receiving 24V from the thermostat circuit to initiate the high-voltage sequence required for the hot surface igniter

Enhanced Diagnostics: On-board LED flashes specific fault codes

by adding a ZG-R01 500 Ω resistor

Does the AV-393 support steam applications

Carrier HH18HA430 Limit Switch 322027-701 receiving 24V from the thermostatThe Carrier HH18HA430 Limit Switch is a critical safety component designed for precise thermal regulation within high performance HVAC systems. As an OEM Carrier replacement part, this auto reset limit switch features a calibrated 100 130F temperature range, ensuring the system maintains safe operating parameters by interrupting the circuit when the high limit threshold is reached. Engineered for reliability in the field, it functions as a furnace