My Hot Water Works? But not the Centeral Heating?

Sorry Guys!
Its an Ideal Classic LXFF & FF

Steve
January 2010

I am an unqualified muppet with respect to boilers so my opinion is worthless...

You do not mention the make & model of your boiler which does not help diagnosis much. Assuming it's not a combi - then, when the boiler runs (for hot water say) the pump should also run - if the pump were bad the overheat cutout would trip - and it isn't tripping so you can assume a good pump.

Both bigalec and erj suggest the motorised valve - it looks something like this...

http://www.toolstation.com/images/library/stock/webbig/85125.jpg

and has a manual lever you can see in the picture - sometimes they get stuck in the wrong position.

You say the room thermostat clicks at 8 deg C suggesting it's asking the boiler to run - providing the timer programmer is also asking for heat then the boiler should fire up and heat the radiators - or the hot water tank if the valve is in the wrong position - but that's not happening - the boiler is not firing for C/H so it may not be the motorised valve.

The key question is - is the boiler "seeing" a request for heat from the timer/programmer room/stat circuit - either might be defective and causing the symptoms you have.

If your boiler is a combi then this answer should be ignored. It should probably be ignored anyway.

Good luck...

Peccavi
January 2010

One of my radiators is getting warm? but still none of the other radiators? I have bleed radiators in sequence.
The boiler is not igniting either, with thermostat indicator clicks at 8ºc, no igination on boiler still.

Hot water works fine!

Steve
January 2010

need a bit more info, but could be zone valve as Bigalec says or could be the pump.

erj
January 2010

possible motorised valve problem.

bigalec
January 2010