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The AO SMITH 100112658 is a replacement pressure switch designed for use in water heating systems where accurate pressure sensing is required. Pressure switches monitor system pressure and send a signal to the control circuit when a set threshold is reached, allowing the system to operate safely within design parameters. This unit is rated at 0.27 inches and is installed by licensed plumbers and HVAC technicians during routine maintenance or component-level repair. Its role in the system is to protect equipment and maintain reliable operation under normal service conditions.
This pressure switch is intended as a direct replacement part for AO SMITH water heater equipment. It fits into residential and light commercial water heating applications where the original pressure switch has failed or requires replacement as part of a service call. Technicians sourcing this part by the AO SMITH part number 100112658 can use it as a like-for-like swap during scheduled or emergency service work.
Designed as an OEM-style replacement pressure switch for AO SMITH water heating equipment. Verify compatibility with the specific model and serial number before installation.
Installation should be performed by a licensed plumber or HVAC technician. Before servicing, shut off power to the unit and relieve any system pressure according to standard safety procedures. Confirm that the replacement switch matches the original part number and pressure rating before installing. Follow all applicable local codes and manufacturer service documentation during the repair.
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