Can I use generic parts to repair a Daikin air conditioner?

We recommend genuine Daikin parts. They're matched to your model's exact specifications for a guaranteed fit, and they keep the system running at the efficiency it was designed for — which matters especially with Daikin's inverter components, built to work with the unit's control system. Tell us your model and we'll confirm the right genuine part.

Where do I find the model number on my Daikin unit to order parts?

It's on the Compliance Plate — a silver or white label on the indoor unit (usually on the side, or behind the front cover) and on the side of the outdoor unit. Note both the model number and any version. If you can't read it, send us a photo and we'll identify it.

How fast can I get replacement Daikin parts delivered in Australia?

Stocked items ordered before 1:00 PM AEST dispatch the same day from our Gold Coast warehouse, with delivery Australia-wide.

Common Daikin AC Spare Parts Needed for Repairs: A Technician's Sourcing Guide

Common genuine Daikin spare parts — PCB, fan motor, capacitor — National AC Parts

The Daikin AC spare parts most often needed for residential and commercial repairs are inverter PCB mainboards, outdoor fan motors, thermistors (temperature sensors), running capacitors, contactors and compressors. Because Daikin systems use inverter technology, fitting the genuine, model-matched component is what restores correct operation, clears the underlying fault, and keeps the system running at its designed efficiency. This guide runs through the parts that fail most, the symptoms that point to each, and how to get the right one.

The Most Frequently Replaced Daikin Spare Parts

When a Daikin split or ducted system breaks down, the fault usually falls into one of a handful of electrical or mechanical parts. Here's what technicians request most — and where to find each on our site.

1. Inverter & Main PCB Boards

Why they fail: Power surges, electrical storms, and insect ingress — ants nesting in the unit are a common culprit in Australia.
Symptoms: System completely dead, no communication between indoor and outdoor units, or a flashing timer light.
Related Fault Codes: U4 (no communication between the indoor and outdoor units) and L5 (inverter overcurrent, DC output).

2. Outdoor Fan Motors & Indoor Blower Motors

Why they fail: Operational wear and bearing degradation over years, accelerated by coastal conditions.
Symptoms: Squealing or grinding, the outdoor fan spins slowly or not at all, the system trips on thermal overload.
Related Fault Codes: E7 (outdoor fan motor system fault) and A6 (indoor fan motor fault).

3. Thermistors and Temperature Sensors

Why they fail: Heat and age — a consumable part, and often the cheap fix behind a "dead" motor or compressor.
Symptoms: The unit cuts out early, blows room-temperature air, or short-cycles on and off.
Related Fault Codes: C4 (liquid-pipe / heat-exchanger thermistor) and H9 (outdoor air thermistor).

4. Running Capacitors

Why they fail: Moisture and resistance drift over time, feeding the board incorrect temperatures.
Symptoms: A fan or compressor that hums but won't start, intermittent operation, a swollen capacitor top.

5. Contactors & Electrical Parts

Why they fail: The contacts wear and burn with every cycle — and ants nesting across the contacts are a very common Australian cause of a no-start.
Symptoms: Outdoor unit dead, a chattering or buzzing sound, burnt contacts, the compressor won't start.

6. Compressors and Inverter Modules

Why they fail: Mechanical seize, oil slugging, or failure of the internal windings.
Symptoms: A loud buzzing sound but the unit won't start, or it repeatedly trips the switchboard breaker.
Related Fault Codes: E5 (inverter compressor lock or overheat) and J3 (discharge-pipe thermistor).

Tip: a fan that hums but won't start is often a capacitor, not the motor — see Capacitors.

Tip: a buzzing compressor that won't start is often a capacitor or contactor first — worth checking the cheaper parts before condemning the compressor.

Get your Daikin system back to peak performance

Browse our full range of genuine Daikin spare parts online.

Frequently Asked Questions

Daikin units display a two-character malfunction code on the controller or by a flashing light. The code points to the system that's faulting — for example U4 is a communication fault between the indoor and outdoor units, and E5 is an inverter-compressor fault. Read us the code and your model number and we'll help identify the likely part. Diagnosis and refrigerant work must be done by a licensed technician.

Not sure which part you need?

Our store search doesn't support model numbers, so the quickest way is to tell us your model. Send a photo of your Compliance Plate or give us your Daikin model number, and we'll confirm the right genuine part for your unit. Call 1300 904 554 or email daikin@nationalacparts.com.au.

ARC licence holder? Enter your promo code and licence number at checkout for your ARC discount on genuine Daikin spare parts.