Ao Smith 100111040 Water Heater Controller BTH-199A

Product Description

The AO SMITH 100111040 is a replacement controller designed for use with the BTH-199A 100 Series Cyclone Xi commercial gas water heater. This controller manages the operational logic of the water heater, regulating ignition sequencing, temperature control, and system diagnostics. It is an OEM-style component intended for installation by licensed plumbers or HVAC-R technicians servicing commercial water heating equipment. The part serves as a direct replacement when the original controller fails or exhibits fault codes that cannot be resolved through reset procedures.

This controller is specifically matched to the AO SMITH BTH-199A Cyclone Xi commercial gas water heater, a high-efficiency storage-type unit commonly found in light commercial applications such as restaurants, laundromats, small lodging facilities, and multi-unit residential buildings. Installation is performed during scheduled maintenance or emergency service calls when the existing controller is confirmed defective.

Key Features

• OEM-matched replacement controller for the BTH-199A Cyclone Xi commercial gas water heater
• Manages ignition sequencing, temperature regulation, and system fault diagnostics
• Designed for reliable drop-in replacement with no field modification required
• Supports the commercial-duty demands of high-volume hot water applications

Compatibility

Designed for use with the AO SMITH BTH-199A 100 Series Cyclone Xi commercial gas water heater.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC-R technician familiar with commercial gas water heating systems. Before servicing, shut off the gas supply and disconnect electrical power to the unit in accordance with local codes and the equipment manufacturer instructions. Confirm the replacement controller matches the existing wiring harness connections before reinstalling and restoring power. Verify proper operation and check for active fault codes after startup.

Technical Specifications

• Compatible Unit: BTH-199A 100 Series Cyclone Xi Commercial Gas Water Heater

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100111040