5-Wire Thermostat replacement for Carrier 58PAV070 (-12)

Reply

  #1  
Old 12-10-13, 02:37 PM
Member
Thread Starter
Join Date: Dec 2013
Posts: 3
Upvotes: 0
Received 0 Votes on 0 Posts
5-Wire Thermostat replacement for Carrier 58PAV070 (-12)

I recently had to replace my t-stat for the heating unit: Carrier 58PAV070.
I removed and replaced the old one (make unknown) with the Honeywell CT31A 4-wire unit.

I matched up all signals based on color codes and terminal lugs:
W -> W
R -> R
Y -> Y
G -> G
this left a BLUE wire unaccounted for which I taped off.

sadly I did this at the end of summer and, after weeks of tossing the t-stat around, I finally throw it out failing to consider the HEATING side of the story - now I have come to realize my heater no longer turns on.

The error indicator on the unit is solid red (normal?).
AC works fine, just no heat - no flame, nothing.

any help on restoring the heat would be appreciated.
I believe it comes down to the BLUE wire marked "C" which has no corresponding lug for model CT31A t-stat.
* also- I failed to power down heater prior to removal of t-stat: live & learn.

Thanks in advance.
 
Sponsored Links
  #2  
Old 12-10-13, 05:42 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 13,928
Upvotes: 0
Received 0 Votes on 0 Posts
Jump therminals R&W at the furnace. If it comes on, the problem is with the stat or between the stat & furnace.
 
  #3  
Old 12-10-13, 05:55 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 51,892
Received 257 Votes on 242 Posts
Welcome to the forums.

The red LED on means you have power and didn't blow a fuse.
You only need four wires to activate the furnace for heating and cooling and it appears you have them on the correct terminals. If the blue wire is connected to C at the furnace then you csn just tape it off.

The link below is the manual for your furnace. Check page 9 and 10 as it describes the diagnostic method used to determine problems.

Carrier groups public documents - techlit.PDF
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


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