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scale buildup
it triggers a shutdown if flue gases are not drafting correctly or if a heat exchanger failure occurs
This is typically caused by a failing thermocouple that can no longer generate the 25û30 millivolts required to hold the pilot valve open
the switch automatically closes the circuit to resume normal operation
this electrical start relay provides the necessary pulse to overcome initial inertia in heavy-duty HVACR systems
Bard HVAC 8402-114BX Thermal Cutoff scale buildupThe 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
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