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New water heater, shower hot then only warm water in 5 minutes

I installed a new water heater and have hot water in the kitchen on the first floor. On the second floor in my bathroom shower, the water starts out hot but in 5 minutes, the water comes out only warm. My bathroom sink is the same way. I don't believe I have lost any water pressure. I have the same brand, type and gallon capacity as my other water heater.

I sure would appreciate any help. Thank you

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  • Wotnext Jan 25, 2009

    Our hot water will start hot then run cold. We have had this heater for 2 years now. It is gas. It is the small version of the Infinity series. We do not have a manual.

  • Anonymous Feb 20, 2009

    Hot water in the rest of the house but not in shower. Becomes only warm after a couple of minutes.

  • Anonymous Mar 30, 2014

    lose hot water after 10 minutes

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Make sure water inlet and water outlet pipes are not reversed. this would cause that exact problem.

Posted on Apr 01, 2010

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  • 359 Answers

Try this, set the bottom therostat if it is electric , 10 degrees hoter than the top is set , if gas have no ideas

Posted on Dec 06, 2008

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