Boiler working but central heating will not come on

[Rms1]

Hi,

I would just like some advice before I might have to call out a company.

I have recently moved house.

The house has a Horstmann DRT2 thermostat. The thermostat has power (I have put new batteries in). When the thermostat gets to the temperature that the heating should come on, I hear a click but it does not fire up the boiler.

The boiler is working as the hot water is coming on.

The boiler is on a timer via a Landis and Staefa control panel. I have checked all the timings and it is set so the heating should come on between 0600-2300pm, which is the times I am in the house and the heating is not coming on.

I would really appreciate any suggestions as to what the problem may be.

Thank you in advance,
Rachel

 

[picasso]

Does a small flame symbol come up on the screen when you hear the click ?

 

[Rms1]

Hi,

yes the flame symbol is appearing

Thanks for any advice

 

[picasso]

check the boiler is set to heating and hot water and the ch stat (on the boiler) is turned up.

 

[Rms1]

It is a glowworm energy saver boiler and doesn't have a button that allows me just to choose hot water or central heating (my old boiler had this). The thermostat on the boiler is set to a high temperature.

The electronic timer attached to the boiler is set to come on at 0600 and basically go off at 11pm. I wonder if this electronic timer is the problem but it is allowing the hot water to come on (it has just come on as I type, the boiler has fired up fine for the hot water).

Does it sound like a problem with the thermostat I have in the lounge for the centre heating (the horstmann one?). I have read somewhere the relays on these can fail, but I am not sure this is the case if i am hearing a clicking sound and if the heating symbol has appeared on the LCD.

Thank you

 

[picasso]

I assumed you had a combi, try putting the ch timer on constant as your thermostat is programmable, failing that you might have a faulty zone valve, assuming you have zone valves.

 

[Rms1]

Have put the programmer onto constant but nothing seems to happen. Again, I can hear a click in the programmer on the boiler when I turn it to constant, but the boiler doesn't turn on.

I am not sure about the zone valve.

Thanks for your time in helping me try and sort out the problem. Will call somebody out, at least I have tried a few things to make sure it is not me being stupid.

Thanks again.

 

[Armo74]

Sounds like a faulty zone valve motor.