The breaker switch for your water heater should be labeled, but if it isn’t, go ahead and turn off the main power.
Let the cold water flush through the drain valve for 5-10 minutes. You can skip the flush if it’s a newly-installed tank. Don’t attach the hose or open the drain valve, and use the nearby hot water tap to know when the tank is full – a steady stream of water without sputtering is the sign.
If you smell gas or a rotten egg odor, don’t go any further until calling your gas company — you could have a gas leak.
You may have to press the spark generator down every 10 seconds until it properly lights if it isn’t lit after 30 seconds.
It is not recommended to set the thermostat above 120 °F (49 °C) due to the risk of scalding.
Call your gas company if you smell a rotten eggs odor. This could be a sign that you have a gas leak.
If your pilot light goes out, light the pilot again and hold the pilot button down longer than the previous time.
The amp rating should be labeled on the water tank.
Tankless water heaters operate on-demand, so it will only start heating water once you need to use it. Since these water heaters are tankless, you don’t need to fill them up with water.
