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I have a ruud ruudglas pacemaker electric hot water heater. model number pem52-2b. first person to ake show in the moring has hto water for about 5mins and then it turns luke warm . when you wati about 10 mins before startin the second shower that person will seem to have all the hot water they need without water turning luke warm. Is this a termostate or element problem. The unit has an upper and lower element.

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  • Steve Pack
    Steve Pack Jul 24, 2017

    More than likely what is happening is that there is an accumulation of rust and water deposit that formed on the bottom of the water heater tank and this is inhibiting the transfer of heat from the to the water.

    There should be a drain on the bottom of your water heater that you should regularly drain the water from it. This should be done every couple of years to prevent such problems.

    Turn off your water heater temporarily, attach the end of a hose to the bottom drain and run the other end to a floor drain or nearby slop sink. Open the drain valve to help try and flush a lot of that sediment out from the bottom. Don't be alarmed if the water looks rusty or grainy, this is normal wear and tear for a water heater.

    See if this helps and if not then it is probably time for a new water heater.



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  • 62 Answers

Sounds like thermostat but element can be checked with a multi-meter, turn power off at fuse panel, pull one wire of element put multimeter on both screws on element using continuity setting should show continuity or beep as most do if not its burned out and needs to be replaced

Posted on Jul 25, 2017


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SOURCE: not enough hot water

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Posted on Apr 10, 2009

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SOURCE: warm water only

You can eliminate the shower control knob possibility by turning on your hot water anywhere else in the house. If you get hot water in other places, then it could be the knob causing it. A substantial lime buildup in the tank can also cause poor heat transfer from the elements to the water.

Posted on Sep 19, 2009

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