ASKO Washer Error Code H5

The H5 error on an Asko washer indicates that the water temperature during a wool or delicate cycle has reached 113°F (45°C) or higher, exceeding the safe limit for that program. The machine triggers this fault to protect sensitive fabrics from damage caused by overly hot water. It can be caused by a hot water supply that is too warm or by a malfunctioning thermistor reporting incorrect temperatures.

You should not continue running the wool or delicate cycle while H5 is active, as the elevated water temperature could damage delicate fabrics. The error is also a signal that something in the temperature sensing or water supply system needs attention. Address the underlying cause before resuming use of that cycle.

Cycling power may temporarily clear the H5 error, and if the root cause was a one-time spike in incoming water temperature, the reset may resolve it entirely. However, if the thermistor is faulty or the water supply is consistently too hot, the error will return when the wool or delicate cycle runs again. A reset is a useful first diagnostic step, but it is not a substitute for identifying and correcting the underlying cause.

In some cases, yes. Start by cycling power to reset the washer and check that your home's hot water supply temperature is not unusually high. If the error reappears consistently after a reset and the water supply temperature is normal, the thermistor or its wiring may need inspection, which a knowledgeable DIYer can often handle. If the control board is suspected, professional diagnosis is recommended.

If only a reset and water heater adjustment are needed, there is no parts cost. Thermistor replacement typically falls in the range of $20 to $80 for the part, plus labor if a technician is hired. Control board replacement is the most expensive scenario, generally ranging from $150 to $400 or more for parts and labor depending on the model and service rates in your area.