Nest thermostat N72 code, Rh detected, No connection to equipment

[Jaz60crna]

Nest thermostat N72 code, Rh detected, No connection to equipment....

Was working fine...then .lost half my main breaker..seemed intermittent..lightening strike near road..blew fuse on air handler...replaced main breaker by electrician ....and hvav fuse by hvac tech....now get this error code.....could it be issue with transformer  near furnace?....can't check ac.now ..below 60 degrees..hope for Indian summer..but seems heat works...replaced base plate. Same issue...nest to send another..but thought..could it be transformer???

[Patrick_Caezza]

Have you checked the fuse on the control board in the furnace/air handler?

[Jaz60crna]

second floor learning nest controls ac and 1 zone heat...found blown fuse in air handler.. changed but still get error..too cold to ck ac now..below 60.....thought Rh controlled by furnace transformer that controls zones..but seems to be working despite error code of sensesed on thermostat  but not connected to equipment N 72...maintaining charge..common wire from air handler....was thinking of changing  heat transformer near furnace.. but also thought might just ignore code???   Thoughts ???

[Jaz60crna]

 pic on my app

[Jeff]

Hi Jaz60crna,

I just wanted to jump in real fast to see if you saw Patrick_Caezza's latest reply and to see if you still needed some help on this or if you were able to get it sorted out. If you are still needing some help, just let us know and we'll be happy to continue helping.

Thanks,
Jeff

[Jaz60crna]

Yes.. thank you..I did a factory reset..no change.... why would it show all wires connected in the app..but on the thermostat it says rh not connected to equipment..and the rh wire is  grayed out like it's not connected..but seems to be working???..should I just ignore the thermostat  message...I was sent a replacement.  But afraid to change it since I do seem to be able to get heat upstairs

[Jeff]

Hey Jaz60crna,

One thing you could try is just reseating the cables to make sure they have a good connection. It's possible the connection isn't very good and it's not registering. Maybe give that a quick look and see if all looks well there.

Thanks,

Jeff

[Jeff]

Hi Jaz60crna,

I just wanted to check in real fast to see if you saw my reply and to find out if you still needed any help on this. If you're still needing assistance, please just let me know and I'll be happy to continue helping.

Thanks,
Jeff

[Jeff]

Hi everyone,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

Thanks,
Jeff

[Jaz60crna]

 app looks like rh connected. But thermostat says it's not..but heat seems to be working.. any ideas????? Thank you in advance

[Jaz60crna]

 why does it look connected on app but not thermostat?

 

[Patrick_Caezza · Accepted solution]

Try doing a reset to factory defaults on the thermostat and set it up again.