Maytag MED5800TW Technical Education - Page 72

• If open, replace the high limit thermostat. • If closed, apply heat. It should open at about 250°F (121°C). Otherwise, replace the high limit thermostat. Thermal Fuse Thermal Cut-Off Thermistor High Limit Thermostat Heat Element Thermal Components-Electric Thermal Fuse High Limit Thermostat Thermal Cut-Off Thermistor Thermal Components-Gas Thermal Cut-Off Test This unit is equipped with a "one-shot" thermal cut-off. See Thermal Components illustrations. If the dryer does not heat with power supplied: 1. Unplug dryer or disconnect power. 2. Check the thermal cut-off for continuity. • If open, thermal cut-off has failed and must be replaced. NOTE: If the thermal cut-off has failed, replace the thermal cut-off and high limit thermostat. In addition, check for failed heat system, or blocked or improper exhaust system. Thermal Fuse Test-Electric A thermal fuse is used on this model. The thermal fuse is wired in series with the dryer drive motor. If the thermal fuse opens, power is shut off to the motor. 1. Unplug dryer or disconnect power. 2. Check continuity of thermal fuse. 3. Once the thermal fuse has opened, it must be replaced. Check for failed thermistor, shorted heat element, or other causes of failure. Replace failed parts. See Thermal Components illustration. Thermal Fuse Test-Gas A thermal fuse is used on this model. The thermal fuse is wired in series with the dryer gas valve. If the thermal fuse opens, power is shut off to the motor. (Centrifugal switch in gas valve also opens heater circuit.) 1. Unplug dryer or disconnect power. 2. Check continuity of thermal fuse. 3. Once the thermal fuse has opened, it must be replaced. Check for failed thermistor or other causes of failure. Replace failed parts. See Thermal Components illustration. 6-6