Maytag MEDB765FW W10240504 - Page 16

FOR SERVICE TECHNICIAN'S USE ONLY 6. Using figure 9 and the strip circuit on page 23, 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 MAIN 2.5-3.5 START 2.2-3.2 Contact Points of Measurement Disconnect lead from pin 5; check resistance between pin 5 and double copper wire flag terminal. Disconnect lead from pin 3; check resistance between pin 3 and double copper wire flag terminal.  If the resistance at the motor is correct, there is an open circuit between the motor and machine control electronics. Check for failed belt switch.  If the Start winding is in question and the resistance is much greater than 4 Ω, replace the motor. 7. Check the belt switch by measuring resistance between the two blue wires, as shown in figure 9 on page 15, while pushing up the belt switch pulley.  If the resistance reading goes from infinity to a few ohms as pulley arm closes the switch, belt switch is OK. If not, replace the belt switch.  If belt switch is OK and there is still an open circuit, check and repair the wiring harness. 8. Door switch problems can be uncovered by following procedure under TEST #7: Door Switch, page 22. Or, the following can be done without applying power to the dryer. Connect an ohmmeter across P8-3 (neutral,white wire) and P8-4 (door, tan wire).  With the door properly closed, the ohmmeter should indicate a closed circuit (0-2 Ω).  If not, replace the door switch assembly. 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 High limit thermostat Heat element assembly Gas valve assembly Centrifugal switch Outlet thermistor Machine control electronics Console electronics and housing assembly Gas supply Electric Dryer no ü ü ü ü Gas Dryer ü ü ü ü no ü ü ü ü ü no ü PAGE 16 DO NOT REMOVE OR DESTROY