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What is the warranty on electric motors and fan motors in transport refrigeration unit (TRU) systems?

Overview

Many customers want to know how long electric motors and fan motors used in transport refrigeration units are covered under warranty. Manufacturers do not publish a fixed warranty period for the compressor drive DC motor, however there is clear service guidance that determines when warranty applies. The information below explains how the warranty works and what you can expect in practice.

 

Electric Compressor Drive Motor (DC Motor)

Manufacturers do not provide a formal published warranty term for this specific type of motor. Instead, warranty coverage follows the recommended service schedule.

Service guidance states:

  • The motor must be serviced every 2,000 operating hours.

  • This service includes replacing the motor brushes.

  • After the second scheduled brush replacement, which takes place at around 4,000 operating hours, manufacturer warranty no longer applies.

It is important to note that this does not mean the motor is expected to fail at 4,000 hours. It simply marks the point at which warranty coverage ends once the scheduled maintenance has been completed.

 

Expected Life in Real Use

Although warranty ends after two brush changes, real world performance is usually much longer.

In typical fleet operation:

  • Motors often run for 8,000 to 12,000 hours when serviced correctly.

  • Good maintenance and controlled operating temperatures significantly extend the working life of the motor.

Customers can expect reliable service well beyond the warranty limit when maintenance is followed.

 

Fan Motors in TRU Systems

Manufacturers may provide indicative life guidance for condenser and evaporator fan motors, although many do not publish a fixed warranty term.

General expectations include:

  • A typical operational life starting from around 3,000 hours.

  • Actual life may vary depending on motor version, usage conditions and maintenance.

 

Conclusion

Carrier’s warranty for Neos electric motors is based on the service schedule rather than a set number of hours. Warranty ends after the second brush replacement at around 4,000 hours, although well maintained motors commonly last far longer. Fan motors have indicative life ranges but no fixed warranty period. With proper maintenance, customers can expect reliable long term performance from both motor types.