N72 No Power To Rh
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What do rc and rh mean on the thermostat? The rc terminal on the thermostat is the 24 volt cooling power supply. In comparison, the rh terminal is the 24 volt heating power supply. One such case with nest thermostat is nest has no power to rh wire.
This issue is also commonly referred to as error codes e74 and n72. You'll encounter these codes when the rh wire is receiving low power. Here's how you troubleshoot this issue: 5) twist together blue (c) from ac with red (old heat rh) and add a 3rd blue color wire splice with tiny wirenut, tuck behind nest base. 8) reconnect y, g , rc. Check for loose wires. Power can't flow if connections are not secure. Reconnect all loose wires. Loose wires other than the rh wire can also cause that power doesn't go to the rh wire.
Nest 3rd gen thermostat N72 Error Does not detect Power from Rh wire - Home Improvement Stack
I have a nest and am getting the e73 error saying no power to the rh wire, had it installed a
Nest- no power to Rh with common connected - DoItYourself.com Community Forums
Nest – No Power to RH or RC wire detected – InfoSec Monkey
E74-No Power to RH Wire on Nest Thermostat (Solved) | MashTips
E74-No Power to RH Wire on Nest Thermostat (Solved) | MashTips
How to repair "No power to Rh wire detected." error due to a condensate drain line clog - hapscout
AC worked but now that we've changed over to heat, it says no power to the Rh wire. Any ideas
No Power To Rh Wire
No Power To Rh Wire
