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Glenda MorrisAug 15, 2025
What to do if the GUSMER H-3500 Construction Equipment primary heater heats, but the red light on the Primary Heater Controller is continuously ON?
- JJonathan MillsAug 15, 2025
An over-temperature safety circuit with four thermal limit safety switches is attached to the heating tubes. If the tube surface temperature exceeds 230° F, the thermal limit safety switch will automatically trip the primary heater circuit breaker to OFF. Allow the Primary Heater to cool down before resetting the circuit breaker. Do not attempt to reset the circuit breaker more than once; determine and correct the problem's cause first.