Every year across Perth, homeowners switch on their evaporative air conditioners after months of inactivity and discover something isn’t working as expected.
Winter can be surprisingly hard on evaporative cooling systems.
During the cooler months, units sit unused while dust, debris, insects and mineral deposits continue to accumulate inside the system.
At Air Legends, we perform hundreds of summer startup services and often find the same faults appearing year after year.
Here are some of the most common problems discovered during preseason evaporative cooler inspections.
Dirty Reservoirs Full Of Sludge
One of the most common issues is sludge accumulation inside the reservoir.
Over time, the base of the cooler can collect:
• Dirt
• Dust
• Mineral deposits
• Organic material
• Insects
• General debris
Without regular cleaning, this buildup affects water quality and can contribute to cooling problems, unpleasant smells and component wear.
A thorough cleanout is often one of the most important parts of a summer startup service.
Wasp Nests
Wasp nests are extremely common inside evaporative coolers that have been inactive throughout winter.
Wasps are attracted to sheltered spaces and often build nests inside:
• Reservoir areas
• Fan sections
• Around water components
• Internal cavities
These nests can restrict airflow and create safety concerns during servicing.
It’s surprising how often wasp nests are discovered during the first inspection of the season.
Worn Filter Pads
Filter pads are responsible for the cooling process.
When inspected at the start of summer, we frequently find pads that are:
• Blocked with scale
• Contaminated with dirt
• Damaged
• Restricting airflow
• Past their useful lifespan
Poor filter pad condition often results in:
• Reduced cooling
• Increased humidity
• Poor airflow
• Higher operating costs
Replacement pads can dramatically improve performance in many systems.
Water Pump Failures
The water pump circulates water through the filter pads.
If the pump has failed, the cooler may:
• Blow warm air
• Have dry filter pads
• Appear to run normally but not cool
Pump failures are one of the most common reasons a cooler suddenly stops cooling at the start of summer.
Fortunately, they can often be diagnosed quickly.
Fan Motor Problems
Motor issues are another common discovery during startup inspections.
Signs include:
• Weak airflow
• No airflow
• Intermittent operation
• Motor overheating
• Motor cut-outs
Many homeowners don’t realise a motor is deteriorating until they need the cooler during hot weather.
Identifying these problems early helps avoid breakdowns during the middle of summer.
Drain Valve Faults
Many modern evaporative coolers use automatic drain systems.
These systems help maintain water quality by periodically flushing the reservoir.
Problems can occur when:
• Drain valves become stuck
• Components fail
• Debris blocks operation
Faulty drain systems can contribute to poor water quality, increased scale buildup and reduced cooling efficiency.
Water Leaks
Water leaks are frequently identified during startup services.
Common causes include:
• Faulty float valves
• Blocked drains
• Damaged filter pads
• Overflow conditions
• Water distribution faults
Finding leaks early can help prevent costly ceiling or roof-space damage later.
Water Quality Issues
Many evaporative coolers contain water management systems designed to reduce scale buildup.
If these systems are not functioning correctly, technicians may find:
• Excessive mineral deposits
• Scale accumulation
• Contaminated water
• Reduced cooling performance
Correct drain settings and salinity settings play an important role in maintaining water quality.
Electrical Faults
Electrical issues are sometimes discovered when systems are restarted after months of inactivity.
Examples include:
• Faulty controllers
• Failed relays
• Wiring faults
• Damaged electrical components
While less common than maintenance-related issues, electrical faults can prevent a cooler from operating altogether.
Why Startup Services Save Money
Many of the faults listed above begin as relatively minor issues.
Identifying them before summer helps:
• Reduce repair costs
• Prevent breakdowns
• Improve cooling performance
• Extend system life
• Increase reliability
Preventative maintenance is often significantly cheaper than emergency repairs during a heatwave.
What We Check During A Startup Service
At Air Legends, a typical summer startup inspection includes:
• Reservoir cleaning
• Drain flushing
• Filter pad inspection
• Pump testing
• Motor testing
• Water system checks
• General condition assessment
This helps ensure your evaporative cooler is ready for Perth’s hottest months.
Book A Summer Startup Service In Perth
If your evaporative cooler has been sitting idle throughout winter, now is the ideal time to have it inspected.
Air Legends services all major evaporative cooling brands throughout Perth and can identify potential problems before they become expensive summer breakdowns.
Contact Air Legends today to book your summer startup service.