Water Heaters - Water Temperature Adjustment

Safety, energy conservation, and hot water capacity are factors to be considered when selecting the water temperature setting of the water heater. Water temperatures above 125°F can cause severe burns or scalding. Be sure to read and follow the warnings outlined on the label located on the water heater near the top of the tank. 

The chart below may be used as a guide in determining the proper water temperature for your home:  

Time/Temperature Relationship in Scalds

TemperatureTime to Produce a Serious Burn
120°F (49°C)More than 5 minutes
125°F (52°C)1-1/2 to 2 minutes
130°F (54°C)About 30 seconds
135°F (57°C)About 10 seconds
140°F (60°C)Less than 5 seconds
145°F (63°C)Less than 3 seconds
150°F (66°C)About 1-1/2 seconds
155°F (68°C)About 1 second

Table courtesy of Shriners Burn Institute

There is a Hot Water SCALD Potential if the water temperature thermostat is set too high. Households with small children, disabled or elderly persons may require a 120°F (49°C) or lower thermostat setting to prevent contact with “HOT” water. Please thoroughly review the details of this critical information by reading the safety information in your Owner's Manual. Download a copy of the Owner's Manual

The thermostat has been set at the factory to 120°F (49°C) to reduce the risk of scald injury. This is the recommended starting temperature setting, but it can be adjusted to any temperature between 90°F and 150°F (32°C and 66°C) on electric thermostat-controlled models or between 100°F and 140°F (38°C and 60°C) on electronic-controlled models. 

Water Temperature Setting

The temperature of the water in the water heater can be regulated by setting the temperature dial of the adjustable surface mounted thermostat(s) located behind the jacket access panel(s). Dual element heaters have 2 thermostats. For detailed instructions on how to adjust the thermostat(s), refer to Owner's Manual for the specific model. Download a copy of the Owner's Manual.