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.
The defrost board uses 2 LEDs for diagnostics. The LEDs flash a
specific sequence according to the condition.
Leaves and other large obstructions should be removed from
the heat pump surfaces without damaging the fin surface of
If you need further assistance, you can write to the below
address with any questions or concerns:
Home Cooling and Heating
14610 Breakers Drive
Jacksonville, FL 32258
Troubleshoot the Defrost System
1. Disconnect power.
2. Remove control box cover.
3. Reconnect power and set thermostat for heating operation.
4. Observe LEDs and compare to Defrost Control Board
5. If a system failure is indicated, take appropriate action to
6. Turn off thermostat and disconnect power.
7. Replace control box cover.
8. Reconnect power.
ASSISTANCE OR SERVICE
Please include a daytime phone number in your correspondence.
To order accessories contact your Whirlpool
Defrost Control Board Diagnostic LED
Board failure or no power
Pressure switch open
Diagnostic LEDs chart.
Routinely clean or change the indoor air filter. Should the
indoor coil become dirty, thus restricting airflow, call a
qualified service person to clean the coil surface.
An annual inspection by a qualified person should be
performed to ensure continued high-quality performance.
flash with LED 2
Home Cooling and