Whirlpool 27' Arbeitshilfe - Seite 28

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Whirlpool 27' Arbeitshilfe

TROUBLESHOOTING and DIAGNOSIS

CONDITION
Dryer will not run.
No heat in dryer.
Drum will not rotate.
Not heating enough.
Temperature too hot.
Auto cycle timer won't
advance.

SECTION FOUR

TROUBLESHOOTING GUIDE

POSSIBLE CAUSE
No power to unit.
Door switch not making.
Thermal fuse open.
Broken belt or belt switch.
Timer
Motor
Push-to-start relay
Improper voltage supply.
Heater Element
Gas Burner
Thermostat
Thermal cut-off, Hi-limit
thermostat
Motor centrifugal switch
Broken belt
Broken belt switch
Idler pulley binding.
Blocked air flow
Thermostat cycling too low.
Thermostat heater open
Timer
Electronic control
Dryness sensor
Check voltage supply.
Check door switch siring and continuity.
Check fuse continuity.
Check for broken belt or check belt switch
for continuity.
Check timer contacts for continuity.
Check voltage to motor, contacts 4 & 5,
(120VAC). Check motor windings for
continuity, (2-4 ohms).
Check PTS contacts R1 - R2, while
pushing start switch. Check PTS relay coil
R2 - CT1 for continuity.
Check for 240VAC. (electric dryer)
Check heater continuity, (8-12 ohms).
Check for voltage (120VAC) to burner
assembly.
Check ignitor continuity.
Check for gas supply.
Check flame switch continuity, (0 ohms
when cold).
Check gas valves for continuity.
Check thermostat for continuity.
Check for continuity.
Manually close centrifugal switch contacts,
check for continuity, (1M-2M ohms).
Check belt.
Check for continuity.
Check for proper operation of idler pulley.
Check lint filter, blower housing, internal
and external ducting and exhaust hood.
Check exhaust temperatures for proper
cycling.
Check heater for continuity, (3200-4000
ohms).
Check selector and wiring for continuity.
Check timer motor continuity, (4000-6000
ohms).
See checkout procedure.
See checkout procedure.
23
SOLUTION