Investigation summary: the affected device was received for evaluation.It had a corroded drain fitting, cracked water tank cover, outdated plate clip, and bent micro switch.After visual inspection the tank was filled with water, the temp check was attached, line cord plugged in, and power turned on.The customer's indicated failure was confirmed.The water level alarm triggered by the float switch is often mistaken for the disposable alarm triggered by the micro switch because of the unclear symbols on the display label.In this case, the micro switch was bent causing the disposable alarm to go off uncontrollably.The root cause was the bent micro switch.As a result, the drain fitting was replaced, along with the tank cover, plate clip, and micro switch.The service history review identified there was no indication that the complaint was related to a service of the device within the review period.
|