Bit of Nest history. Usually the issue is contained to the cooling side. We’re here to help. ~~and finally~~ I have a Nest thermostat and it appears to be working fine. Diagnose bad sensors as possible cause. Select Add product. Tap Add product on the home screen and follow the app instructions. 01-01-2018, 07:41 AM #3 donmerch One possible solution for the rc wire nit providing power to your nest thermostat. 4 of my 5 cameras automatically went back online and the last camera had to be manually added back to the WiFi again to get it to go online. Follow the app instructions. Test. When this happens, your thermostat will display an E3 During the hot summer months, if your heating and cooling (HVAC) system breaks down it may stop sending power to your Google Nest Thermostat. Update 5: All my cameras are back online and Nest has updated the status of “partial outage” to “ok”. @CA_in_TO @googlenesthelp I cannot access any of my Nest or Google devices at home. Open the Nest app. The Nest devices won't connect and my Google Mac Hub just keeps saying encountered a problem and to try again. Learn more > Nest.com has moved to the Google Store. Update 4: Nest now acknowledging a "partial outage" via their System Outage page. -Check all the wires and their connections making sure they are properly secure at the Nest and on the unit.-Check continuity of all wires from Nest to unit-power off.-Remove C wire, nut it off so it doesn't touch any other wires, flip breaker back on.-Remove Nest, try charging it with usb cable on computer. So that wouldn't be my first guess. ... My nest thermostat is saying there is no power to the Rh wire even though I know that there is because the old basic thermostat works just fine. Remove Rh and G and connect them together with a wire nut or simply twisting together. Heater blowing but cold air no heat. Talk to a Google Nest expert. Nest often has a sub base issue. When this happens your system stops sending power to your Nest Thermostat and causes … If the Nest is losing power from Rh, it would make me think that the furnace isn't outputting power anymore on the 24V system. My new Nest Thermostat Says E74 No power to Rh wire detected, but there is power. I reset my router and am able to access the internet but not my home network of Google devise. Discover connected home devices from Nest – thermostats, indoor and outdoor security cameras, smoke and carbon monoxide alarm, security system, video doorbell and more. I'd more lean towards an issue with the furnace not liking generator power, or somehow it's not resetting and coming back on when the generator comes back on. If you don’t have other products in the app. If you have other products in the Nest app Tap Settings in the top right. Rh is power input for the heating side. My upstairs HVAC is not heating or cooling. 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