White-Rodgers 1C21-101 Thermostat

White-Rodgers 1C21-101 Thermostat is a dependable mechanical thermostat designed for 1-Cool, 1-Stage control. Featuring a fixed heat anticipator and a bi-metal sensor, this 24 Volt AC unit delivers precise temperature management across a 50–90 °F range.

With a vertical cover design and a compact footprint (2-7/8" W x 1-1/2" D x 3-3/4" H), it fits standard panels and uses standard R and Y terminals. The snap-action switch ensures fast, reliable responses to temperature changes. The 4°F differential keeps your space comfortable without frequent cycling, while the included switching sub-base simplifies installation.

• Mechanical thermostat with fixed heat anticipator
• 1-Cool, 1-Stage configuration
• 24V AC operation
• Snap-action switching for quick response
• Vertical cover design; compact size: 2-7/8"W x 1-1/2"D x 3-3/4"H
• Bi-metal construction with 4°F differential
• Terminals: R, Y; includes switching sub-base