AC Not Turning On At All? Troubleshooting Guide Before You Book a Repair

Check these first — in order

Working through this in sequence usually finds the issue faster than jumping around.

• Power supply — confirm the breaker/MCB for the AC hasn't tripped, and the socket has power
• Remote control — check batteries, and confirm it's not accidentally set to a delayed-start timer
• Display panel — check for any blinking error code, which points to a specific fault rather than a general power issue
• Stabiliser (if you use one) — confirm it's switched on and showing normal output
• Manual power button on the unit itself — test whether the unit responds to the manual button even if the remote doesn't

If the basics check out and it still won't start

This usually points to something that needs a technician — a failed capacitor preventing the compressor from starting, a PCB fault, or an internal safety cutoff triggered by an issue like a blocked drain or overheating. At this point, further self-troubleshooting risks doing more harm than good, especially with anything involving the unit's internal electronics.

A sign worth mentioning specifically when you call

If the outdoor unit hums but doesn't fully start, that's a specific and useful detail — it often points to a capacitor issue rather than a broader electrical fault, and mentioning it can help the technician arrive prepared with the likely part needed.

Frequently asked questions