1. Compressor or capacitor fault
A failing compressor or capacitor draws too much current when starting, which trips the breaker.
How we fix itDiagnosis and part replacementAircon repair: $80 diagnosis →
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Why Does My Aircon Keep Tripping the Power?
An aircon that trips the power is an electrical safety issue. Here's what usually causes it and what to do.
The short answer
If your aircon trips the circuit breaker, there's usually an electrical fault: water reaching the wiring, a faulty capacitor or compressor, or damaged wiring. Don't keep resetting the breaker. Switch the isolator off and get it checked.
Quick diagnosis: what is your aircon doing?
| What you notice | Likely cause | Fix | Cost |
|---|---|---|---|
| Trips right after switching on | Compressor or capacitor fault | Repair after diagnosis | $80 diagnosis* |
| Trips after heavy rain | Water in the outdoor unit wiring | Diagnosis and repair | $80 diagnosis* |
| Trips and leaks water indoors | Water reaching the indoor wiring | Servicing and repair | from $54.50 |
| Trips with a burning smell | Burnt wiring or PCB | Switch off, then repair | $80 diagnosis* |
| Trips when other appliances run | Overloaded circuit | Check by a licensed electrician | Varies |
Prices before GST. *On-site diagnosis is $80 for a split system and is waived when you book the repair.
5 reasons your aircon trips the power, and how to fix each
2. Water in the wiring
Heavy rain or a blocked drain can let water reach the wiring and cause a short.
How we fix itDry out, repair and sealAircon repair: $80 diagnosis →
3. Damaged wiring
Old, loose or pest-damaged wiring can short and trip the power.
How we fix itWiring check and repairAircon repair: $80 diagnosis →
4. Control board (PCB) fault
A damaged PCB can cause a short circuit.
How we fix itPCB repair or replacementAircon repair: $80 diagnosis →
5. Overloaded circuit
Too many appliances on one circuit can trip it. This needs a licensed electrician.
How we fix itElectrician check
What you can check yourself
- Switch off the isolator next to the aircon.
- Reset the breaker only once.
- Look for water or leaks around the indoor and outdoor units.
- Don't use extension cords for the aircon.
- Note when it trips: on start-up, after rain, or after running a while.
Never keep resetting a breaker that trips again. Leave the aircon off until it's checked.
Aircon tripping power: FAQs
How much does it cost to fix an aircon that trips the power?
At JL Aircond, on-site diagnosis is $80 for a split system and $110 for VRV/VRF, waived if you book the repair. We confirm the price before any work.
Is it safe to keep resetting the breaker?
No. A breaker trips to protect you from an electrical fault. Resetting it again and again can cause damage or a fire risk.
Why does my aircon trip after rain?
Rainwater can get into the outdoor unit's wiring and cause a short circuit. It needs to be dried, repaired and sealed.
Can a dirty aircon trip the power?
Indirectly, yes. A blocked drain can overflow and let water reach the wiring, which can trip the breaker.
Aircon still tripping? We'll check it safely.
Tell us when it trips and your aircon brand on WhatsApp. We'll arrange a technician to check it.