My Potterton EP2 central heating time switch has come up with a classic problem now. CH settings fine and all work ok but the HW setting for ON/Off 3 will not allow me to go past 3.30 pm off time? Originally set at 4.20 pm and after a few years use wanted to change it to 3.30 pm but once set cannot change it again to later on in the evening?
Yes have used the reset button and also taken it off any power with the 3.0 volt battery taken out overnight and does exactly the same thing again. Have taken the unit completely apart down to pcb level which is actually well built for a change.
The main microprocessor chip is completely hidden deliberately with black epoxy so cannot check up on the type used? Suspect it is actually a faulty batch of chips with a bug deeply embedded inside that of course cannot be changed.
Suspect the company knows this as with my own electronics company you never admit to a fault or everybody wants a replacement I was told. BMW play the same game until the papers get hold of the storey.
It did cost me £66.00 but now it is closer to £90.00 anybody else recently had this known problem reappear with later version pcb's as I don't want to fork out more money for exactly the same problem to occur.
Yes have used the reset button and also taken it off any power with the 3.0 volt battery taken out overnight and does exactly the same thing again. Have taken the unit completely apart down to pcb level which is actually well built for a change.
The main microprocessor chip is completely hidden deliberately with black epoxy so cannot check up on the type used? Suspect it is actually a faulty batch of chips with a bug deeply embedded inside that of course cannot be changed.
Suspect the company knows this as with my own electronics company you never admit to a fault or everybody wants a replacement I was told. BMW play the same game until the papers get hold of the storey.
It did cost me £66.00 but now it is closer to £90.00 anybody else recently had this known problem reappear with later version pcb's as I don't want to fork out more money for exactly the same problem to occur.
