Help please! Dan Foss TP4000 series thermostat

[17thCOffice]

Hi. I'm hoping for some advice. We have a very ancient thermostat for our radiators in a very old building.

This morning there was no heat and the display was blank, so I've changed the batteries and reset, but I can't change the time to allow the program buttons to work.

After the reset, I get 3 displays in succession. The first says 03:00 Sr, then it quickly moves to 11:00:00 (but it won't let me change this, even if I press + or the up arrow really quickly). It moves on again very quickly to the 3rd display which just has a flashing colon, like the one in the middle of a time display but doesn't show any numbers and won't allow me to add numbers by pressing any of the buttons.

I have managed to change the temperature so the heating has come on but I won't be able to program until I can set the time. Watching the YouTube video Getting Smart with Dad didn't help and ringing DanFoss customer service didn't either. Are there any experts out there please? Thank you

 

[Deleted member 120897]

Could just be knackered. Does it have a button cell battery?

 

[17thCOffice]

Could just be knackered. Does it have a button cell battery?

We know how that feels! No, it works on 2 x AA, replaced this morning.

 

[Deleted member 120897]

Have you tried both resets?

 

[17thCOffice]

Have you tried both resets?

Yes, we've done all of this.

 

[Deleted member 120897]

If none of my fellow forum members can help, it might just be time for a new one. Nothing I’ve seen/encountered before.

 

[17thCOffice]

If none of my fellow forum members can help, it might just be time for a new one. Nothing I’ve seen/encountered before.

Thanks for trying!