Test  Error Codes (1) , (2) Mod Code Problem  Could be
  Belt replacement     from the back panel. Not from
ASKO        
Frigidaire Electrical   Gas Wiring      
GE stackable DSXH47EG1WW : test heater: Yl [motor block terminal]_ Bl [2 wire connector to MB]=11_15Ω
GE 3 stars screw Heater WH_orther color (opposite side) of a 4 terminal sensor [42Ω] connecting to High Limit T'stat,  under 37Ω=> bad. This model has heater with double coils [42Ω=21Ω*2]. cost $85 for heater. Move drum forward to get the drum out.
Fisher Paykel Top load dryer Run Not heating pry 2 small plastic knobs both side, release 4 screws, press reset red switch at bottom. Try, not working, continue check other elements
   
LG manual Not turn on but interior light: check T'stat fuse, door switch, ctrl board.
Maytag Performa Old   No power Thermo fuse closed to heater or Timer
   
KM new model Turning+not heat: T'stats, heater are OK=> Contrl board is bad
KM Stackable Wiring
Sears/Kenmore HE3_ F01 Error code Bad board: soldering between relay (bad pin) and K2 (good pin)
WP Duet Remove ctrl panel: release 4 screws in the back; Remove drum: release one side of cabinet
  Motor not working+Not heating+Counting down: fuse, Control board
WP electric Most new model Thermal fuse is wired in series with drive motor, wiring, Motor test FrontlintWiring, Motortest2, W10436308.pdf Analog Timer Timer WPW10185982
  Count down, not run=> fuse, contrl board, motor;
WP  F01 Error  
WP electric old model Not heat: check timer: BK_BU/BK_RD must be continuity, The last is dryness ctrl board (2 resistors look bad color 8558178)
WP electric Autodry not move: 240v inlet at dryer motor=>Tmer OK, Cycling T'stat bad or vice versa
Frigidaire gas  Sequences: Cạch rất lớn igniter turn on, Cạch gas on, cạch gas off
WP gas KenmoreEllit, Amiral   Not heating (1))Gas valve solenoids: 2 pin=[1kΩ_ 2kΩ]; 3 pin=> 1_3=[500_1kΩ]; 1_2[1.3KΩ]; (2) Flame sensor= 0Ω; igniter [60Ω]; 2 wire coming down=110V; Heater Relay on ctrl panel, Circuit Board, Timer, Thermal fuse ( is wired series with gas valve, wiring)
SS Electric Access: Top panel, pry and lift up out the display screen, remove two screws outside in lint filter, lift up the door out and lay on top.
SS Electric Not run, Power ok  : Thermostat on blower, motor safety switch, Control board,