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  2. Tips for troubleshooting water heater issues - AOL

    www.aol.com/tips-troubleshooting-water-heater...

    Always turn off the gas and power before working on your heater. And if there’s a standing pool of water, shut off the gas and water supply to the heater and step away. Contact a licensed ...

  3. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    Turning off exactly at the setpoint will ... of an electric water heater at a temperature hot enough to ... thermostat switches, in turn controls the input of fuel to ...

  4. 11 Reasons Why Your Water Is Only Lukewarm - AOL

    www.aol.com/11-reasons-why-water-only-171300843.html

    To save money and conserve energy during the summer, many homeowners turn down the thermostat on their hot water heaters. The trick is, in the winter, you have to remember to turn it back up ...

  5. Infinite switch - Wikipedia

    en.wikipedia.org/wiki/Infinite_switch

    An infinite switch, simmerstat, energy regulator or infinite controller is a type of switch that allows variable power output of a heating element of an electric stove. It is called "infinite" because its average output is infinitely variable rather than being limited to a few switched levels.

  6. Mercury switch - Wikipedia

    en.wikipedia.org/wiki/Mercury_switch

    This is what older style thermostats used to turn a heater or air conditioner on or off. The mercury displacement switch uses a 'plunger' that dips into a pool of mercury, raising the level in the container to contact at least one electrode. This design is used in relays in industrial applications that need to switch high current loads frequently.

  7. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    With a central water heater of any type, any cold water standing in the pipes between the heater and the point-of-use is dumped down the drain as hot water travels from the heater. This water wastage can be avoided if a recirculator pump is installed, but at the cost of the energy to run the pump, plus the energy to reheat the water ...