Resideo ST9103A1002 Electronic Fan Timer 326058-755 Built to withstand the rigorous

Built to withstand the rigorous cycling of multi-zone layouts

or visible dirt buildup that cannot be cleaned without affecting balance are primary indicators that a new HVAC blower wheel is necessary

it is engineered to withstand the thermal stress and environmental exposure common in outdoor HVAC applications

Common signs include the fan not turning on after the burner ignites (causing the limit switch to trip) or the fan running continuously even after the thermostat is satisfied

Standardized Terminal Layout: Clearly marked terminals for rapid identification and wiring in the field

Resideo ST9103A1002 Electronic Fan Timer 326058-755 Built to withstand the rigorousThe Resideo ST9103A1002 serves as a robust electronic fan timer for modernizing HVAC furnace controls in both oil and gas applications. As a direct replacement electronic fan timer for the legacy 20123101 model, this unit functions as the primary 18 30 Vac interface for the combustion air blower, circulating fan, and oil primary control circuit. It features a fixed 45 second heat on delay and adjustable fan off delay settingsconfigurable to 60, 90,