The Problem
The homeowner of a two-storey bungalow along Jalan Maarof in Bangsar contacted Masters Aircond Service KL after noticing that several rooms in the house felt warmer than usual despite the airconds running at full blast. The family had not serviced their 6 Panasonic wall-mounted units in over 14 months — well past the recommended 3-month servicing interval for Malaysian homes.
The master bedroom unit was producing a noticeable musty smell, and the children's room unit was dripping water onto the floor. The living room unit on the ground floor, a Panasonic CS-S18TKH 2.0HP inverter, was cycling on and off every few minutes — a classic sign of an overworked compressor struggling against clogged filters and coils.
Our Assessment
Our team arrived at 9am on a Saturday morning — the homeowner's preferred timing since the family would be home. Upon initial inspection of all 6 units, we found:
- Heavy dust buildup on all air filters — some filters were nearly 80% blocked
- Mould growth on the evaporator coils of the master bedroom and guest room units
- Clogged drainage pipe on the children's room unit causing the water leak
- Dirty blower fan across all units, reducing airflow by an estimated 30–40%
None of the units had any mechanical or electrical faults — this was purely a maintenance issue. A thorough aircond servicing would restore all 6 units to optimal performance without the need for chemical treatment or part replacement.
Work Timeline
Step 1: Filter Removal & Soaking
Removed all 6 air filters and soaked them in anti-bacterial cleaning solution for 20 minutes while we worked on the indoor units.
Step 2: Evaporator Coil Cleaning
Applied coil cleaner foam to each evaporator coil and brushed off accumulated dirt and mould. The master bedroom unit required extra attention due to visible black mould patches.
Step 3: Blower Fan Deep Clean
Used a high-pressure water spray to clean each blower fan barrel. Extracted thick layers of dust that had been restricting airflow for months.
Step 4: Drainage Line Flushing
Flushed all 6 drainage lines with pressurised water. Cleared the blockage in the children's room unit — the clog was caused by algae buildup inside the drain hose.
Step 5: Reassembly & Testing
Reinstalled cleaned filters, reassembled all front panels, and ran each unit for 15 minutes to verify cooling output and drainage flow. All units passed.
Results
Lessons & Advice
This job was a textbook example of what happens when aircond servicing is delayed. Fourteen months without cleaning in Malaysia's humid tropical climate is more than enough for mould to grow, drains to clog, and efficiency to drop significantly. The homeowner noticed their TNB electricity bill had increased by roughly RM80–100/month — likely because the units were working harder to compensate for restricted airflow.
For bungalows with multiple units, we recommend a maintenance contract — quarterly servicing keeps every unit running efficiently and prevents the kind of issues we found here. The homeowner agreed and signed up for our annual plan covering all 6 units with 4 visits per year at RM1,200/year.
If your aircond smells musty or isn't cooling like it used to, don't wait. A basic servicing is one of the most affordable ways to extend the life of your aircond and keep your electricity bills in check.
Kevin Chong
Kevin founded Masters Aircond Service KL with one goal: honest, reliable aircond servicing across Kuala Lumpur. With over 12 years in the industry, he personally oversees every major project.
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