Whirlpool Thin Twin - Manual (Page 22)

SECTION THREE
TROUBLESHOOTING and DIAGNOSIS
DRYER TROUBLESHOOTING GUIDE
CONDITION POSSIBLE CAUSE
Dryer will not run. No power to unit.
Door switch not making.
Thermal fuse open.
Broken belt or belt switch.
Timer
Motor
Push-to-start switch
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 con­
tinuity, (2-4 ohms).
Check PTS contacts NO to CO, while
pushing start switch.
No heat in dryer. Improper voltage supply. Check for 240VAC. (electric dryer)
Heater Element Check heater continuity, (8-12 ohms).
Gas Burner Check for voltage (120VAC) to burner as­
sembly.
Check ignitor continuity.
Check for gas supply.
Check flame switch continuity, (0 ohms
when cold).
Check gas valve solenoids for continuity.
Thermostat Check thermostat for continuity.
Thermal cut-off, Hi-limit
Thermostat Check for continuity.
Motor centrifugal switch Manually dose centrifugal switch contacts,
check for continuity, (1M-2M ohms).
Drum will not rotate. Broken belt Check belt.
Broken belt switch Check for continuity.
Idler pulley binding. Check for proper operation of idler pulley.
Not heating enough. Blocked airflow Check lint filter, blower housing, internal
and external ducting and exhaust hood.
Thermostat cycling too low. Check exhaust temperatures for proper
cycling.
Temperature too hot. Thermostat heater open Check heater for continuity, (3200-4000
ohms).
Check selector and wiring for continuity.
Auto cycle timer won’t Timer Check timer motor continuity, (4000-6000
advance. ohms).
Resistor Check resistor for 4000 to 5000 ohms.
Timer contact TM to OR Check for continuity.
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