Horstmann Economy 7 quartz timer not rotating

4 Apr 2011
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United Kingdom
Hello there,

I recently moved into a new flat and the water heater came with the above timer.

The timer doesnt seem to be working. The clock doesnt rotate at all. Altough I can hear the clock tick. Also the Boost function works fine(I ve been using it to heat up the water).

Am I missing something here.. Do I need to set anything?

Any assistance will be greatly appreciated.


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I have had that with the mechanical Horstmann timers. They go like that if they have been mishandled. It needs a new one.

The electronic version is better.
Thanks for that.. I will look to have it changed. Would you know how much it would cost me(including the labour) to have it changed to electric timer.

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Thanks.. thats really helpful..

Can I do it myself or I need to call in an electrician to fit it in.

Also, I spoke to my electricity provider and they said that the property doesnt have Economy 7 tarrifs. So are there any better/compatible timers available that I could use.

I have the exact same issue with my controller also, the clock doesnt seem to rotate at all although i can get the hot water on no problem..

Can someone confirm if this can be installed by myself or do I require a qualified Electrician to install?

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