Fisher & Paykel Washer Error Code #9

Error code #9 on a Fisher & Paykel washer indicates a mismatch between the machine size setting currently active in the control system and the machine size value stored in non-volatile memory. Fisher & Paykel washers are designed to accommodate different drum or tub capacities, and the control board references a stored machine size parameter to calibrate water fill levels, cycle timing, and load sensing. When the live setting and the stored memory value disagree, the controller cannot operate with confidence and triggers this fault to prevent incorrect wash performance.

This type of error most commonly surfaces after a control board replacement, a power surge, or a memory corruption event that causes the stored configuration data to be lost or altered. It can also occur if a replacement control board was not properly programmed to match the specific machine variant before installation. In some cases, a prolonged power outage or voltage irregularity can corrupt the EEPROM or onboard memory where machine configuration data is held, causing the mismatch on the next startup cycle.

The resolution involves performing the Machine Size Setting procedure, which writes the correct size parameter back into the controller's memory. This is accomplished by pressing and holding the WASH TEMP UP button, then pressing the POWER button, then pressing the SPIN SPEED UP button until the Hold LED illuminates, and finally pressing the POWER button to return to normal operation. This sequence forces the control system to save the correct machine size value, resolving the conflict and clearing the fault code.