I belive my potterton ep2001 programmer is nackered as it will only put the central heating on twice a day no matter what selection i have i.e constant. I do have a thermostat switch which in the past has allowed me to have the programer on constant and i have been able to control the heating from that However it now has no effect and the potterton seems to be stuck on a preset auto setting. Is there anyway i can test the programer to see if it is that or my thermostat switch(british gas PT5) which is at fault

John Leadley, March 2008

if the heating is on at the clock [ the red light is on ] the heating should come on and off with the use of the room thermostat as that takes priority....... if u are having probs with the clock hold down the + and - buttons together for 10 seconds this will reset the clock back to the factory settings

matt the boiler man, March 2008