Potterton programmer malfunction? Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[bergerland]

Hi,
I have a Potterton EP3002 programmer, about 10 years old.
I am finding that the Central Heating is switching on when I have set the progranmmer to HW only. The only way to stop CH switching on is to turn off each radiator valve.

Any advice please?

[stoneyboy]

bergerland,
Most likely that you have a motorised valve in the system and this is stuck on CH - time for a search.
end

[benbob]

Ep timers are pants, could well be it is gone.
If it needs replacing, buy another brand like Honeywell or Danfoss.
Get a model that allows for totally separate times for ch and dhw.