If a split phase burner motor does not operate and the voltage to the motor is correct, what should be checked first?

When a split phase burner motor fails to operate despite the voltage supply being correct, the first component to check is indeed the overload switch. This is because the overload switch acts as a safety device, designed to protect the motor from overheating and potential damage due to excessive current. If the load exceeds the motor's capacity, or if there is a fault condition, the overload switch will trip, cutting power to the motor to prevent further issues.

Verifying the status of the overload switch is crucial, as it may have tripped and thus disabled the motor from running. If this switch has not reset, it is essential to investigate why this occurred. Checking this component first allows for an efficient troubleshooting process because if it has tripped, neither the capacitor nor the start switch will come into play until the overload switch is reset or replaced.

In contrast, examining the main power supply, the capacitor, or the start switch can be part of troubleshooting later but ensuring the protection mechanisms like the overload switch are intact is a priority.