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    lenoirleon's Avatar
    lenoirleon Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 8, 2017, 06:33 AM
    Changed temperature on hot water heater
    I changed the temperature setting on my hot water heater without turning the power off first. Is this going to cause a problem for me?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Aug 8, 2017, 07:12 AM
    No. Since you mentioned "power" I will assume it is electric. Be careful, that is 240 volts there!
    talaniman's Avatar
    talaniman Posts: 54,327, Reputation: 10855
    Expert
    		  
    #3

    Aug 8, 2017, 07:25 AM
    My question is WHY you are changing it? What kind of system do you have? Electric, gas? You can review these videos for knowledge and insights, but since you have done it already and didn't shock yourself consider yourself lucky depending on what kind of thermostat your hot water heater has.

    https://www.bing.com/videos/search?q...il&FORM=VIREHT

    My rule of thumb, anytime you have a screw to adjust make sure there is no power to the unit. If your water heater has a knob for temperature adjustment then no safety issue.

    So why did you adjust the temperature on your water heater? Up, or down?
    joypulv's Avatar
    joypulv Posts: 21,591, Reputation: 2941
    current pert
    		  
    #4

    Aug 8, 2017, 03:15 PM
    I usually turn mine down in summer. This year I forgot. In winter, heat is quickly lost from the basement to the faucets, so I keep it a bit higher.
    Mike45plus's Avatar
    Mike45plus Posts: 230, Reputation: 27
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    #5

    Aug 13, 2017, 05:15 AM
    lenoirleon,
    Perhaps. Tank type water heaters should have a minimum thermostat setting of 135 degrees Fahrenheit; this temp setting will prevent the growth of Legionella bacteria. An approved thermostatic tempering valve should be installed on the outlet piping and set to prevent scalding water from reaching fixtures & faucets in residential properties...
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