On 07/01/2013 11:36, Chris wrote:
Hi,

I have a Baxi 80 HE plus which firstly works fine for the hot water system.

However for the central heating several times a week, the Central
heating does not come on as per timer controls. Although the lights on
the timer control light up as expected when the timer is set to swich
the heating on, the boiler does not fire.

However with several goes at switching the timer control on and off e.g.
clicking advance or boost and pressing the reset button on the boiler ,
the Central heating will eventually fire up ( 2 green lights) and stay
on until the timer control switches it off later in the evening.

There are no red fault lights showing on the boiler when it doesn't
fire- in fact when it doesn't fire up there are no green lights either
showing on the boiler.

The pressurised system is just over 1 bar.

Any ideas if this is more likely to be a timing control (Drayton Tempus
7) which I could easily get replaced or a boiler problem ( lots of money)!

Thanks for any help

Chris



Are there any motorised valves in the system? If so, you could have a
problem with one of those. Assuming that your boiler isn't a combi (I'm
not familiar with the model, so I don't know) you may have a motorised
valve for each heating and hot water zone. If it's an S-Plan system, the
timer/room stat will control the valve and the valve will switch the
boiler on when it's open. So if the valve doesn't open, or if it does
open but its auxiliary switches don't work, you'll get no heating.

Could this be your problem?
--
Cheers,
Roger
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