The overtemp tank thermostat will protect your glue tank from over heating in the event that the heater decides to run away. This can be caused by a faulty heater or faulty RTD sensor.
If your Nordson® unit will not power on, check the continuity between the leads of your over temp thermostat. You may need to replace the tank over temp thermostat.
This is a 500 degree open on rise over temp thermostat that sells for $50.00/each.
We recommend you keep one of these on the shelf for backup.
Have other issues with your melter, please call us for free technical assistance.