Error Code HC1
The heating element isn't warming the water properly
Moderate
Address soon - your appliance may not work properly
Also displayed as: No display (HC1 in recall)
What This Means
Heater is out of order (burned out or open circuit); Heater is improperly connected; Heater relay on Main PBA is defective
What actually causes this:
The heating element burned out or the water level is too low for the heater to safely turn on
First Thing to Check
Check if your dishes feel cold after a cycle — if so, the heater has likely failed
Parts Involved
How to Fix
- 1
1. Check the connections of the heater connectors — reconnect if loose
- 2
2. Check the resistance between both ends of the heater directly, or check the resistance between the red wire of the Heater Relay and the black and yellow wires of the Power Relay — Normal: approximately 12.14-14.16 ohms. Check after disconnecting circuit breaker or power cable
- 3
3. Check the connections of the Heater Relay in Main PBA — reconnect if loose. Check the voltage between the Red wire of the Heater Relay on the base and the White wire of the CN101 connector — Normal: 110-120V while operating
- 4
4. Check the drain hose installation condition — if water level in tub is low, the safety program prevents heater operation, causing HE error
- 5
5. Check the thermistor — see tC check code procedure
- 6
6. If heater tests normal, replace Main PBA
Other Error Codes for DW80M9990US
The dishwasher's main computer and the display board can't talk to each other
The motor controller board inside the dishwasher stopped responding
Water is leaking inside the base of the dishwasher
Too much water detected inside the dishwasher
The water distribution motor that directs spray isn't working properly
The main wash pump that sprays water isn't working properly
The dishwasher door isn't fully closed
The automatic door-opening feature isn't working