ASKO Dryer Error Code H1

H1 on an Asko dryer indicates a humidity sensor error caused by a short circuit defect in the sensor circuit. The control board detects an indicated value lower than 24, which is outside the valid operating range. When this fault is active, the dryer will buzz every 10 minutes for 10 seconds. The error must be resolved by diagnosing and repairing the sensor circuit rather than simply resetting the machine.

Cycling the power will cause the error display to go off temporarily, but this does not resolve the underlying fault. Once the dryer attempts to operate again, it will re-detect the short condition in the humidity sensor circuit and the H1 code will return. A lasting fix requires repairing or replacing the defective component.

Repair costs vary depending on the failed component. A humidity sensor replacement part typically falls in the range of $20 to $80, while professional labor to diagnose and replace it may add $80 to $200 depending on your location and the service provider. If the control board is found to be at fault, costs will be higher, generally ranging from $150 to $400 or more for parts and labor.

A knowledgeable DIYer can start by inspecting the sensor wiring and connectors for visible damage, corrosion, or loose connections, which do not require parts to address. If the wiring checks out, replacing the humidity sensor is the next step and requires sourcing the correct replacement part for your model. Control board replacement is more complex and generally warrants professional service.

Running the dryer with a faulty humidity sensor is not recommended. The sensor is responsible for controlling the drying cycle, and without accurate moisture readings, the dryer cannot regulate the cycle correctly. Continuing to operate the machine could result in overdrying, potential overheating, or further damage to related components.