Screwed Up Nest Wiring


  #1  
Old 09-05-17, 06:48 PM
V
Member
Thread Starter
Join Date: Sep 2017
Location: USA
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
Screwed Up Nest Wiring

So some idiot installed my nest wrong(me). And I've since thrown away the previous honeywell thermostat. I installed the nest in June and the fan and air conditioning have both worked great since installation but I have no heat. I fiddled with the wiring per the nest diagram but really have no idea what I'm doing wrong or how to fix it. When I set the nest to turn on heat, the fan blows but NO heat at all. Im including pictures of the nest wiring and the wiring inside the air handler. It is a Rheem classic series. It is an older unit so I guess its possible that something else has gone wrong with the Rheem unit since I installed the Nest. Any suggestions would be extremely helpful.
 
Attached Images      
  #2  
Old 09-05-17, 07:13 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,451
Received 4,051 Upvotes on 3,634 Posts
Welcome to the forums.

These wires look normal..... just confirm on the stat ....
W1 = white
R = red
G = green
C = black
Y1 = yellow.

I see some possible problems at the air handler. You didn't mention changing the wires there. I need to see the screw connectors inside the red circle. Do you have a split A/C system with electric re-heat or do you have a heat pump system with electric re-heat ?

I need to see wire on circled connection block.
 
Attached Images  
  #3  
Old 09-05-17, 07:52 PM
V
Member
Thread Starter
Join Date: Sep 2017
Location: USA
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
These wires look normal..... just confirm on the stat ....
W1 = white
R = red
G = green
C = black(This is actually brown black was not hooked up on previous thermostat so it is not hooked up now)
Y1 = yellow.
The others are confirmed correct.
I see some possible problems at the air handler. You didn't mention changing the wires there. No wires changed here but I thought it may give insight to the problem. I need to see the screw connectors inside the red circle. Do you have a split A/C system with electric re-heat or do you have a heat pump system with electric re-heat I know the is terrible but im not sure I think its a heat pump but not sure how to tell but can investigate if needed?

I need to see wire on circled connection block. Picture Attached.
 
Attached Images   
  #4  
Old 09-05-17, 08:11 PM
V
Member
Thread Starter
Join Date: Sep 2017
Location: USA
Posts: 3
Upvotes: 0
Received 0 Upvotes on 0 Posts
Further Info

Just to be clear there are Blue, Black, Pink, and Orange wires at the thermostat that are not hooked up. It was advised that I should take a picture of the original thermostat connections but it seemed so simple to do at the time hindsight is 20/20
 
  #5  
Old 09-05-17, 08:55 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,451
Received 4,051 Upvotes on 3,634 Posts
Ok...pics are good but can't quite see the letters. Just fill them in for me.
blue = B
brown = ?
red = ?

I'm leaning towards a heat pump. If I'm correct...there needs to be a change at the nest.
If it was a heat pump system.... the outside condensor unit would run in the winter.
 
  #6  
Old 09-06-17, 05:52 AM
A
Member
Join Date: Jun 2012
Location: USA
Posts: 1,499
Received 92 Upvotes on 84 Posts
From the board's part number the terminals are B, ODD, C, R - https://www.repairclinic.com/PartDet...434002/2638596

So at the Nest the Blue should go to the O/B terminal and then tell Nest that it is a B
https://nest.com/support/article/My-...-to-be-heating
Also - the white makes more sense to go to the W2/AUX terminal as it is for the auxiliary heat strips.
 
  #7  
Old 09-06-17, 11:26 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,451
Received 4,051 Upvotes on 3,634 Posts
Since the brown wire is connected to C at the air handler... make use of it at the stat.

W2/AUX = white
R = red
G = green
C = brown
Y1 = yellow
O/B = blue
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: