Lochinvar 100170643 Two-Stage Thermostat Control Board

The Lochinvar 100170643 is a two-stage thermostat control board designed for use with Lochinvar Solution CB-series hydronic boilers. This OEM replacement control board manages critical boiler functions including temperature setpoint control, high fire offset adjustment, tank aqua-stat monitoring, outdoor sensor input, and fault diagnostics.

Key Features:

• Compatible with Solution CB 045-260 boiler models
• Two-stage firing control for efficient operation
• Adjustable maximum and minimum setpoint controls
• High fire offset adjustment capability
• Tank aqua-stat and outdoor sensor inputs
• Built-in fault diagnostic system
• Designed for M9 series boilers beginning at serial I12

Replaces: TST30017, TST20036, 100170563

This genuine Lochinvar control board ensures reliable operation and precise temperature management for your commercial or residential hydronic heating system. Professional installation is recommended for proper setup and calibration of all control parameters.