If this is the problem, be sure to have a professional install the new one, as newer thermostats can be complicated and you don’t want to have issues in the future. Therefore, if your thermostat has been around a while, has a blank screen, and isn’t working, it may be time for a replacement. Though the average thermostat has a life expectancy of about 10 years, they do wear out. Ensure your furnace door is closed securely and see if that fixes the problem. Some thermostats, particularly Honeywell thermostats, are programmed to shut off entirely if a furnace door is open. If you don’t have an electrical background, we don’t recommend attempting to fix loose connections or wiring problems yourself leave it to the professionals! 6. Additionally, rodents in attics might have chewed on the wires and caused issues. If the thermostat is in a high-traffic room, the vibrations from people walking by can sometimes affect the wires. If you recently had your thermostat installed or installed it yourself, the wires might not be firmly attached. Your thermostat has many electrical connections that serve various functions from the screen display to allow your thermostat to communicate with your HVAC system. For your furnace, you will need to call in a professional for a diagnosis and repair. If you notice that the sensor has gone off when you check the safety switch, contact an HVAC professional to inspect your AC. The safety switch works to detect hazardous problems like excess moisture or high temperatures within your system and prompts the entire system (thermostat included) to turn off before damages occur. For your air conditioning system, start by checking the safety switch, which is installed in the drain pan. HVAC systems have built-in safety switches in the case of an unsafe situation. Sometimes, an issue with your HVAC system can cause the transformer to stop sending voltage to run the thermostat. Then check if this restores the thermostat screen. If the breaker has tripped, simply flip the switch back to reset the circuit. This will shut off power to your thermostat and if there’s no battery backup, the screen will go blank. Sometimes, the thermostat or another electrical device can cause the breaker to trip or blow a fuse. Most thermostats are connected to a home’s main electrical system. Some thermostats will also automatically adjust their screen’s brightness level when there is too much light in the room to save battery power. If your thermostat allows you to change the brightness level, check that the brightness isn’t turned down. Most thermostats display a low-battery symbol when the juice is running low. Replace the batteries and see if your thermostat turns back on. Chances are, the batteries have died and the thermostat simply can’t power on. If your thermostat is blank, the first thing you should do is check the batteries. If your thermostat wall does not have a C-wire, or common wire, your thermostat most likely is not hooked up to your HVAC system for its power and needs batteries to operate. The Thermostat Batteries Died and Need to be Replaced The heating and cooling experts at Design Aire are here to help! Here are some of the most common reasons why a thermostat screen might be blank: 1. Most of the time, a blank thermostat screen can be easily fixed if you can find out what caused it. Does it mean your furnace or air conditioning is broken? Not necessarily. If your thermostat has gone blank or turns on momentarily before it turns off again, you may be concerned. Your thermostat is a small but important device that controls the temperature in your home.
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