Tip & How-To about Plumbing

Diagnosis Electric Hot Water Tank Problems and Repair It

I understand that you electric hot water tank is not producing hot water. To diagnosis the problem we will need a few tools. Here is a list of the tools you will need.

Multi-meter
Screw driver (Flat and Philips)
ΒΌ inch nut driver or ratchet and socket
5/16 inch nut driver or ratchet and socket

Diagnosis Electric Hot water tank problems:


1. First you will need to remove the service panels on the side of the hot water tank to expose the thermostat and heating elements. Careful as power is still on to the unit. Now that you have removed the service panels we need to proceed to the next step.

2. On the thermostat there are two wires coming into the top two screws these are line one and line two they are the main power feed. Take your probes from the multi-meter and touch to each screw and you should receive a reading of 220 volts. If you receive this reading then move to the next step. If you do not get a 220 reading then your breaker is tripped or bad.

3. Got the proper power then you will want to check the thermostat reset button. In the middle of the thermostat is a red button press it in and see if it clicks. If the button clicks it means that the thermostat has tripped do to over heating. Wait an hour and see how your hot water is doing. If still the same replace the thermostat.

4. Use your multi meter to check for power to the heating elements. The heating elements have two screws with wires on them. You will want to take one probe to each screw and see what the VAC reading is (if power is present you should receive 220 volts) if you do not get the correct reading then the thermostat needs replaced. You will need to do the same thing to the lower element.

5. To check the heating elements turn off the power to the unit at the breaker. Check to make sure the power is off by using your meter at the thermostat. Remove the wires off of the element and check it for continuity if not continuity then the element is bad and needs replaced.


Replacing the Thermostat

1. Turn off the power.
2. Label and remove all wires from the thermostat
3. Pull clips forward on sides and pull thermostat upward to remove
4. Install new thermostat in reverse

Replacing the Element(s)

1. Turn off power to the unit
2. Turn off water to hot water tank and drain
3. Remove element from tank
4. Slide new element in tank
5. Turn water supply on and check for leaks
6. Reconnect wires
7. Turn on hot water faucet some where in the house to allow air to escape from tank.
8. Turn power on once hot water tank is full.

Thank you for choosing FixYa.Com

Justin

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Related Questions:

1 Answer

The thermal cutout pops on tank two after it shuts off. It boils then shuts off. It also turns off when taking a shower, producing cold water. I checked the ohm readings on the thermal cutout and the heating elements. everything seems to read correctly.


Question posted under Bosch tankless.
Question says 'tank'
Brand, model, and type heater unknown.
Elements mean electric.
'Thermal cutout pops when taking shower produces cold water' indicates tankless, since tank-type would maintain some hot water.
No error code might indicate tank-type.
Add a comment with type, brand and model number of heater for possible assistance.

Sep 24, 2012 | Bosch PowerStar AE125 AE125 Whole House...

1 Answer

Ruudglss Pacemaker electric water heater; still produces hot water, but the hot water last (in shower) for a much shorter time. The most likely cause is.?


Suspects include: Sediment in tank, shorting breaker, bad lower element, bad thermostat, water leak causing hot water to run out of tank:

Suspects that are excluded: Tank is not overheating, upper element is good, ECO reset button is not tripped, insulation and thermostat covers are present.

For troubleshoot resources and testing:
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

Take a moment and vote on answer:
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Aug 26, 2011 | Reliance & Lowboy& Electric Water Heater

2 Answers

hI i HAVE A rHEEM mODEL 11131507 SERIAL NO 2325549 MAN 16 nOV 2004 Rheemglas Electric Water Heater The water is never hot just luke warm very annoying Can you help please Wendy


You need to find and set at full its thermostat. Usually it is placed where its on light and power wire goes, open the screws and set thermostat on full position and close the screws again.

Jul 31, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

we have a reliance 606 50 gallon electric water heater. recently we noticed it has an internal leak. I removed the top and removed some of the insulation. the pipe fittings are dry but when you put water pressure to it it seems like its leaking from the side of the tank and its pushing water to the top of the tank. would you know of any areas i can look for a leak on the side?


I wrote a page on leaking water heaters.
With a checklist.
It sounds like you've done quite a bit already.
The element can leak around the gasket.
The TP valve can leak where it screws into side of tank.
Otherwise a leak on side of tank sounds like the tank is rusted through and needs to be replaced.
http://waterheatertimer.org/Water-heater-leaking.html

You should turn off electricity and water to the tank, and open tub valve on hot side to relieve pressure so the tank will not rupture.
Then you can limp along with a failed water heater by turning the water and electricity on only when hot water is needed.
This will buy you time until a new heater is installed.
A typical electric water heater produces 21 gallons of hot water per hour.
A shower uses 6-9 gallon of hot water, so heater only needs to be turned on 20-30 minutes for a shower, more if the incoming water is very cold.

To economize with your next heater, you might read the following two pages:
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html
http://waterheatertimer.org/Replace-anode-rod.html

Nov 08, 2010 | RELIANCE ELECTRIC WATER HEATER

1 Answer

My Reliance water heater suddenly produced only luke warmwarm water. I checked for power to the elements. Top one had nothing, bottom one had 110. I replaced the top element (which looked ok.) (power off, drained tank, pulled and replaced it, refilled tank, power on.) No change. Read up on water heaters, found I would have only a third tank of hot water if the bottom element was out, likely from sediment reaching it. Flushed the tank for an hour, pulled the bottom element (which had a big spot of corrosion 3/4 through the metal) and replaced it with old top element that looked good. I turned the power on for 15 minutes before remembering that I hadn't turned the water back on. Power off, filled tank, power on. (Hope that didn't hurt something.) No hot water at all. Replaced both thermostats. No heat yet, but top element shows 220 and bottom one has no power. What is wrong?


Lower element will always test 120V to ground since thermostats turn off one hot wire.

Listed below are suspects in order of ease.

1) Check that hot water is not running out of TP valve and down into a drain.
This will cause water heater to run all the time but not be able to keep up.

2) Test elements before replacing anything:
http://waterheatertimer.org/How-to-test-water-heater-element.html

3) Test electricity to water heater:
http://waterheatertimer.org/Test-electricity-to-water-heater.html

4) Replace both thermostats.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

5) Final thing would be full troubleshoot:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Sep 29, 2010 | RELIANCE ELECTRIC WATER HEATER

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