Resideo ZD12X20TZ Damper 320788-702 or visible scorching at the

or visible scorching at the motor housing

As a genuine OEM Lennox replacement part (catalog number 19V97

which is essential for modern combustion safety and industrial heating equipment protocols

you should also inspect the fan motor and capacitors

Whether you are troubleshooting a non-responsive fan or restoring a commercial air handler

Resideo ZD12X20TZ Damper 320788-702 or visible scorching at theThe Resideo ZD12X20TZ is a heavy duty, 12" x 20" rectangular zone damper engineered for precision airflow management in TrueZONE and other 24V electronic HVAC zoning systems. This parallel blade zone damper features high integrity extruded aluminum construction, ensuring long term structural stability and a low leakage rate of less than 1% at 0. 5 in. WC. Designed for fail safe normally open operation, the integrated ZD series 24Vac actuator utilizes