Test Check Problem  Could be
    Not heat Magnetron, Trsformer, Capacitor, Diode
GE Gas Igniter Bake or Broil not working Test for resistance
  WB2X9154 Igniter=150Ω; Valve (WB19K13) = 1.5Ω  
Microwave Not spinning Check the motor for continuity. If it's open then the motor is bad. Wrong voltage at the motor means a faulty control board.
  Not Heating 1.Diot:  A regular meter with a diode checker will not work to check these diodes. You have to use a meter with a 9 volt battery or put a 9 volt battery in series with the diode to check it
2. Door switches: Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat
3.Magnegtron: If the microwave oven doesn't heat the magnetron tube might have burned out
4.Capacitor: If the microwave doesn't heat the high voltage capacitor might be defective.
5. Transformer: When a high voltage transformer fails it will usually arch and have a burning smell.
6. Thermal fuse: If the microwave doesn't heat the thermal fuse may have blown
GE Microwave Oven built-in   Door sw [27DCV], heater[5DCV, 3320Ω]; Ssor [4.4 DCV,10100Ω]; Relay [120ACV]
WP Gas Oven not wk Test gas valve: 1_2(Broil)=3_2(Bake)= 216 Ω (+-30). If one fail, neither one works. If igniter works, not gas => bad igniter
KitchenAid Gas   Gas valve 9755424 (1_1.6Ω) often strong and continuity with igniter (Ω). Not burning most problems are igniters
WP Accubake F3E2 Not working burner and oven CCU or T sensor [1k_2kΩ]
KM glass top (warm) Bake = 17Ω, Broil=14Ω, T sensor=1070Ω
GE wall microwave Plate motor: two small same color wires coming from back. one enters MB, one comes to Magnetron motor. Magnetron and Transformer (Primary/Secondary) R=0Ω;
GE Pacemaker (Mod JVM152K003) Clip Lock outward is determine wire position. All BK bigger wires= 110V; 2 inlet pwer pins [∞Ω, 25Ω out]; 2 inlet Matn pins WH [Ω]. CON A | 1  2  3  4  5 | {3_4 onboard=5Ω , 1_5 out=80Ω, 1_4 out=250Ω; CON D | 1  2  3  4  5 | {2_5 onboard= 3Ω; 1(BK)_4(RD) upward to flame ssor=0Ω}; CON C1 | 1  2  3  4 | {3_4 onboard= 3Ω; Ctrl C2}; CON C2 (small trsformer, Rd_Rd [Ω onboard]=12.5 DCV, Yl_Yl [6Ω onboard]=2.4 DCV| 1  2  3  4 | {3_4 onboard= 8Ω; Fan works when plug in board}; CON B2 (T'stat =0Ω) {0Ω and 110 V out}_ Capacitor [20kΩ]; Trsformer CON B1 =90Ω [0Ω onboard, input 110V, output 1600V]; Managtron [0Ω]. | Wh  Bl   Yl   Rd | in a bundle upward is for vent motor and all connects each other=0Ω; 2 Wh/Bl (parachute strg like to fuse and MATN) upward is Flame ssor (0Ω); T'cut out (3 wires to CON A)= Ω;
GE Profile Ctrl pnel lit, not chose Ctrl panel problem