This genuine OEM replacement part is essential for restoring optimal combustion efficiency and maintaining the proper manifold pressure required for stable ignition

Ensure the motor is designated as "speed controllable" before integrating this HVAC blower speed switch into the circuit to maintain motor winding integrity

such as the AT floating or AP proportional models

For technicians troubleshooting indirect-fired gas heaters or makeup air units

Common Questions: Can I use this with a 2-stage heat pump

Neptronic TRO5404 Thermostat R-410A This genuine OEM replacement partThe Neptronic TRO5404 Thermostat is a high performance room controller thermostat designed for precision management of commercial HVAC systems, including variable air volume (VAV) clusters and modulating duct heaters. Engineered for 24 VAC low voltage operation, this proportional controller features 2 heat 2 cool analog outputs (0 10VDC) along with a dedicated TPM (Time Proportional Modulation) signal, allowing for granular control over damper