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Water heater keeps cutting off and flashing code 12, will work great for hours then do this, i have checked electrical and ground all ok.

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If you are on LPG try your regulator. The cheaper ones tend to stick, especially in cold mornings.

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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1 Answer

I have a us craftmaster EE2H50RD045V electric water heater. I worked fine until we had a 2 hour power outage and now its flashing to check the elements. It keeps resetting itself and flashing.


can only assume one or both elements shorted out and the only fix is to open it up and check them.start with the bottom one they usually fail before the upper

Oct 10, 2015 | Water Water Heaters

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Rinnai E110 cp , error code e29


Cause: Negative pressure on vent system (pressure difference)
Solution: Check vent system. Vent system and air intake system must be installed according installation instructions. IF vent system is OK: Replace fan

Jan 15, 2014 | Rinnai Water Heaters

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Water not getting hot in electric mode...heating element has been replaced, did not solve the problem.


Check switch and timer working ok also pencil Thermostat in side heating elemnt is ok and is turned up enough to call 4 heat

Sep 16, 2013 | Suburban Gas and Electric Water Heater, 12...

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My family is moving in...how do i increase hot water availability?


large water heater, turn p the themo stat to a higher setting ( watch for burns with young childern and older folks)

or the best install a tempering valve. this valve mixs hot water with cold water before it goes into the building.

Again if you have young ones or old people they can burn faster than any other group.the best is a larger heater for the DIY person.

Thanks Tom

Sep 13, 2011 | Rheem Water Heaters

1 Answer

The red button keeps poping causing the hot water heater to shut off. I have to constantly reset it.


The red reset button or ECO or energy cut off turns off power to electric water heater.
The ECO responds to temperatures in excess of 150 degrees F.

Preliminary work:
You can use thermometer to check water temperature immediately after ECO trips.
Compare water temperature against the thermostat setting.

There are 4 things that can cause ECO to trip:
1) Bad thermostat is sticking and letting element continue heating water, or ECO is reading incorrect temperature.
2) Factory installed insulation and cover missing from tank, and thermostat is exposed to cooler air and misreads tank temperature.
3) Element shorted to ground in center of element. This completes 120V circuit to ground which will cause element to continuously heat the water.
4) Loose wire near ECO causing high-heat electrical event.

Solution:
Check for missing insulation.
Check screw terminals for signs of high heat and burning >> tighten screws.
Replace both thermostats using detailed instructions given on link below.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

If the problem continues after replacing thermostats, more troubleshooting is needed:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

For more self-help information about your electric water heater:
http://waterheatertimer.org/Do-it-yourself-water-heater-timer.html

For more help, add a comment and I will respond

Nov 04, 2010 | Water Heaters

1 Answer

Water heater will not work unless i push reset button will work for 24 hours or so then will stop working and i have to go out and reset it


The reset button or ECO (emergency cut-off) is a safety device.
The ECO trips and cuts off power to entire water heater when it detects temperatures over 150 degrees.
This prevents overheating and eventual explosion of water heater.

The ECO will trip for 4 possible reasons:
1) Bad thermostat. Water temperature inside tank exceeds 150 degrees F because thermostat is sticking in ON position, and thermostat does not turn off element correctly.
2) Loose wire inside or near upper thermostat that causes ECO to sense higher temperature
3) Bad element shorted to ground near center of element, and short does not cause breaker to trip
4) Factory-installed insulation and cover are removed from water heater >>> cooler air causes thermostat to read wrong temperature, and thermostat keeps heating water inside tank

Steps you can take:
First thing is to check if factory-insulation-and-cover are present.
Next look for signs of burning at or near screw terminals. Tighten loose wire if found.
Especially check the lower element screw terminals.
Take a photograph of the parts so you can see the parts larger on your computer, and compare parts more easily when buying new parts.
Next most likely suspect are the thermostats.
For around $22, you can buy generic upper-and-lower thermostats at Lowes or hardware store > then replace the thermostat(s) and see if problem persists.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

If problem continues after steps above
You will need to test water heater parts to track down the exact problem:
You need a inexpensive multimeter from Radio Shack, and the steps are simple, and you will know everything about an electric water heater afterward.
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

Answer back if you encounter something not covered above, and I will help.

Oct 25, 2010 | RELIANCE ELECTRIC WATER HEATER

1 Answer

New Rheem electric 50 gallon not heating


Check the elements, if you have access to a meter to check them. If they are getting power to elements and you have no hot water.
The elements are not working correctly. I had some elements check out ok till the thermostat's turned on and the elements didn't heat.
Sounds like the elements are bad.

Jun 01, 2010 | Water Heaters

1 Answer

Electric Water Heater Using Too Much Electric.


Maybe you want to think about getting a tankless heater.The gad unit works real good.But the electric water heater i want to think you should check the thermostate.Maybe it is struck and not cutting off every time.

Mar 13, 2009 | Rheem 30 GAL ELEC SHORT Water Heater 6YR...

4 Answers

Rinnai tankless water heater code 12


12 - Flame Failure or Poor Ground

1. Immediate code 12 is usually a defective gas valve, power supply problem, or defective fan motor wiring harness.

2. If code 12 occurs after a few seconds it indicates that proper operation was established, but then stopped unexpectedly.

3. Verify that fuel is being supplied to the unit.

4. Check for proper electrical ground. Unit must use a grounded power supply.

5. Check for flue blockage on inlet or exhaust.

http://www.foreverhotwater.com/service-codes.php

Dec 31, 2008 | Rinnai Webstone The isolator EXP tankless...

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