Potterton Suprima 80L with Honeywell Smartfit programmer

Joined
1 Jun 2010
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Location
Surrey
Country
United Kingdom
:eek:
The above heating & hot water is not programmed to come on in the night BUT between 2am - 5am the valve opens, the boiler fires up then shuts down again and again. If you look at the programmer it registers nothing. The 2 slide bars for CH & HW when tuned OFF - do not stop the boiler firing up again and again.
Only shutting off the electricity to the system.
Can anyone help? PLEASE?
 
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2pm - 5pm is afternoon and not the night!

Is the boiler fitted in an outhouse or garage?
 
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Well those times are in the afternoon!

You must mean 2am - 5am!

Its difficult for me to guess whats wrong. There could be all sorts of causes.

Perhaps water leaking onto an MV switch?

You will probably need a competent engineer.

Tony
 
The OP at first said pm but later edited her post.

You can see the edit details.

Tony
 

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