Help Danfoss TP9000 programmable room thermostat

Robbiew86

Help with Danfoss TP9000 programmable room thermostat. I moved into a property with one of these fitted almost a year ago. I have the instructions and have tryed all sorts of combinations to solve my issue to no avail. Basically the heating comes on at the programmed time but if the temperature is ok it shouldnt come on. But you can hear it come on many times throughout the day but it shouldnt need to. It comes on for approx 10 seconds then switches itself off. Almost like it started up only to see if the temperature needs topped up then when it realises its already temperature it switches off. It does this every 5 minutes or so all day everyday during programmed times. The heating works fine if its cold, it will warm the place up lovely but just dont see why its forever on and off when it dosent need to be. Ive changed the temperature sensor in the living room but hasnt made a difference.

Please help

Rob

Browntoa

It's probably the boiler pre heat hot water setting starting the boiler up

What make model boiler ?

Robbiew86

Its a potterton promax sl. The danfoss clicks and then the boiler starts every 5 minutes