Patent ID: 11881362
Assignee: ILLINOIS TOOL WORKS INC.
Field: Furniture, games (Other fields)
Classification: CPC H  A  F  G | IPC A  H

Claim 0:
1. A warewash machine, comprising:
a housing at least in part defining a treatment chamber having an access opening;
at least one nozzle for emitting liquid into the treatment chamber;
a tank including a heating element for heating liquid in the tank, and a line running from the tank to the at least one nozzle;
a power line path for delivering power to the heating element;
a contactor for controlling power delivery to the heating element, the contactor including main power contacts connected in the power line path and auxiliary contacts that operate the same as, or opposite to, the main power contacts; and
a monitoring system operatively connected to the auxiliary contacts to monitor an open or closed state of the auxiliary contacts, wherein the monitoring system is configured to identify abnormal contactor operation based upon the open or closed state of the auxiliary contacts.