There is not enough power available. Increase heating set point to 10 degrees above room temperature. Carrier Thermostat Troubleshooting - I have a Carrier thermostat with an internittent problem that recently has started to oscillate between off, cool, and heat, seemingly randomly. Select COOL mode. Check the thermostat's display to confirm that there's a call for cooling, usually indicated by the words "cool on" or a snowflake icon. If the outdoor temperature is above this setting the thermostat will not engage free cooling even if the indoor temperature is … Another sign is if the indoor-unit turns on but there is no warm or cool air coming out of the vents. Check for 24vac at Y (first-stage) terminal. Double check wiring and check for 24vac between R and C. E2 will clear 15 sec after proper voltage is restored. If both Humidifi- cation and Dehumidification have been set to OF, the humidity value will be shown as when viewed from the humidity menu, but no E5 will be shown in the display. A smart thermostat can help you save up to 23 percent in annual heating and cooling energy costs, and track energy use for a better understanding of how much you spend. Press the HOLD button to resume normal system operation. If the heat pump is not working properly, you can manually turn on the emergency heat for extra help in healing. Carrier listened to the needs of homeowners nationwide and delivered a product to meet those needs. This is probably one of the most alarming yet more common thermostat problems. Set desired temperature to 10‘F above room temperature. The thermostat also displays the outside temperature on the screen just under the indoor temperature it’s reporting. Simultaneously press the Up Arrow and Fan buttons together (increase temperature). If the NUI does not receive CCN communication data from the CDU for 60 seconds, the display will show"E3" error code in the Temperature display zone and '-'in the Time Display zone. This is to remind the homeowner to "check" filter. Terminal R must be connected for proper thermostat operation. 2. Carrier thermostats can be troubleshooted by looking for common problems and addressing these problems one at a time until the problem is fixed. An internal power source eliminates the need to reprogram the thermostat after power outages. If that's not the case, then try the following steps: 1. It is displayed when your system is operating on auxiliary heat. If this is the case, the system may need servicing if it doesn't blow warm air. "E3" error code will be displayed and the other functionality will remain same. You want to avoid using emergency heat, though, because it’s the most expensive option. Brownout condition or too low of voltage to thermostat. Cooling may be locked out. If not present, replace thermostat. This diagram from Carson Dunlop shows another easy method for testing airflow. If the thermostat is defective, the thermostat may not cool properly. NOTE: This indicator does not reflect a problem with your system. For your convenience, they are present in the form of tables: they enlist the most widespread technical issues and provide detailed instructions for fixing the problems manually or via WiFi connection. Thanks for taking the time to watch our videos. The Carrier® Côr™ thermostat is Energy Star® certified and claims to save you 20% over average heating and cooling. Some Carrier thermostat systems also come with a “Constant ON” feature. you will see AUX HEAT indicator in the display. If present, thermostat is operating correctly and problem is with wiring or equipment. The Nest thermostat was designed with simplicity in mind. If the display module and the equipment control module cannot communicate via two-wire connection, El will be displayed, If control cannot properly read outdoor temperature, and it is needed for proper operation, the display will indicate ” in the outdoor temperature location, If internal memory fails, E4 will be displayed. The result is a thermostat that interacts with people as effectively as it does with your heating and cooling system. of course, if you suspect a problem with your heal pump, call your heating and cooling dealer immediately. Decrease the cooling setpoint to 10 degrees below room temperature. There is not enough power available. What should you do if the airflow is too low?First, check your air filters. No heating nor cooling). The replacement is 3 degrees off too high. Heating will not come on Something as simple as someone … The HOLD indicator reminds you that your thermostat's comfort schedule has been overridden. When controlling a heat pump, heat comes on during cooling cycle. View and Download Carrier Thermostat installation, start-up, and operating instructions manual online. When using 4 wires (R,G,W,Y), the cooling equipment tries repeatedly to turn on, but can- not. When your heating or cooling goes out, the problem could be your thermostat, rather than your furnace or air conditioner. Check for 24vac at Y (first-stage) terminal (with heat pump) or W/W1 (with air conditioner) terminal. If 24 vac is not present, replace the thermostat. Select COOL mode. If not present, replace thermostat. If a Carrier thermostat is not cooling, owners should make sure that the thermostat is set to cooling mode and to a temperature that is lower than the temperature outside. What Are the Steps of Presidential Impeachment? The clock will run for 72 hours, You have a system error message. Cooling will not come on: Select COOL mode. The edge thermostat will not work correctly with the carrier ductless split systems. Nest. You’ll know there’s a problem if the house can’t seem to get warm when it’s cold outside. On my Carrier Thermostat the "cool on" is blinking off and on, but the outside unit will not work. Check for 24 vac at W1/ O/B terminal. 2012-05-21 azadara The ductless split units use a wireless stat that comes with the unit. When using 4 wires (R,G,W,Y), the heating equipment tries repeatedly to turn on, but can- not. Get free quotes on Nest and Carrier today! To allow for greater comfort, a 2-stage thermostat control is recommended when zone systems are used. This is no ordinary thermostat. There is a bit of air coming out of inside vents, but the temperature is not cooling to correct level. Before you call Carrier technical support or take apart your thermostat, take a look at the unit. 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