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Reliable Time Delay: The 45-second thermal expansion relay is compensated for ambient temperature variations
making it an essential component for controlling HVAC ventilation fans
it breaks the circuit to the gas valve or heating elements as a safety precaution while keeping the fan running to dissipate excess heat
Replace the component if the lens becomes clouded
Lennox 99G99 Blower Wheel 322838-754 Reliable Time Delay: The 45-secondThe Lennox 99G99 Blower Wheel is a precision engineered OEM replacement part designed for high static pressure applications within residential and commercial HVAC systems. Featuring a 1 2 inch bore and a 9x8 diameter to width configuration with clockwise (CW) rotation, this direct drive blower wheel ensures optimal airflow and static efficiency. Constructed from high grade galvanized steel, the 99G99 is balanced to minimize vibration, reducing stress
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