My Danfoss tp5000si display has all of a sudden stopped displaying the time and intstead shows only 2 dots flashing where the time normally is and also the temperature, which when i first looked was down at 5c. I moved to temp upto normal 20c and it switched on and the heating came on as normal. But it seems to be switching on and off very quicklky. I have tried all the resets from the manual and nothing happens. Tried the batteries also nothing happened. I have 2 of these thermostats in our 3 story house and the upstairs 1 is working normal, although i did recently change the lower temperature up a little bit. Will this have an affect? Any ideas?