Tip & How-To about Plumbing
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.
Screw driver (Flat and Philips)
¼ 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.
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