Honeywell ST6400A Timer

Ani · 18 Aug 2010

This timer runs both the hot water and central heating. After using the heating and hot water one night - and then turning the heating switch back to off - it now puts the heating on every time the hot water only should be on.

Does anyone think this is a fault of the timer or could it be the valve?
Also, had a look and it says this timer is now obsolete and is replaced by another Honeywell equivalent - so will this just plug into the same back plate without rewiring?

If anyone could help etc etc - Thanks

bengasman · 18 Aug 2010

Fault could be either.

Ani · 18 Aug 2010

Ani";p="1706595 said:
This timer runs both the hot water and central heating. After using the heating and hot water one night - and then turning the heating switch back to off - it now puts the heating on every time the hot water only should be on.

Does anyone think this is a fault of the timer or could it be the valve?
Also, had a look and it says this timer is now obsolete and is replaced by another Honeywell equivalent - so will this just plug into the same back plate without rewiring?

If anyone could help etc etc - Thanks

PS - Oil fired boiler etc

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Honeywell ST6400A Timer

Ani

bengasman

Ani

DIYnot Local

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