Question about Amtrol ST-120V-C THERM-X-TROL ASME Expansion Tank, 68 Gallon

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I have an Er3 reading on my water heater - Amtrol ST-120V-C THERM-X-TROL ASME Expansion Tank, 68 Gallon

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There could be air build up in the tank.

Posted on Mar 15, 2009

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Boilermate er3


is it an electric or gas or oil fired. Er3 means it is not getting up to temperature within the required time. Electrical - element bad. for oil or gas, no ignition or fuel supply.

Oct 28, 2013 | Amtrol ST-120V-C THERM-X-TROL ASME...

1 Answer

Hot water element


Make sure wires are removed from element when ohm-testing.
http://waterheatertimer.org/How-to-test-water-heater-element.html
Watt and voltage rating of element appears on end of each element.
Volts squared divided by watts = correct ohm testing.
Two-element water heaters are rated for 240Volts, but can be wired for 120Volts.
Check that water heater is receiving power from circuit breaker box.
So if breaker is 2-pole 240Volt, then check that heater is receiving 240 V across top two screws on upper element.
Replace upper element.
http://waterheatertimer.org/How-to-replace-water-heater-element.html
Other resources.
http://waterheatertimer.org/Test-electricity-to-water-heater.html

Oct 02, 2012 | Water Heaters

1 Answer

I would like to know location of reset button on hot water heater


If you have tank-type electric water heater, ECO reset is located on upper thermostat which is behind panel on side of water heater.
Be sure to put insulation back in place when finished so thermostat not exposed to cool air that will cause temperature misread.
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

If you have gas water heater, call service technician, and/or read manual.
ECO reset requires gas control valve replacement in many cases.
FV lockout requires replacement parts.
Some tanks have resettable thermal switch located behind gas door panel.
http://waterheatertimer.org/How-to-replace-gas-water-heater.html

If you have tankless, call service technician, and/or read manual.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Apr 21, 2011 | Water Heaters

1 Answer

High water in basement, the push button temp indicator reads both leds lite on both ends. i dont know who to reset


1) Call service technician.

2) If water heater flooded, contact insurance company for possible replacement coverage.

3) Manufacturer's suggest replacement of any flooded water heater.

4) Be very careful around wet or previously wet water heater.
Insulation inside tank will stay wet. Household electricity is grounded to water pipes that are connected to gas or electric water heater. Touching wet water heater can be fatal.

5) Read label on side of tank for product identification.
Read manual for possible part replacement.
http://www.rheem.com/product.aspx?id=772AB3A7-6282-4A0B-8657-21977DFB57E3
http://globalimageserver.com/fetchDocument.aspx?id=4e20f58c-94ce-4ac5-8971-9337178fb90f
http://waterheatertimer.org/How-to-install-gas-water-heater.html
http://waterheatertimer.org/Water-heater-manufacturers.html

Apr 20, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

Government safety!!! here is how it works, water heater wont stay lit idiot washing parts with gas near water heater wont blow up. its like gun laws protect everyone from idiots !!!!!!!!!!!!!!!!!!!!!!!!!!


I see you posed a complaint about government regulation of gas water heaters under Reliance electric water heater.

You should have been here at fixya for the guy yelling about his water heater not working after he painted the basement floor.
That dang government-mandated FVIR tripped and it saved a flashover.
It saved his life, and he didn't appreciate it, because he doesn't know how to read.
He thinks his world experience is all that needs to be known.
He never rose to management and never had to make long term decisions that affect other folks, and so he doesn't care about others.

Now if you didn't do your reading before-n-after buying a gas water heater, you won't know you're supposed to take apart and clean your combustion area and burner each year to prevent problems.
If you weren't aware of air intake located on bottom of water heater, then you might not know to set your water heater on bricks so you can easily clean the screen.
If you didn't read information and ask question from qualified folks before buying your water heater, you wouldn't know that Bradford White has a customer-resettable FVIR, while most other companies require you to buy parts and/or call a plumber.
If you don't read product information at Lowes, you might not be aware that new Whirlpool water heaters come with customer-resettable FVIRs.

If you don't read, then you don't know what FVIR stands for.

So let me tell you what FVIR stands for: When I was 27 in the tile business in Chicago, 1977, my brother and two helpers were laying VA tile in a basement using old black mastic. My brother stepped out. The whole basement blew up. It killed those boys dead. My brother missed it by a minute.
They were my friends.
You probably didn't read the paper that day to discover that black mastic was petroleum-based and was ignited by the water heater. Few years later the government banned use of that mastic because people were getting burned and killed all the time. Laying black mastic was like sitting in gasoline.

Those boy's families never forgot that lesson.
Maybe it's time for you to start reading and assume responsibility instead of repeating what you heard on TV.

Jan 09, 2011 | Reliance & 50gal Electric Water Heater

2 Answers

No hot water. Display reads ER3.


Hi, If you have the book for this system, then go to the problem solving to the rear of manual. This will tell you what code ER3 means, and what you need to do to correct it.
If you dont have the manufacturer's book then try to down load it!.
All boilers and water heaters have different fault finding codes, so can-not give any more info, unless you can tell me the exact problem.
Thanks Paul.

Aug 22, 2010 | Water Heaters

1 Answer

No hot water


Take these steps, ensure you are recieving correct voltage to the heater. If this has been confirmed, then using an ohmmeter, with the power turned off, check the resistance through you heaters. You should read a resistance through the heater(s). If you read OL, it means the heater is broken, and if you read 0 the heater is shorted. Hope this helps

Mar 29, 2010 | Rheem 30 GAL ELEC SHORT Water Heater 6YR...

1 Answer

ER3 no hot water


Er3 means that the water is being heated for more than 1 hour without reaching the set temperature.
Need new aquastat.

Sep 28, 2009 | Amtrol ST-120V-C THERM-X-TROL ASME...

2 Answers

No hot water from the Amtrol Boiler Mate model wh7p


The smart control was only reading 140 it never went up or down from that number and now it has an ER3 code seem the circulator just runs and runs

Mar 09, 2009 | Water Heaters

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