Maytag Microwave Error Code CALL SErv

CALL SErv means the amperage monitoring system on the High Voltage Board has detected a fault in the high voltage circuit. This is the circuit responsible for powering the magnetron, which generates microwave cooking energy. The code can also appear after a power interruption occurs while the oven is running. In that case, it may clear with a simple reset through the Service Test procedure.

You should not attempt to continue using the microwave while this code is active, as it indicates a detected fault in the high voltage system. The high voltage circuit in a microwave operates at potentially lethal voltage and current levels. Do not attempt to inspect or service internal components without proper training and equipment, and always discharge the H.V. capacitor before handling any internal parts.

If the issue is only a power-related false trigger, there is no parts cost and only a service call fee if a technician performs the reset. If a component has failed, repair costs vary depending on which part is at fault. H.V. diode and capacitor replacements are generally on the lower end of the cost range, while magnetron or H.V. Board replacements can range from roughly $150 to $350 or more depending on the model and labor rates in your area.

The reset is performed using the Service Test procedure via pad 0 on the microwave's control panel. After resetting, place a water load in the cavity and run the oven for at least 30 seconds to see if the code returns. If it does not return, the issue was likely caused by a power interruption and no further action is needed. If the code reappears, further diagnosis of the high voltage components is required and a qualified technician should be involved due to the dangerous voltages present.

The code does not clear automatically. It requires an active reset through the Service Test procedure using pad 0 on the control panel. Once reset, running the oven with a water load for 30 or more seconds will confirm whether the code was triggered by the power interruption or by an actual component fault.