Ao Smith 100109935 Blocked Outlet Switch

Product Description

The AO SMITH 100109935 is a blocked outlet switch designed to detect exhaust or flue outlet obstructions in water heater systems. When airflow through the flue or vent path is restricted, the switch interrupts the burner circuit, preventing unsafe operation. This safety component is installed by licensed plumbers and HVAC technicians during routine maintenance or when a faulty switch triggers nuisance lockouts on the water heater.

This blocked outlet switch is used in residential water heater applications where venting safety cutoffs are required. It is suited for installations where the appliance relies on proper exhaust flow as a condition of burner operation. Technicians replacing a failed or suspect switch during a service call will find this part a direct fit for applicable AO SMITH water heater models.

Key Features

• Detects blocked or restricted flue and exhaust outlet conditions
• Interrupts burner circuit on obstruction detection to prevent unsafe operation
• OEM part number 100109935 ensures direct-fit replacement
• Designed for residential water heater venting safety systems

Compatibility

Designed as an OEM-style replacement blocked outlet switch for AO SMITH water heaters requiring part number 100109935.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician familiar with water heater venting systems. Shut off the gas supply and disconnect power to the water heater before beginning any service work. Verify the vent path is clear of obstructions before installing the new switch, as a blocked flue condition may have caused the original component to fail. Follow all applicable local codes and manufacturer guidelines when restoring the appliance to service.

Technical Specifications

• Product Type: Blocked Outlet Switch

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100109935