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439 posts

Ultimate Geek

# 143585 20-Apr-2014 00:48
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Hi guys,
Where can I buy a thermostat my Hot Water Cylinder has started overheating, I live in Christchurch.

Any help appreciated.

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3267 posts

Uber Geek


  # 1028040 20-Apr-2014 07:50
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Bunnings, Ideal Electrical, Mitre10...
Could also be the pressure relief valve (especially if a low pressure system).  Is the water really hot or is it overflowing?

You can never have enough Volvos!

14587 posts

Uber Geek


  # 1028062 20-Apr-2014 09:31
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That is really not a home handy man job, and Hot water cylinders can go catastrophically wrong

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The views stated in my posts are my personal views and not that of any other organisation.


There is no planet B




107 posts

Master Geek

  # 1028071 20-Apr-2014 10:15
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its really an electricians job.he can test thermostat to prove its faulty and then change like for like.

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Uber Geek


  # 1028175 20-Apr-2014 15:43
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I know that our HW thermostat is so old that it's in degrees Fahrenheit!


439 posts

Ultimate Geek

  # 1028466 21-Apr-2014 08:46
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Thanks guys, understood on the electrical wiring, I'll need to have a look first to see how its setup I have an external dial on the side of the tank for the temp settings.

3885 posts

Uber Geek


  # 1028592 21-Apr-2014 14:25

Sounds like you have one of the old user adjustable thermostats. If so just rip it out and get a stem thermostat. They should be available almost anywhere that sells electrical or plumbing parts.

439 posts

Ultimate Geek

  # 1031880 27-Apr-2014 09:05
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Thanks guys for all the help I replaced the unit with a standard 11 inch unit water at a good temp now.

What I found was the old unit had a user adjustable dial the thermostat unit looked similar to an ovens with a wire that had a temp probe on the end that was pushed down the thermostat hole on the tank.

The only issue I had was that in the manufactures wisdom the hatch on the side of the tank they designed it to be flat rather raised to allow for easy installation of the new thermostat anyway it's a snug fit but all good.

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