Error Code HC4
The hot air drying system got dangerously overheated
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: HC4
What This Means
Drying Duct Temperature Sensor failure; Drying heater relay stuck on; Main PBA defect
What actually causes this:
The temperature sensor for the dryer stopped working properly and the heater did not shut off in time
First Thing to Check
Turn off the dishwasher at the breaker immediately and let it cool completely
Parts Involved
How to Fix
- 1
1. Check drying duct temperature sensor — see tC1 diagnostics
- 2
2. Check drying heater relay — see HC2 diagnostics
- 3
3. If sensor and relay test normal, replace Main PBA
This Error Applies To
Samsung DW80B7070A Series Dishwashers (2023) (2023–present)
Related Error Codes
The dishwasher is not getting enough water to run
The dishwasher cannot pump the dirty water out
The heating element is not warming the water properly
The water inside the dishwasher got dangerously hot
The hot air drying system is not heating up properly
The water temperature sensor is not reading correctly
The temperature sensor in the drying system is not reading correctly
A control panel button appears to be stuck or held down