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the switch automatically closes the circuit to resume normal operation
it triggers a shutdown if flue gases are not drafting correctly or if a heat exchanger failure occurs
ensuring the correct millivolt output and terminal fit for HVAC gas valves
This is typically caused by a failing thermocouple that can no longer generate the 25û30 millivolts required to hold the pilot valve open
Bard HVAC 8402-114BX Thermal Cutoff the switch automatically closes theThe Bard HVAC 8402 114BX is a critical safety component designed for precise over temperature protection in wall mount air conditioning and heating systems. As a veteran grade OEM replacement part, this 93C thermal cutoff functions as a non resettable high limit safety, engineered to open the electrical circuit if internal temperatures exceed 93C (200F). Frequently found in the electric heat sections of HVAC units, it acts as a permanent fail safe to