ASKO Washer Error Code H8

The H8 code means the washer detected that the washing heater temperature increased by 10°F (5°C) or more within 30 seconds. This rate of rise indicates the heating element is operating without enough water in the tub to absorb the heat. The machine stops the cycle to protect the element and other internal components from heat damage.

No, you should not continue running the washer once H8 is displayed. The code indicates the heater is or was operating without adequate water, which can permanently damage the heating element and potentially create a fire or burn hazard. Leave the machine off until the cause is diagnosed and corrected.

Repair costs vary depending on the failed component. A pressure switch or inlet valve replacement is generally in the range of $50 to $150 for parts and labor. A thermistor is typically a lower-cost part, while a heating element replacement can run $100 to $250 or more with labor. Diagnostic fees from a technician are usually $75 to $120 and are often applied toward the total repair cost.

Some causes of H8 are DIY-friendly, such as cleaning a clogged inlet valve screen or confirming the household water supply valve is fully open. Checking and replacing the pressure hose or pressure switch is also manageable for experienced DIYers. Testing and replacing the thermistor or heating element typically requires a multimeter and some disassembly, so comfort with appliance repair work is helpful before attempting those steps.

Resetting the washer may clear the code temporarily, but H8 will return if the underlying problem is not fixed. The control board detects the overheat condition during the wash cycle, so any subsequent cycle that activates the heater without proper water level will trigger the code again. A reset is useful for testing after repairs, but it is not a solution on its own.