With power disconnected and the part at room temperature

and blower assembly

installing a MARS 32605 heater keeps the oil warm to prevent this mixture

While both are 10

Bard 8402-019 Thermal Cutoff With power disconnected and theThe Bard 8402 019 Thermal Cutoff is a critical safety component designed for HVAC high limit protection. This 128C thermal fuse link serves as a non resettable safety device that monitors ambient temperatures within the cabinet or heater assembly. When the Bard replacement part detects a temperature excursion exceeding its 128 degrees Celsius rating, it opens the electrical circuit to prevent equipment damage and potential fire hazards. This thermal