A.o. Smith 100109920 Thermostat Single Pole Double Throw

Product Description

The A.O. SMITH 100109920 is a single pole, double throw electric thermostat designed as a replacement component for electric water heaters. It incorporates a high-limit safety function into a single unit, eliminating the need for a separate high-limit device. The thermostat is Type 89T13 and covers an adjustable temperature range of 120 degrees F to 180 degrees F. It is installed by licensed plumbers and HVAC technicians performing water heater service, repair, or component-level replacement on residential electric units.

This thermostat is suited for residential electric water heater applications where the original single pole, double throw thermostat requires replacement. Its integrated high-limit design makes it appropriate for upper or lower thermostat positions depending on the original equipment configuration. The adjustable range allows the technician to set the target temperature to match system requirements and local code compliance thresholds.

Key Features

• Single pole, double throw switching configuration for standard electric water heater control circuits
• Integrated high-limit function combined into one assembly for simplified replacement
• Adjustable temperature range from 120 degrees F to 180 degrees F
• Type 89T13 thermostat classification
• OEM replacement part for A.O. SMITH electric water heaters

Compatibility

Designed as an OEM-style replacement thermostat for A.O. SMITH electric water heaters requiring a single pole, double throw Type 89T13 thermostat with integrated high-limit.

Installation Notes

Installation should be performed by a licensed plumber or qualified service technician. Disconnect power to the water heater at the breaker before removing the access panel or handling any electrical components. Verify the replacement thermostat matches the pole and throw configuration of the original before wiring. Follow all applicable local electrical codes and manufacturer wiring diagrams during reinstallation.