Question about Water Heaters

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The water never gets hot when on normal settings

The tank use to be hot enough at settings of 120 degrees and it started not getting warm enough

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  • Expert
  • 51 Answers

This time of year the water comming in the house is much colder and heater has to work a lot harder to heat 40deg. water than ot does to heat 70deg water in the summer time. its normal.

Posted on Jan 12, 2013

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Posted on Jan 02, 2017

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freetek
  • 5568 Answers

SOURCE: not enough hot water. I have an Amtrol Extrol coil water heater

Since you mentioned 'both temperatures' it seems your unit is like most all of them, a lower and upper coil.
If your hot water supply runs out quickly, this normally means that the lower coil has failed. Since heat rises, the upper coil will never supply a tankful of hot water, just hot to start, and then as the flow continues, it doesn't have time to do more than warm the water flowing into the tank.
Every home should now own a simple digital multimeter; they cost less than $20 US everywhere and one can find them in auto parts stores, electronic supply companies and tool companies.
If you have a Harbor Freight tool store in your area, you can get them for under $10 US any time and sometimes even less:
Digital meter   
You need to be absolutely certain that the voltage to the water heater is shut down. Before you measure anything else, set the meter to its highest AC setting and check across the coils and then from either contact to the metal housing. If it is dead everywhere, then set the meter to the lowest Ohms scale (normally 200). The resistance of the coil should be nearly the same reading as when you simply short the meter's probe tips together. If it measures 'OL' then the coil is open and must be replaced.  

Posted on Feb 26, 2009

gary1121
  • 332 Answers

SOURCE: Whirlpool Energy Smart water heater not hot

I think some one mis informed you, the normal temp on any water heater from the factory is 120, it should not go above that for reasons of sevear burns, as far as it't smart part it's just a name, you will lose a couple of degrees just comming torm the tank to the faucets, the water heater will allways keep the temp in the tank at what ever it is set at, it doesn't have the brains or computer to know what time of day it is but when the cold water comes in to the tank it comes thru a dip tube that goes to aprox 1 inch from the bottom of the tank, if you take a long shower and do not have a energy efficant shower head you can use up to 5 gals, per min of hot water where an energy efficant one only uses 2.5 or less and still has the same pressure at the shower head, the temp in your water heater tries to stay at the setting it is at depending on how much is used at one time meaning washing machine, filling tub or dishwasher at the same time, it lets more cold in as the hot goes out and as you know it can only heat up so much at a time and the cold water is just going across the bottom of the tank, so the name is just that no diffrent then any other water heater unless you went to a tankless water heater.

Posted on May 29, 2009

rick_stokes_
  • 61 Answers

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

  • 832 Answers

SOURCE: Our 606 reliance electric hot water heater has the

We will just assume that "a" is the lowest temperature
to correspond to 120 degrees, while "c" for 160 degrees.
So try setting it at "a" and feel the hot water that flow.
Or it could be the other way. Just feel the hot water that
flow. It will be done in a few minutes. I hope this will help
you.

Posted on Nov 27, 2009

SOURCE: 2 green flashes. hot water is blazing hot set at

2 green flashes is 'High Water Temp.'
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html

Typical energy smart manual:
http://waterheatertimer.org/pdf/Whirlpool-energy-smart-electric-manual.pdf

3 flashes is Temperature Sensor failure.
4 flashes is Upper element
5 flashes is Lower element

Troubleshoot section says:
1) Make sure access doors and insulation are installed.
2) Check elements for resistance of 5-25 ohms (if element has a short in center of element, it might not trip breaker)
http://waterheatertimer.org/How-to-test-water-heater-element.html
3) replace element and reset control system.
Buy ordinary 4500 Watt element from hardware store.
http://waterheatertimer.org/How-to-replace-water-heater-element.html

4) I also suspect the self-diagnostic control box.
Manual says: Repair parts may be ordered through your plumber,
local distributor, home improvement center, or by calling
1-877-817-6750.
You need serial number, product number and model number from label on side of tank.

Posted on Jan 11, 2011

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1 Answer

What is the proper temperature setting for a hot water heater


The answer different if you have: concerns about diseases, a dishwasher, young children or elderly that can be easily burned, electric vs. gas heat, type of plumbing (e.g. PEX or Copper).

In 1988, the Consumer Product Safety Commission recommended that water heater manufacturers preset the maximum temperature at 120 degrees Fahrenheit to prevent burns. Since several states have mandated this maximum temperature.

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Atwood gc10a-4e only producing luke warm water


make sure bypass on back isn't open or half open then see if mixing valve on shower or outside shower off if all ok possible bad temp sensor

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1 Answer

Raise temp above 120


Raising temperature above 120 degrees requires service call.
Or change dip switch settings and risk voiding warranty and causing service call expense.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#temperature

Earliest versions of Rheem tankless 2006-8 let you set temperature up to 140 degrees F using remote.
However the hotter setting caused error codes because the burner cannot keep up with both high temperature and large volume of hot water rushing through pipe. Especially in winter with cooler incoming water that must be heated more to reach temperature set point.
The burner simply cannot keep up.
So Rheem changed maximum temperature at remote control to tepid 120 degrees, which is not hot enough for folks wanting hot shower, or folks filling whirlpool tub because water in tub cools before tub fills.

Oct 27, 2012 | Rheem Tankless Water Heater Main Remote...

1 Answer

Doesn't seem like we get enough hot water, how can i change the temp settings?


Remove cover plates from front of heater, usually four screws each.Seperate insulation enough to see and you will see the thermostat. It is factory pre set at 120 degrees and normally be adjusted to 140 degrees. Use a small blade screw driver to adjust settings. Ihope this helps you. Thanks

Nov 15, 2010 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

How do you set the thermostat above 120 degrees? My dishwasher requires 135 degrees. Thank you.


you shouldn't have to set your heater to 135. dishwashers have a built in heating element for just this purpose.

once you start going over 120 degrees on your water heater, you start creating scalding problems.
130 degree water can cause second degree burns in 30 seconds
140 degree water can cause second degree and even third degree burns in 6 seconds
150 degree water can cause third degree burns in 2 seconds.

be very careful !

Aug 05, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

My Reliance 606 40 gallon water heater only heats up enough hot water to fill a bathtub. We've drained it, the pilot light is fine, it heats up the water really hot, but it just doesn't seem to be able to...


How big is your bathtub? Is your water heater set on the hottest setting? What is the temperature of the hot water at the tap?

Keep in mind that hot water can cause severe burns. Children and those with diminished mental capacity can be seriously harmed by hot water.

The "40 Gallon" rating on the water heater is usually the amount of hot water the unit can produce in one hour. So the tank, and the amount of immediately available hot water, might be smaller than 40 gallons.

My bathtub is 2 feet wide by 1 foot deep and 4 feet long. This is 8 cubic feet or almost 60 gallons. So a 40 gallons of water at 120 degrees, mixed with 20 gallons of cold water (60 degrees), fills the tub with 100 degree water. My January cold water is 42 degrees, so it will take 40 gallons at 129 degrees to fill the tub. If the tub is cold to start it will take even hotter water.

So the water heater might be just fine.

Possible solutions:
1. turn the temperature up on your water heater- or the temperature control could be malfunctioning and not getting the water hot enough.
2. insulate your hot water pipes so that the water loses less heat on the way to the tub.
3. bigger water heater.
4. smaller bathtub, or less full bathtub.


Jan 04, 2010 | RELIANCE ELECTRIC WATER HEATER

1 Answer

Our 606 reliance electric hot water heater has the letters a b c for the temp control not 120-160 degrees. On what letter a-b or c should the temp be set on to get 120 degrees


We will just assume that "a" is the lowest temperature
to correspond to 120 degrees, while "c" for 160 degrees.
So try setting it at "a" and feel the hot water that flow.
Or it could be the other way. Just feel the hot water that
flow. It will be done in a few minutes. I hope this will help
you.

Nov 26, 2009 | RELIANCE ELECTRIC WATER HEATER

1 Answer

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.

Sep 16, 2009 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Whirlpool Energy Smart water heater not hot


I think some one mis informed you, the normal temp on any water heater from the factory is 120, it should not go above that for reasons of sevear burns, as far as it't smart part it's just a name, you will lose a couple of degrees just comming torm the tank to the faucets, the water heater will allways keep the temp in the tank at what ever it is set at, it doesn't have the brains or computer to know what time of day it is but when the cold water comes in to the tank it comes thru a dip tube that goes to aprox 1 inch from the bottom of the tank, if you take a long shower and do not have a energy efficant shower head you can use up to 5 gals, per min of hot water where an energy efficant one only uses 2.5 or less and still has the same pressure at the shower head, the temp in your water heater tries to stay at the setting it is at depending on how much is used at one time meaning washing machine, filling tub or dishwasher at the same time, it lets more cold in as the hot goes out and as you know it can only heat up so much at a time and the cold water is just going across the bottom of the tank, so the name is just that no diffrent then any other water heater unless you went to a tankless water heater.

May 29, 2009 | Water Heaters

1 Answer

Not enough hot water. I have an Amtrol Extrol coil water heater


Since you mentioned 'both temperatures' it seems your unit is like most all of them, a lower and upper coil.
If your hot water supply runs out quickly, this normally means that the lower coil has failed. Since heat rises, the upper coil will never supply a tankful of hot water, just hot to start, and then as the flow continues, it doesn't have time to do more than warm the water flowing into the tank.
Every home should now own a simple digital multimeter; they cost less than $20 US everywhere and one can find them in auto parts stores, electronic supply companies and tool companies.
If you have a Harbor Freight tool store in your area, you can get them for under $10 US any time and sometimes even less:
Digital meter   
You need to be absolutely certain that the voltage to the water heater is shut down. Before you measure anything else, set the meter to its highest AC setting and check across the coils and then from either contact to the metal housing. If it is dead everywhere, then set the meter to the lowest Ohms scale (normally 200). The resistance of the coil should be nearly the same reading as when you simply short the meter's probe tips together. If it measures 'OL' then the coil is open and must be replaced.  

Feb 26, 2009 | Amtrol ST-12-C THERM-X-TROL ASME Expansion...

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