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The AO SMITH 100112183 is a temperature remote controller designed for use with AO Smith tankless water heater systems. It allows the output water temperature to be adjusted beyond the factory default settings, giving installers and service technicians greater flexibility when configuring a system to meet specific demand requirements. The controller also functions as a diagnostic tool, providing access to error codes that support troubleshooting without requiring direct access to the unit itself. Licensed plumbers and HVAC technicians working on tankless system installations or service calls will find this controller a practical addition to the setup.
This remote controller is intended for use with AO Smith indoor and outdoor tankless water heater units. It connects to supported models to extend temperature control capability and simplify ongoing diagnostics. It is suited for residential installations where the heater may be mounted in a location that makes direct unit access inconvenient for routine adjustments or service checks.
Compatible with AO Smith tankless water heater models T-K4-IN, T-K4-OS, T-KJr2-IN, and T-KJr2-OS.
Installation should be performed by a licensed plumber or qualified HVAC technician familiar with tankless water heater systems. Before connecting or disconnecting any control accessory, shut off power to the unit at the breaker. Follow the unit manufacturer wiring diagram and any applicable local plumbing or mechanical codes. Do not attempt to modify the controller housing or extend wiring beyond manufacturer-specified lengths.
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