Make sure the temperature is set warmer than the current indoor temperature. If it isn’t, your system won’t know to provide heating. Ensure your furnace’s power is on. Try turning the fan to ON using the fan switch on the control or thermostat to test for power to the furnace. Troubleshooting Broken Thermostats The main connection between the air conditioning and . There comes a time when the thermostat has a problem or the end user wants to . right now mean that a few hours without heat drops the temp inside pretty drastically. . I have a Carrier HVAC unit with digital thermostat. Sep 20, 2012 – Another potential cause is a thermostat that isn’t set properly. Lower the thermostat by five degrees and see if it kicks on. If not, the problem is . A new 3-ton Carrier air conditioning unit was installed in our newly constructed home in October 2008. . Okay we’re fine with it just nice to have air. . Back to the noise issues: We had Expert Heating & Cooling come back to our house a . system brands and allows homeowners to control their thermostat from anywhere . Carrier Thermostats for Carrier HVAC Systems. . This versatile and beautiful programmable Edge thermostat has a slim, wall-hugging design and can manage . Environmental Systems Associates offer Carrier Thermostats. . Features like Ideal Away™ let the thermostat intelligently adapt beyond manual programming for greater . This versatile and beautiful programmable Edge thermostat has a slim, .