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Thanks Madrab. No i got timer schedules for them but after screen getting blank both lights were switched on strangely. Is it any indication of low battery if it uses any or any key to switch on the screen which i am missing? So if the reset doesn't work i need to replace the whole unit ...

I havent tried that as currently programmer is running as per schedule. So not sure about resetting it as issue looks to be with blank screen only.

Hi, Have an issue with a Danfoss Programmer - the LCD display goes blank and the HW and CH is permanently on as per the red lights being on! Not sure if it is broken or needs replacement. Any advice will be great Model number could be Danfoss tp9000 (not sure) Attached pic for reference