Aircon Parts Reference
When a quote names a part, look it up here. Each page covers what it does, the symptoms that match, and the evidence that should back a replacement.
Where to start
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Find the quoted part
Search by part name, symptom or test result.
indoor unit parts10 pages
- What is an aircon indoor PCB, and why cooling never starts?
- What is an aircon indoor fan motor, and why airflow drops?
- What is an aircon blower wheel, and can cleaning fix it?
- What is an aircon evaporator coil, and is it dirt or gas?
- What is an aircon filter, and when it weakens cooling?
- What is an aircon IR receiver, and how to test the remote?
- What is an aircon louvre swing motor, and what stalls it?
- Indoor thermistor or blocked airflow: same cut-off
- What is an aircon display board, and what to check first?
- What is aircon indoor insulation foam, and why water drips?
outdoor unit parts15 pages
- What is an aircon outdoor PCB, or is the compressor dead?
- What is an aircon outdoor fan motor, and why check it last?
- What is an aircon outdoor fan blade, and when to replace it?
- What is an aircon compressor, and should you replace it?
- What is an aircon start capacitor, and why won't it spin?
- What is an aircon run capacitor, and why does cooling fade?
- What is an aircon dual run capacitor, and what it powers?
- What is an aircon overload protector, and what trips it?
- What is an aircon condenser coil, and can cleaning fix it?
- Outdoor thermistor or a dirty coil: is the heat real?
- What are aircon contactors and relays, and why the clicking?
- What is an aircon pressure sensor, or is refrigerant low?
- What is an aircon IPM, and why is the cooling unstable?
- What is an aircon anti-vibration pad, and is it worn out?
- What is an aircon outdoor unit bracket, and why walls hum?
refrigerant & piping parts11 pages
- What is aircon refrigerant, and does it get used up?
- What are aircon copper pipes, and where do leaks hide?
- What is an aircon flare joint, and how do leaks show up?
- What is an aircon service valve, and how leaks show up?
- What is an aircon expansion valve, and how is it tested?
- What is an aircon four-way valve, and which units have it?
- What is an aircon pressure switch, and why did it cut out?
- What is an aircon capillary tube, and why does it block?
- What is aircon pipe insulation, and why do pipes drip?
- What is an aircon liquid line, and should it ever sweat?
- What is an aircon suction line, and what does frost mean?
drainage parts5 pages
electrical & control parts6 pages
- What is an aircon remote control, and is it the receiver?
- What is an aircon wired controller, and has yours failed?
- What is an aircon isolator switch, and is it cutting power?
- What is an aircon terminal block and wiring connection?
- What is an aircon interconnect wire, and where does it fail?
- Aircon current sensor: what its fault code means
Before approving a part replacement
Ask what test showed the part had failed
Ask for the reading, measurement or visible damage that supports the diagnosis.
Confirm the replacement part number
Check that it matches your exact aircon model. Ask whether the part is new or refurbished.
Get the full price and warranty in writing
Check what is included in the quoted total and what the parts and labour warranties cover.
Need help with a part on your quote?
Send the quote, your aircon model and what the unit is doing. We’ll explain what to clarify before you approve the work.