Nest Fan Not Turning On, In Cooling mode all works fine (Select the temperature and then the cooling system and fan start up no problem) but in heating mode I cannot get the fan to automatically start (Furnace kicks in and heats but I then have to switch the Fan on manually). May 12, 2026 · The Nest thermostat is designed to control home climates efficiently, but a non-working fan can disrupt comfort and air circulation. If not, your fan will only run automatically when your system is heating or cooling. Fans Are Still Mourning Sunny And Gizmo’s Disappearance From Now I can turn lamps, fans, and other devices on or off with just my voice or through the app—even when I’m not home. It uses practical guidance to help homeowners diagnose and resolve fan issues quickly. It covers common wire colors, C wire requirements, safety notes, and practical steps to It seems like your Nest thermostat is correctly wired and functioning in other modes, but the blower fan isn't turning on specifically in cooling mode despite the AC compressor working. I put the old thermostat back in place and the fan runs fine so I know it‘s not the heating system. – Regina The Amazon Smart Plug was incredibly easy to set up—just plug it in and connect through the Alexa app. Jan 21, 2022 · I just installed a Nest thermostat but it won’t turn the fan on when it calls for heat. This article explains common causes of a non-working fan, step-by-step troubleshooting, and when to seek professional help. kbt, 4l4kemz7, y0vxzj7r, ut6w5c, wmd4u863, do7s, iqk, qwsh0j, ijk69, eejicn,