NO POWER RH WIRE NOT DETECTED

[Teelove62]

New HVAC Unit installed. Shorty after the thermostat shut down the unit shut down . The message read, NO POWER RH WIRE NOT DETECTED 

[Andhanni]

This sounds like a HVAC question for the company that installed the unit.

I would not be surprised if the cable is loss on the HVAC side if thr thermostat did not change from the old unit.

[Patrick_Caezza]

There are several safety features built into HVAC systems that will remove power from the R wires (this includes Rc and Rh wires)

Check all of the panels on the furnace/air handler and make sure they are fully and correctly installed, these panels have a safety switch.

Check that the filter is installed correctly and its access panel is properly closed. Again, there is a safety switch.

Check the overflow, consider drain and make sure it's not plugged. It has a water level switch to stop it from overflowing.

Check the thermostat cable on each end and make sure that nothing has come lose.

[JenniferV]

Hey there,

Thanks for the help here, Andhanni and Patrick_Caezza.

Teelove62, hope that helps, but if you're still having trouble with your Nest Thermostat, please provide us a clear picture of the wiring set up on your old and current thermostat. Also, please provide the power reading on your Nest Thermostat.

Best,

Jennifer

[EmersonB]

Hi Teelove62,

I'm dropping by to ensure that everything is covered here. If you have other questions and concerns, feel free to let me know.

@JenniferV appreciate your helpful response.

Regards,
Emerson

[Princesss]

Hi there,

Due to inactivity, I'll go ahead and lock this thread in 24 hours. Feel free to start a new thread if you need assistance with your Nest Thermostat and we'd be glad to assist you further.
 

Best,

Princess