Why would my Nest Thermostat (Gen 3) say I have no Rh power if my multimeter can detect over 24v? (I do have a common wire too) - Quora
Nest thermostat not seeing the C wire but it's there... | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
![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://preview.redd.it/nest-thermostat-giving-e4-no-power-to-rh-wire-detected-v0-55s1fhrw7t0c1.jpg?width=640&crop=smart&auto=webp&s=d694aa1c3727cd02024b57e1e7f0d52930fc090d)