Evaporative Cooling FAQs

At Harley Plumbing, we help homeowners across Melbourne get the most out of their evaporative cooling systems. Whether your unit isn’t performing like it used to or you’re unsure what a fault code means, our experienced technicians are here to help.

Below are some of the most common evaporative cooling questions we receive, along with practical advice to keep your system running efficiently.

Q: My evaporative cooler has stopped working. Do I need a new thermostat?

A: Not necessarily. While many people assume the thermostat is at fault, the issue is often related to the unit’s internal electronics, such as the control board or wiring connections. A professional inspection is the best way to determine the real cause before replacing any components unnecessarily.

Q: My evaporative cooling unit is making unusual noises. What could it be?

A: Rattling, grinding, or banging sounds usually indicate wear and tear. Over time, fan blades, motors, or other internal parts can become loose or unbalanced. It’s important to have the unit checked promptly to prevent further damage and avoid costly repairs.

Q: The air doesn’t feel as cool as it used to. Why?

A: Reduced cooling performance is often linked to worn cooling pads, mineral build-up, blocked water lines, or poor water circulation. When the pads aren’t properly saturated, the system can blow warm or room-temperature air. Regular servicing before summer helps maintain optimal performance.

Q: There’s no airflow coming from my ceiling vents.

A: If your evaporative cooler is running but no air is coming through the vents, the issue may lie within the ducting. Disconnected, crushed, or leaking ducts can prevent air from reaching certain areas of your home. A technician can inspect and repair the ductwork if needed.

Q: My thermostat says 22°C, but the house feels much warmer.

A: Temperature discrepancies can be caused by duct leaks, poor insulation, or airflow restrictions. It’s also possible that the thermostat sensor isn’t accurately reading the room temperature. A system check can identify the source of the problem.

Q: My evaporative cooler is very loud when running.

A: Excessive noise may be due to motor issues, worn bearings, loose components, or fan imbalance. In some cases, the unit may need rebalancing or part replacement. Addressing the noise early can extend the life of your system.

Q: The controller screen is blank. What should I do?

A: First, check whether the controller uses batteries and replace them if required. If it’s hardwired, there may be an issue with the power supply or connecting cables. Try turning the system off and on at the mains. If the screen remains blank, professional diagnosis is recommended.

Q: I’ve noticed water leaking from the evaporative cooler. Is that serious?

A: Water dripping from the unit can indicate a blocked drain, cracked tray, float valve issue, or internal component fault. While some causes are minor, leaks should be addressed quickly to prevent water damage and system failure.

Q: Are ceiling vents for heating and cooling connected to my evaporative system?

A: If your ceiling vents provide both heating and cooling, you likely have a ducted heating system paired with an add-on cooling system or a ducted refrigerated unit. Evaporative cooling systems typically operate independently from gas ducted heating.

Q: There’s a fault code on my controller. What does it mean?

A: Error codes usually indicate that the system requires servicing, cleaning, or has detected a mechanical or electrical fault. You can try resetting the system at the mains. If the fault remains, a qualified technician should inspect the unit.

Q: The system starts normally, but no air is coming through.

A: This commonly points to a ducting problem or fan issue. A professional inspection will determine whether airflow is being blocked or redirected somewhere in the system.

Q: Can I purchase a replacement evaporative cooler controller?

A: While we don’t specialise in retailing spare parts, we can help you identify the correct controller for your system. Simply provide the brand and model details, and we’ll guide you in the right direction.

Need Evaporative Cooling Service in Melbourne?

Regular servicing improves efficiency, reduces breakdowns, and extends the life of your evaporative cooling system. If your unit isn’t performing as it should, Harley Plumbing Melbourne can provide expert diagnosis, repairs, and maintenance across Melbourne.

If you’re unsure what’s wrong with your system, contact our team today – we’re happy to help keep your home cool and comfortable.