Set the thermostat to the lowest setting but leave the ignition switch set to on. Switch the gas valve off. Wait about five minutes for gas to clear. Then return to the water heater and smell for gas.

For gas water heaters, look for the temperature dial ... Electric water heaters usually have two thermostats -- one at the top and one at the bottom of the tank -- hidden behind access panels.

Should you set your thermostat to ’emergency heat’ when weather is very cold? A DOE spokesperson tells Nexstar that data shows nearly 70% of shipments of tankless gas water heaters today ...

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