🔥 Why Is There a Burning Smell From the Aircon?

A burning smell coming from your aircon should never be ignored. Unlike musty or dusty smells, a burning odour often signals an electrical or mechanical issue that can worsen quickly if the unit continues running.

In Singapore homes, this problem is usually linked to electrical parts, motors, or components overheating due to wear, dust buildup, or faults.

Here are the most common causes.

1. Overheating Electrical Components

Aircons rely on electrical parts such as wiring, capacitors, and circuit boards. If these components overheat, they may produce a sharp burning or plastic-like smell.

Common reasons:

• Loose or damaged wiring

• Overloaded electrical parts

• Faulty PCB board

• Aging components

This smell often appears shortly after switching the aircon on.

2. Dust Burning Off Internal Parts

If the aircon has not been used for a long time, dust can accumulate on the coil, motor, or heater components. When the system is turned on, the dust may burn off temporarily.

Signs:

• Burning smell only during first use

• Smell fades after a short while

While this may be less serious, frequent or strong burning smells still require inspection.

3. Blower Fan or Motor Overheating

The blower fan motor works continuously to push air into the room. If the motor is worn, dirty, or struggling, it may overheat and emit a burning smell.

Symptoms:

• Weak airflow

• Unusual noise

• Smell becomes stronger with longer usage

This can lead to motor failure if not addressed.

4. Capacitor or Electrical Part Failure

A failing capacitor can overheat rapidly. This often causes a strong burning or chemical smell and may trigger power trips.

Warning signs:

• Aircon shuts off suddenly

• Clicking sounds

• Burning smell persists

This is a safety concern and should be handled immediately.

5. Foreign Objects Inside the Unit

In rare cases, insects, debris, or small foreign objects may get stuck inside the indoor or outdoor unit. When exposed to heat, they can cause a burning smell.

What You Should Do Immediately

If you notice a burning smell:

• Switch off the aircon immediately

• Turn off the power at the isolator

• Do not continue running the unit

• Arrange for professional inspection

Ignoring this issue may lead to electrical damage or fire risk.

How Sky Blue Aircon Can Help

At Sky Blue Aircon Engineering Pte Ltd, we take burning smell issues seriously and inspect the system thoroughly to identify the root cause.

Our checks include:

• Electrical wiring and PCB inspection

• Fan motor and capacitor testing

• Internal cleaning to remove dust buildup

• System safety and performance checks

We ensure your aircon runs safely and reliably.

💡 The Bottom Line

If you smell something burning from your aircon, it is a warning sign that should not be ignored. Fixing the issue early prevents electrical damage, protects your home, and keeps your aircon safe to use.

📲 Message us on WhatsApp at 9248 7291 or call 6556 4042.

Sky Blue Aircon Engineering Pte Ltd keeping Singapore homes cool, clean, and comfortable.