Central heating system not turning off/on with timer.


Postby Amanda2801 » Fri Nov 23, 2007 8:38 pm

[b]My central heating system won't turn on or off with the timer. The valve has been replaced, and the cylinder thermostat replaced. Heating/water only works when the main power switch is turned on/off manually.The timer switch is working but not communicating witht the heating system? Any ideas? :?:
Amanda [/b]
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Postby htg engineer » Fri Nov 23, 2007 10:31 pm

The timer switch is working ? do you mean you can turn heating on and off by the timer, but when set to timed it will not turn heating/water on or off ?

If yes then you need to replace timer.
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Postby marrtin » Fri Nov 23, 2007 11:36 pm

Have you checked if a frost stat is over-riding the timer?
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Postby Amanda2801 » Sat Nov 24, 2007 8:41 am

The timer displays all times etc, but heating/water does not go on and off with set times, it has to be manually switched on/off with main power switch. Thanks for reply
Amanda
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Postby marrtin » Mon Nov 26, 2007 9:31 am

IF the boiler always fires when the timer is in the off position, then either the timer itself is faulty, or a frost stat is set too high (or it's doing what it's supposed to if the boiler is in an outhouse or garage etc).
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Postby carol donegan » Wed Nov 28, 2007 9:50 pm

my heating comes on outside of the times set. the boiler and frost stat is in the garage.i've had a new timer put on but i still have the same problem. why is this?
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