Question about Bradford White M240s6ds-1ncww 40 Gallon Electric Water Heater - Sh

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Too much hot water, how to adjust water temperature

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  • M. O.
    M. O. Jan 24, 2013

    Really helped, thanks.


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1) Copy following links:

2) if you have electric water heater, and too much hot water, then thermostat may be bad, or element is shorted and needs replacement. Test elements first, and if they're ok then replace both thermostats.

Posted on Jan 22, 2013

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Water heater

Most instant-on tankless water heaters require at least 10 psi of water pressure to start the heating process. The flow of water determines how hot the water will be, within the heating range. An electric 110 volts heater will increase the water temperature about 25 degrees F. A gas water heater will increase the water temperature about 45 degrees F.
Too much flow will not allow the water time to heat. Too little flow will not allow the heating system to work. Each heater must have the outflow water flow adjusted for the best heating outcomes. The best way to find the ideal flow is to turn the hot water facet on and adjust it (open or close) until the water reaches the balance of producing hot water.

Apr 25, 2016 | Water Water Heaters


Electric Hot Water Heater Temperature Adjustment

If your electric hot water heater is not getting your water hot enough or your water is too hot then you can make the adjustment easily yourself. There are a few things that you may need to know to do this. I will go over where the thermostat(s) are located and also how to make the changes.

The first thing to remember is to make sure that the power is turned off to the hot water heater before you attempt to open any of the covers and make any adjustments.

The next thing is to locate the covers which are over the thermostats and the elements. There are two on most hot water heaters, one for the top and one for the bottom. One or two screws hold these covers in place. They will look like this when you look at the front of the hot water heater.

When you have the cover removed you will see that the top thermostat, reset safety control and the element look like this.

The bottom thermostat and element look like this.


If you need to reset the hot water heater you push the red button on the top thermostat in hard till it clicks. To change the temperature setting on the thermostat you need to take a screw driver and turn the dial to the desired temperature either higher or lower as you prefer.

The elements can also be checked by using and ohm meter and checking for resistance across the two terminals of the element. If you get no resistance or a high resistance the element is no good. A normal reading with most meters will be somewhere in the 8-25 ohm range. This even gives a bit of buffer for different meters and the possibility of them being a bit out of calibration.

For most people a simple adjustment of the temperature settings will be sufficient to give you the results you want. Remember that you may need to adjust the thermostat for both elements to get the desired result. Also remember that you can get a longer time before you run out of hot water if the water is hoter and you mix more cold into it. The downside of that is the chances for scalding are greatly increased with hotter water. If you have small children or elderly adults, think carefully about what very hot water can do to them.

For higher efficiency you also want to keep the water temperatures as low as possible to reduce the residual heat loss of the stored hot water.

on Apr 29, 2010 | Water Heaters

1 Answer

Water heats up then trips off red button

The lit red button may be an indicator that the water temperature inside the water heater flow channel has become too hot. If the outflow facet is adjusted to allow more water outflow (opened more) the water temperature should drop some and therefore with increased water flow, the temperature inside the water heater will also decrease. Or, if there is a manually adjustable outflow valve on the water heater, adjusting it to a more open position would also decrease the internal temperature.

Sep 17, 2015 | Water Water Heaters

1 Answer

Why do we need to have to continuously adjust the temperature of the water when we're taking a shower. We have a new Rheem gas .hot water tank

It *may* not be a problem with the water heater itself necessarily. When you say "keep adjusting the water temperature when you're taking a shower" I presume you're talking about turning the shower hot/cold knob(s) and not the temp thermostat on the water heater itself.
If so, when it starts to run colder, turn the knob all the way to full hot. Is the water then very hot? If so, the water heater is working fine & doing its job, and the problem is likely to be in the shower faucet mixing valve itself. Sometimes a faulty one will expand the inner seals/cartridge as hot water flows thru it, and starts to (wrongly) restrict the hot water flow, thus causing the constant need to "turn the dial up a notch".

Oct 29, 2014 | Rheem Water Heaters

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How to adjust hot water Gets too hot

Check you data plate. The inlet temperature must match the machine requirements, which means that your incoming water is too hot and the water heater temperature needs to be turned down. Here is a link to a installation/service manual.

Apr 17, 2014 | Wareforce CG Underbar Glass Washer...

1 Answer

Rheem 21vp40 1

Copy following links to identify type of thermostat, and see how to adjust temperature on that specific thermostat, and see other ways to increase amount of hot water
Add a comment and describe if water heater is gas or electric, and add what other problems you are experiencing.

Jul 14, 2013 | Water Heaters

1 Answer

I have an Atwood GGA-8E about 6 months old was getting hot water but now the water is only luke warm, any adjustments?

There should be a temperature setting on the gas valve. It should be on top or front and have several settings normally vacation, warm and hot. Rotate dial towards hot setting to increase water temperature. Hope this helps. Thanks

Nov 17, 2010 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

I need to adjust water temperature, and dont have a manual. i have a 81v40d C model , 40 gal electric.


Here is a tip that I wrote to help people understand how to adjust the temperature on their electric hot water heater.

Electric Hot Water Heater Temperature Adjustment

Oct 16, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Water not hot enough

Check out this tip about adjusting the water temperature on electric hot water heaters...

Electric Hot Water Heater Temperature Adjustment



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