Search the manual for the thermostat troubleshooting section to see if this issue is discussed along with a solution for fixing it. If you don’t have it, search online by the brand and model – whatever information you can locate on the thermostat or inside the cover. The Thermostat is Brokenīefore calling it a lost cause, check the thermostat manual. Blow it out of the thermostat or gently brush it with a soft-bristled, small paint brush to remove the dust. Is the thermostat in a dusty area? Remove the cover to look for dust. If for some reason, you’re trying to set it higher or lower, it won’t change temperature from the low or high setting. Most thermostats have a set range of about 40 to as high as 99 degrees Fahrenheit. The Upper or Lower Temperature Setting Is Reached Occasionally, low battery power will lead to malfunctions in a thermostat including making it so that the thermostat won’t change temperature settings when you want it to. The system would have to be much too big to achieve those kinds of temperatures. A properly sized HVAC system won’t heat your home above 85 or cool it below 55. Why would an installer do this? Because they didn’t want the system to work harder than it should. Many thermostats can be programmed with high or low limits, so once set to that point, the thermostat won’t change temperature any further. The Installer Set High or Low Temperature Limits Sometimes it’s not that easy, and you have to use a thin wire or straightened paperclip to push into the reset hole. The Thermostat Needs to Be Resetĭoes it have a reset button? Try pushing that. You’ll have to switch the mode to Heat or Cool/AC in order to manually override the programmed temperature. You may notice that on the website and mobile apps you can’t make any temporary changes to the current Set Temperature.” Lux says, “If your thermostat is in Auto mode, Heat or Cool modes will be automatically activated within the range of your heating and cooling schedules. This is true, for example, with most Lux smart thermostats. That’s because in Auto mode, the thermostat uses pre-programmed temperature ranges. When you choose Auto mode on some models, you can’t change thermostat temperature. You can always search for the thermostat’s manual online, and it should have instructions on what to do if the thermostat won’t change temperature, starting with trying to unlock it. Similar techniques work for other brands. Press the plus “+” and minus “-“ buttons simultaneously and hold for 3-4 seconds to unlock the thermostat. Then press the Hold button to unlock the thermostat. Press and release the Next button three times. Press the ring a second time, and enter the PIN. Is it time to upgrade your thermostat? Use our thermostat upgrade guide to help you make the right choice for your needs.Press the thermostat’s ring, and the Locked icon will appear. Locate the Installation and User Manualsįor your product and confirm the thermostat is correctly configured for your equipment’s system type and Confirm the thermostat has been correctly configured for your system.The installation guide for your thermostat will show which one you have. On some thermostats, this connection is madeīy a jumper wire connection on other models this connection is made by a slider switch that has 1-wire andĢ-wire settings. Separate wires to R and Rc, these terminals must be connected.
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