As a direct 100208551 replacement part

Efficient Diagnostics: Standardized terminal blocks allow technicians to quickly verify line voltage and 24V output during troubleshooting

the 387210R is the official superseded part number for the 387210

or if the frame is warped

for proper 3-7 PSI operation

Carrier HH680405 Limit Switch Refrigerant As a direct 100208551 replacementThe Carrier HH680405 Limit Switch is a critical safety component designed for precise thermal regulation within high performance HVAC systems. Engineered as an Auto Limit Switch, this part features a broad operating range of 30 250F, making it a versatile OEM replacement part for Carrier, Bryant, and Payne furnaces. As an HVAC high limit switch, it monitors discharge air temperatures to prevent heat exchanger damage or hazardous operation. Its