Hotpoint Dishwasher Error Code AL08

AL08 is a temperature timeout fault on Hotpoint dishwashers. It triggers when the water in the wash chamber fails to reach the required temperature within a 60-minute window during a given phase. The control board monitors heating progress through the NTC thermistor, and if the target temperature is not achieved within that time limit, the alarm is raised and the cycle is aborted. A key detail noted in the fault definition is that the pressure switch remains in the FULL position just before the alarm fires, confirming the tub contains water and the fault is specifically a heating failure rather than a fill or drain issue.

The heating circuit involves several components that can contribute to this fault. The NTC thermistor is the temperature sensor responsible for reporting water temperature to the control board. If it becomes dislodged from its mounting position, it may read ambient or inaccurate temperatures, causing the board to perceive a heating failure even if the element is functioning. The heating element itself is another primary suspect, particularly if it has developed a false contact or an intermittent open circuit that prevents it from drawing full power. The ITR, a thermal overload device in the heating circuit, can also cause this fault if it is out of calibration or has tripped, limiting or cutting power to the element.

Excess suds from unsuitable or over-dosed detergent can also contribute to AL08 by insulating the water and interfering with accurate temperature transfer to the NTC sensor. Non-dishwasher-specific detergents are a common culprit. Technicians should begin by physically verifying the NTC is correctly seated, then test the heating element for continuity and proper resistance, inspect the ITR, and confirm the correct detergent type and dosage is being used.