I have a Confort Zone II system (from Carrier) installed at home.
Sensors are always reading 28ºC.

In the same room I have the thermostat of the heating system and this is working, when I switch on the HVAC, this thermostat shows the temperature going down from 30º to 26º, but machine never stops !!! because HVAC thermostat is always showing 28ºC.

What can be wrong here ??

Thank you!!

(sorry if my english is not perfect)