DIAGNOSTICS & TROUBLESHOOTING
Whirlpool Compact Heat Pump Dryer
n
2-9
For Service Technician Use Only
Problem
Possible Causes
Checks & Tests
WILL NOT HEAT
Check installation.
Verify proper dryer installation.
Check for L1 and L2.
See TEST #2: Supply Connections, page 13.
Heater system malfunction.
See TEST #4: Heat System, page 14.
NTC thermistor problem.
See TEST #4c: Thermistors, page 17.
ACU problem.
See TEST #1: ACU Power Check, page 12.
HEATS IN AIR CYCLE
Heater coil shorted.
See TEST #4: Heat System, page 14.
Heater relay shorted.
See TEST #4: Heat System, page 14.
Heater system problem.
See TEST #4: Heat System, page 14.
NTC thermistor problem.
See TEST #4c: Thermistors, page 17.
SHUTS OFF BEFORE
CLOTHES ARE DRY
Lint filters are full/plugged.
Clean if necessary. Refer customer to Use & Care Guide.
Dryness setting for auto cycles.
Increase dryness level setting for one or more auto cycles, along
with conductivity (Customer-Focused Dryness Level) setting
(see TEST #5a).
Moisture sensor problem.
See TEST #5: Moisture Sensor, page 18.
NTC thermistor problem.
See TEST #4c: Thermistors, page 17.
Unusual Noise
THUMPING NOISE
Dryer hasn’t been used in a while.
This is due to temporary flat spots on the drum rollers. The
thumping sound will diminish after a few minutes.
RATTLING OR
VIBRATING NOISE
A small object caught between the
edges of dryer drum.
Check the front and rear edges of the drum for small objects.
Clean out pockets before laundering.
Dryer isn’t properly leveled.
The dryer may vibrate if not properly installed. See “Installation
Instructions.” All four dryer feet should be in firm contact with
the floor.
Clothing is balled up in dryer.
When balled up, the load will bounce, causing the dryer to
vibrate. Separate the load items and restart the dryer.
LOUD HUMMING OR
INCREASED NOISE
DURING CYCLE
Load is packed tightly.
Reduce load size to recommended load size in “Program/Cycle
Guide.” Run the dryer for 5–10 minutes.
Dryer Results
CLOTHES ARE
NOT DRYING
SATISFACTORILY OR
DRYING TIMES ARE
TOO LONG
Lint screen is clogged with lint.
Clean lint screen before each load.
Bottom filter and screen is clogged
with lint.
Clean bottom filter after every 5th cycle.
Clothes not contacting the moisture
sensors during Automatic Cycles.
Check that the dryer is level.
The load is too large and heavy to
dry quickly.
Separate the load to tumble freely
Fabric softener sheets are blocking
the grille.
The air outlet grille is just inside the door. Check that it is not
blocked by a fabric softener sheet.
Use only one fabric softener sheet, and use it only once.
The dryer is located in a room with
temperature below 45ºF (7ºC).
Proper operation of dryer cycles requires temperatures above
5ºF (7ºC).
The dryer is located in a closet.
Closet doors must have ventilation openings at the top and
bottom of the door. The front of the dryer requires a minimum
of 1” (25 mm) of airspace, and, for most installations, the rear
of the dryer requires 5” (127 mm).
Troubleshooting Guide (continued)
Continued on following page . . .