Whirlpool AD25BSS, Manual

5-2

PROBLEM

CAUSE

CORRECTION

Unit will not run - no fan        
and no compressor.

1.   Unit not turned “ON” or not set dry 

enough.

1.   Set control to “CONTINUOUS.” This will allow the fan and com-

pressor to run regardless of the ambient humidity.

2.   No power to unit.

2a. Power supply cord not plugged in. Plug in cord. 
2b. Unit plugged into outlet that has no power to it (blown fuse or 

tripped circuit breaker). Advise customer to correct this problem 
with a qualified electrician.

3.   Bucket In/Water Level switch open.

3a. Empty bucket.                                                     
3b. Make sure bucket is installed properly.               
3c. Check switch. Replace, if defective.

4.   Defective power supply cord or loose 

wiring in unit.

4.   Check wiring and supply cord. Repair or replace defective parts.

5.   Defective humidistat.

5.   Run diagnostics. Replace electronic control, if needed.

Fan runs - compressor         
does not run.

1.   Mechanical Models: Deicer thermostat 

open.       

2.  Electronic Models: Thermistor out of 

range or evaporator is less than 30°F.

1a. Let evaporator coil thaw. Normal if coil is frosted over.  
1b. Replace deicer thermostat if it is still open after coil thaws and 

warmed up.                                                                                    

2a. Unit in defrost mode. Raise room temperature.
2b. Run diagnostics. Replace electronic control, if needed.

3.  Compressor overload or relay defective. 3.   Check both components and replace, if defective.

4.  Compressor windings open.

4.   Check continuity and replace if one or both windings are open.

Fan does not run -               
compressor runs.

1.  Fan motor not getting power.

1.   Check wiring. Repair or replace, as necessary.

2.  Fan motor defective.

2.   Replace fan motor.

3.  Fan blade jammed.

3.   Remove obstruction. Replace if fan blade is damaged.

Fan and compressor run - 
evaporator coil frosted over.

1.   Ambient room temperature is too cold 

(non deicer model).

1.   Turn unit off until room temperature reaches 65°F (18.3°C).

Fan and compressor run -      
no dehumidification.

1.   Unit out of refrigerant.

1.   Follow sweep charge procedure to find and repair leaks.

2.   Humidity too low.

2.   Turn unit off until humidity goes up.

3.   Dirty evaporator or blocked air filter.

3.   Clean air filter and/or evaporator.

Unit runs - insufficient          
dehumidification.

1.   Area is not sealed off - open doors and/ 

or windows.

1.   Isolate area by closing doors and windows.

2.   Grilles obstructed.

2.   Move unit or items so grilles are not blocked.

3.   Dirty evaporator or blocked air filter.

3.   Clean air filter and/or evaporator.

4.   Low refrigerant charge. 

4.   Follow sweep charge procedure to find and repair leaks.

5.   Unit too small for area being                   

dehumidified.

5.   Close off into smaller area.

TROUBLESHOOTING

Electrical Shock Hazard

Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.