MED5920TW0 | Whirlpool Dryer Manual

Summary

The service manual for the Whirlpool Maytag MED5920TW0 electric dryer provides comprehensive diagnostic and troubleshooting procedures for service technicians. A critical tool is the Diagnostic Test Mode, which enables verification of all inputs to the control system. By setting specific configurations, such as the temperature switch to “Air Fluff” and repeatedly toggling the wrinkle-prevent switch, the technician can enter test mode. Each change in input state—whether it’s the door switch, moisture sensor, or temperature setting—results in an audible beep. If any expected beep is missing, it directs the technician to specific component tests such as the door switch, moisture sensor, or timer.

A significant portion of the troubleshooting focuses on thermal regulation and heating issues. The Thermal Fuse Test and Thermal Cut-Off Test are essential for diagnosing when the dryer will not heat. The thermal fuse is in series with the motor, and its failure cuts power to the entire dryer. Similarly, the thermal cut-off and high-limit thermostat are key safety components; if either fails, the dryer will not heat properly. Replacing these parts may be necessary along with checking for blockages in the exhaust vent. Additionally, the heater element resistance check should yield a result of about 20 ohms, and any failure in this range indicates the need to replace the heating element.

For operational issues like the dryer failing to start, the guide recommends testing the Push to Start (PTS) switch, motor relay, and door switch for continuity. The motor centrifugal switch should be tested for its open and closed conditions, as a malfunction here could prevent the dryer from running or shutting off. When addressing issues like the dryer shutting off prematurely or failing to advance through cycles, technicians are directed to test the moisture sensor and thermistor, which regulate dryness detection and temperature control, respectively. Proper wiring connections and resistance values in these components are essential to maintaining dryer functionality.