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©2003 Maytag Appliances Company 16022785 Rev. 0 11
Troubleshooting Procedures
! WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing
requires power.
Troubleshooting Guide
Maytag Neptune™ Drying Center
•
Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or
repair of this unit.
Will Not Run
Will not start or run:
• All wires are hooked up to their corresponding
terminals.
• Dryer is plugged in.
• Blown fuse or circuit breaker.
• Door switch functional...door closed.
• Poor connection between membrane switch and logic
board, or faulty membrane switch. Use "
Pd
" utility to
check function of membrane switch.
• Faulty motor relay, use diagnostic utilities to manually
operate relay.
• Drive motor functional.
• Blown thermal fuse.
Motor runs/ tumbler will not turn:
• Belt off or broken/damaged.
• Idler tension spring too weak or stretched.
• Idler pulley jammed or stuck.
Runs a few minutes and then stops:
• Lint buildup around drive motor.
• Low voltage present.
• Blower impeller blocked in blower
housing.
• Drive motor - start switch contacts stuck closed.
Blows fuses or trips circuit breaker:
Electric Models
• The amperage readings are at 240 volts. One line with
24 amps, and the other line with 21 amps. The neutral
line will be at 3 amps. If the above amperages are
present, then the house wiring, fuse box or circuit
breaker should be suspected.
• Shorted heating element to housing.
• Incorrect wiring or a wire shorting to ground.
• Drive motor winding shorting to ground.
Gas Models
• During ignition the dryer will draw 7 amps. With the
burner ON, the dryer will draw 3 amps. If the dryer is
drawing amperages above this, then the house wiring,
fuse box or circuit breaker is suspected to be at fault.
• Igniter harness loose and shorted to base.
• Incorrect wiring or wire shorted to ground.
• Open centrifugal switch in motor
• Drive motor winding shorting to ground.
Will Not Dry
Will not heat (motor runs):
• Open heating element.
• Hi-Limit trips easily or is open.
• Faulty Thermistor.
• Faulty Heater Relays.
• Drive motor centrifugal start switch not allowing
voltage to gas valve or heating element.
Will Not Dry (Gas Models)
Poor Gas Ignition
When the dryer is operated on a heat setting, the igniter
should be energized and burner shall fire within 45
seconds at 120 VAC. The failure of a component in this
system will usually be indicated by one of three
symptoms:
The igniter does not glow.
If the igniter does not heat
up, remove power and using an ohmmeter, check the
following:
• Open flame sensor
• Open igniter
• Shorted booster coil
• Open wiring
Igniter glows - No gas ignition.
If the igniter heats up
but the main burner flame is not ignited, remove power
and using an ohmmeter, check the following:
• Open secondary coil
• Open holding coil
• Open wire harness
The gas is ignited but the flame goes out.
If a normal
ignition takes place and after a short while the flame goes
out, check for the following:
• Radiant sensor contacts opening
prematurely.
• Weak gas valve coil may open when
stressed by higher temperatures.
Improper drying/clothes wrinkled/ rough texture/long
dry time:
• Lint filter is not clean.
• Restriction in exhaust.
• Outside exhaust hood damper door stuck closed.
• Exhaust too long, too many elbows, flex ductwork
installed.
•
Poor makeup air available for the dryer.
•
Incorrect tumbler speed. Tumbler belt slipping.
• Blower impeller bound; check for foreign material in
blower area.
• Customer overloading dryer.
• Check clothing labels for fabric content and cycle
selected.
• Gas valve coil opens - weak point in coil opens when
stressed under heated conditions.