If your Braemar evaporative air conditioner starts normally but then suddenly shuts down after running for a period of time, there is a good chance the motor is overheating.
Motor cut-out faults are one of the more common problems we see in older Braemar systems throughout Perth, particularly during the hotter months when the cooler is working hard.
While the issue can sometimes be electrical, the motor itself is often the source of the problem.
Fortunately, most motor faults can be diagnosed relatively quickly.
How A Braemar Fan Motor Works
The fan motor is responsible for driving the fan that pushes cooled air throughout your home.
Many Braemar evaporative coolers use horizontal-mounted AC motors.
As the motor operates, it naturally generates heat.
To protect itself from damage, the motor contains an internal thermal overload device.
This safety feature automatically switches the motor off if it becomes too hot.
Once the motor cools down, it may restart again.
This creates a cycle where:
• The cooler starts normally
• Airflow is present
• The motor overheats
• The motor shuts down
• The motor cools
• The system restarts
• The fault repeats
Internal Winding Failure
One of the most common causes of repeated motor cut-outs is an internal winding fault.
Electric motors contain copper windings that generate the magnetic fields needed for operation.
Over time these windings can deteriorate due to:
• Heat
• Age
• Moisture
• Vibration
• General wear and tear
When one winding becomes damaged or open circuit, the motor often draws excessive current and generates additional heat.
Eventually the thermal overload activates and shuts the motor down.
In most cases, replacement is the recommended solution.
Overheating Motors
Not every overheating motor has a complete winding failure.
Some motors simply become less efficient as they age.
Symptoms may include:
• Reduced airflow
• Excessive motor temperature
• Burning smells
• Intermittent operation
• Random shutdowns
These signs often indicate the motor is nearing the end of its service life.
Capacitor Problems
Many AC motors rely on capacitors to assist with starting and running.
When a capacitor begins to fail, the motor may:
• Struggle to start
• Run inefficiently
• Draw excessive current
• Overheat
In some situations, replacing the capacitor can restore normal operation without replacing the entire motor.
A technician can determine whether the motor or capacitor is at fault.
Electrical Faults
Although motor failure is common, electrical faults can also cause cut-out issues.
Potential causes include:
• Loose wiring
• Damaged connections
• Faulty relays
• Controller faults
• Voltage supply problems
Electrical testing is usually required to eliminate these possibilities.
Dirty Filter Pads And Airflow Restrictions
Restricted airflow can place additional stress on a motor.
Common causes include:
• Dirty filter pads
• Debris inside the unit
• Poor maintenance
• Fan-related issues
While airflow restrictions may not directly cause a motor failure, they can contribute to overheating and reduced motor lifespan.
Can A New Motor Fail?
Occasionally, yes.
Modern replacement motors are generally reliable, but manufacturing defects can occasionally occur.
If a replacement motor develops a fault, it will usually show symptoms early in its life.
At Air Legends, replacement motors supplied by us are covered under manufacturer warranty conditions.
If a rare defective motor occurs, we will assist with the warranty process.
Could Insurance Cover Motor Failure?
In some situations, motor failure may be covered under home insurance policies that include:
• Electrical fusion cover
• Motor burnout cover
• Electrical damage cover
Coverage varies between insurers and policies.
If required, Air Legends can provide a written report outlining:
• The motor fault
• Cause of failure
• Test results
• Recommended repairs
This information may assist with an insurance claim.
Signs Your Braemar Motor May Need Replacing
You should arrange an inspection if you notice:
• Motor cutting out repeatedly
• Weak airflow
• Burning smells
• Excessive motor heat
• Intermittent operation
• Fan stopping unexpectedly
Addressing these symptoms early may prevent complete failure during summer.
Book A Braemar Motor Inspection In Perth
If your Braemar evaporative air conditioner motor keeps cutting out, Air Legends can inspect the system and determine the cause.
We service and repair Braemar evaporative cooling systems throughout Perth and can diagnose motor faults, capacitor issues, electrical problems and airflow-related concerns.
Contact Air Legends today to arrange a professional Braemar inspection.