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    nastro's Avatar
    nastro Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Feb 17, 2008, 02:56 PM
    Hot water heaters
    I am having trouble getting 240 volts to both of my hot water heater elements after buying a new thermostat. The bottom element has 240 but the top one only is 100 how can I fix this?
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Feb 17, 2008, 07:47 PM
    100V or 120V at top?
    nastro's Avatar
    nastro Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Feb 17, 2008, 07:51 PM
    Quote Originally Posted by hkstroud
    100V or 120V at top?
    110 volts bottom has 240 volts, water heater is set up for 240 all around
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #4

    Feb 17, 2008, 07:58 PM
    Elements work one at a time. When bottom element satisfied top comes on. Don't remember exactly how switching is done. Probably only one leg switched off. How did you take voltrage readings on top. Element to ground or element terninal to element terminal?
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #5

    Feb 18, 2008, 06:52 AM
    Look at this pic. And answer HK's question.

    Sounds like You have only 1/2 power going to upper thermostat.. so new thermostat was miswired or new thermostat is defective. OR you took a bad reading! Let us know what you find
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