhaul Worth It? Signs Your Unit Needs One →](/guide/when-is-aircon-overhaul-worth-it/) ![](/images/misc/aircon-technician-writing-service-checklist-on-cli.webp) Available 24/7, including public holidays ## Rather Have a Technician Check It? Send us your unit type, HP and area. We respond within 24 hours, 24/7, and confirm the price before any work starts. Call 011-6622 3922 [tel:+601166223922 →](tel:+601166223922) WhatsApp for a Quote [https://wa.me/60126827539?text=Hi%20Aircon%20Expert%2C%20I%20would%20like%20to%20book%20an%20aircon%20service. →](https://wa.me/60126827539?text=Hi%20Aircon%20Expert%2C%20I%20would%20like%20to%20book%20an%20aircon%20service.) - Price confirmed before work - 30-day workmanship warranty - Technicians with 3+ years' experience