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Matyag MED5900TW1 | Whirlpool Dryer Manual

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Summary

MED5900TW1 Whirlpool Matyag Dryer Front ViewThe service manual for the Whirlpool Maytag dryer MED5900TW1 provides comprehensive diagnostic guides and troubleshooting procedures for appliance technicians. Key diagnostic steps include activating the diagnostic test mode, which requires setting specific configurations: the door must be open, the temperature switch set to “Air Fluff,” the end-of-cycle signal switch to “Louder,” and the timer to “Timed Drying” or “Sensor Drying.” The Wrinkle Prevent switch is then toggled from “Off” to “On” three times within five seconds to enter the test mode. In this mode, any input change, such as the door switch or moisture sensor state, results in an audible beep. If a beep does not occur, the corresponding component tests should be performed to identify and rectify faults.

The tech sheet outlines several critical error codes and their implications. For instance, if the dryer will not run, possible issues could involve the supply connections, motor relay, push-to-start switch, thermal fuse, or door switch. If the dryer does not heat, troubleshooting should focus on components like the heater relay, thermal cut-off, high-limit thermostat, and thermistor. Error conditions such as heating during the “Air Fluff” cycle or the dryer shutting off before clothes are dry can indicate failures in components such as the heater relay, temperature switch, moisture sensor, or electronic control assembly. Technicians are guided through specific tests, such as continuity checks for the heater elements and motor centrifugal switch, ensuring each component’s functionality.

The document also provides detailed tables of thermistor resistance values at various temperatures, which are crucial for verifying the operational integrity of the thermistor and maintaining accurate temperature regulation in the dryer. These guidelines ensure thorough and precise troubleshooting and repair processes.

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