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CHANGING AN ELECTRIC HOT WATER ELEMENT

 

Electric Hot Water Maintenance

Often we are called out to look at electric hot water systems which are not performing as well as they should.  Taken on board we are purely talking about the electrical side of the system as you should contact a qualified plumber for the plumbing side of your system.  

 

 

 

Basically what we find are:-

If you ever find that you are taking a shower and the hot water produced at the time is not hot enough it could be one of two problems (a) your element is going (b) the time your tank needs to heat up through out the night (off peak supply) and the usage of your water is not set up correctly.  

 

Changing the Element

  1. If you don’t know what you are doing call (Quality Electrics 02 8509 5633) or a fully qualified electrician (make sure to see their correct electrical licences),
  2. YOU MUST TURN OFF THE “HOT WATER” CIRCUIT AT THE MAIN BOARD.  THIS IS A MUST! And if you can’t find the safety switch don’t mess around with it - call an electrician.
  3. Then double check that the power is off by using a voltage / amp meter at the other end of the circuit which is located at the tank side where the element is,
  4. Take off the element protective hatch and retest for power by taking off the plastic covering plate carefully,
  5. Then you need to disconnect one of the leads connected to the element,
  6. Then take your ohm readings which will tell you if you element is burnt out,
  7. Also test between element and earth (the tank itself) there should be no continuity FULL STOP!
  8. When taking out an element, you must turn off the water supply, however, before you do that you firstly put your hose on the valve at the bottom of the tank.  As a guide, draining a 315 litre (80 gallon) tank will take about 1 hour.
  9. Insure sure you have good water flow from the tank through the hose before you turn off the water supply,
  10. Take off all electrical connections from the element now,
  11. You then prepare your new element and don’t forget any washers,
  12. Then you need a correct size socket wrench to unscrew the element till you can hand untwist this off, and yank the element out,
  13. Simply screw the new element in tightly,
  14. Connect up all your electrical connections, set thermostats, and secure the protective lid back in place,
  15. Turn on the water supply again and fill the tank,
  16. After it is filled turn back on the power. (11 – 14 ohms)

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This page was last modified on 20 January 2010 and maybe out of date with regards to newer practices at the time of reading this article

 
 
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