![Adding New External 24v Transformer to Nest with separate Rh and Rc wires - Home Improvement Stack Exchange Adding New External 24v Transformer to Nest with separate Rh and Rc wires - Home Improvement Stack Exchange](https://i.stack.imgur.com/CTJZ1.jpg)
Adding New External 24v Transformer to Nest with separate Rh and Rc wires - Home Improvement Stack Exchange
![Nest thermostat suddenly stopped working after 5 years: "No power to Rh wire." How do I fix this? Thank you. : r/Nest Nest thermostat suddenly stopped working after 5 years: "No power to Rh wire." How do I fix this? Thank you. : r/Nest](https://i.redd.it/nest-thermostat-suddenly-stopped-working-after-5-years-no-v0-jcv7mca4xu3c1.jpg?width=2252&format=pjpg&auto=webp&s=7e95e0b43066bb32c21c6d81d9d55c92071c0503)
Nest thermostat suddenly stopped working after 5 years: "No power to Rh wire." How do I fix this? Thank you. : r/Nest
![Nest Learning Thermostat: Installation, battery issues, and the importance of the "C" wire : Caffeinated Bitstream Nest Learning Thermostat: Installation, battery issues, and the importance of the "C" wire : Caffeinated Bitstream](https://cafbit.com/resource/nest/nestwiring-large.jpg)
Nest Learning Thermostat: Installation, battery issues, and the importance of the "C" wire : Caffeinated Bitstream
![Nest thermostat giving E4, no power to RH wire detected error and HVAC unit has slow blinking amber light. : r/hvacadvice Nest thermostat giving E4, no power to RH wire detected error and HVAC unit has slow blinking amber light. : r/hvacadvice](https://i.redd.it/nest-thermostat-giving-e4-no-power-to-rh-wire-detected-v0-55s1fhrw7t0c1.jpg?width=3024&format=pjpg&auto=webp&s=d7a10c57a7163f88e350b5ccc0772286abbbd549)