Carrier HH12ZZ190 Limit Switch 321702-401 this OEM replacement transformer ensures

this OEM replacement transformer ensures impedance-protected operation to shield downstream low-voltage components from damage

enhancing safety and system reliability

or spark igniter must be purchased separately if they require replacement

ensuring a secure fit without the need for field modifications

Carrier HH12ZZ190 Limit Switch 321702-401 this OEM replacement transformer ensuresThe Carrier HH12ZZ190 Limit Switch is a critical safety component designed for precise thermal monitoring in residential gas furnaces. Engineered as a normally closed (NC) high limit control, this genuine OEM replacement part features a 190F fixed set point and a 40F differential. This means the circuit opens on a temperature rise at 190F to prevent heat exchanger damage and automatically resets when the temperature drops to 150F. Reliable thermal