Hey,

My programmer (potterton) has been set for my hot water and heating to come on for a few hours each morning and evening. But my (potterton) boiler seems to be ignoring my programmers times and firing up both on the hot water and central heating non stop. It isnt always firing, the bolier comes on and goes off, almost randomly it seems, but ignoring the programmed times.

The programmers red LED lights come on and it makes a click noise at the exact right times.

The only way to stop the boiler is to switch of the bolier plug.

Recently had the thermostat replaced and keep this low to try to keep the boiler off but unless its on zilch, the bolier still comes on at unwanted times.

There is a thermo on the boiler which is also down as low as it can be to allow the boiler to come on at least at the requested times (any lower and it doesnt come on at all)

It just seems that the three aren't listening to each other.

Any ideas? thanks Lauren

Lauren, March 2011

I have the same problem. I now have had a thermostat fitted in the house and a new programer and a new frost stat as the boiler is in the garage.my plumber user a honeywell y9420 sundia rf wireless which save a lot of work but now it is all done the boiler is still coming on even when the programmer is on auto and everything should be of.I now have the boiler on a timer so it only gets power when the programmer comes on but the winter is coming and will have to plug it back in without the timer so the pipes don't freeze. any ideas any one please.cheers

karl, October 2011

sounds as if the divertor valve (it's usually in the cylinder cupboard ) is faulty

brian, March 2011