Maytag MEDB835DC W10240504 - Page 16

FOR SERVICE TECHNICIAN'S USE ONLY 10. Using figure 9a and the strip circuit on page 24, check for the resistance values of the motor's Main and Start winding coils as shown in the following table. NOTE: Main and Start winding coils must be checked at the motor. Winding Resistance in ohms Contact Points of Measurement MAIN 3.3-3.6 Blue wire in back at pin 4 and bare copper wire terminal removed from pin 5 of black drive motor switch START 2.7-3.0 Blue wire in back at pin 4 and bare copper wire terminal on pin 3 of black drive motor switch  If the resistance at the motor is correct, there is an open circuit between the motor and ACU. For gas models, check for a belt switch problem; see step 11. For electric models, check and repair the main wiring harness.  If the Main or Start winding resistance is much greater or less than the values listed in the table above, replace the motor. 11. On gas dryer only, check the belt switch by unplugging the connector and measuring the resistance between pins 1 and 3 of the belt switch connector while pushing up the pulley (see figure 9b). connectors are keyed to facilitate correct connection, and are black on black for the run capacitor and light green and gray for the start capacitor. Contact both leads to check inductance of capacitors. Start capacitor inductance should be 189-227 µF; run capacitor inductance should be 22.3-24.7 µF. Proper torque is 9-12 Nm for each. Figure 9c - Motor capacitors. 13. Reassemble all parts and panels. 14. Plug in dryer or reconnect power. 15. Perform steps under "Service Test Mode", page 6, to verify repair. Pulley Belt Switch Figure 9b - Checking the belt switch (gas only).  If the resistance reading goes from open to a few ohms as pulley arm closes the switch, belt switch is good. If not, replace the belt switch.  If belt switch is good and there is still an open circuit, check and repair the main wiring harness. 12. If the motor has two capacitors attached as shown in figure 9c, perform the following. Otherwise, skip to step 13. Remove and check motor capacitors: each capacitor can be removed by disconnecting the capacitor connector and removing the nut on the capacitor end (see figure 9c). The capacitor 26 4 3 5 1 TEST #4: Heat System This test is performed when either of the following situations occurs: 3 Dryer does not heat 3 Heat will not shut off This test checks the components making up the heating circuit. The following items are part of this system: Part of Heating System Harness/connection Heater relay Thermal cut-off Electric Gas Dryer Dryer Thermal fuse no High limit thermostat Heat element assembly Gas valve assembly Centrifugal switch Outlet thermistor Inlet thermistor no no Machine control electronics Console electronics and housing assembly Gas supply no PAGE 16 DO NOT REMOVE OR DESTROY