Hi All,
First, thanks to everyone as this is the first time posting and this site has provided quite a bit of valuable information for me in the past. Now it's almost 90 degrees out and I cannot get my A/C to properly function and it's pretty hot in here to say the least.
This past Winter I replaced a White Rogers 1F78 (5/2) thermostat with a Honeywell Prestige thermostat. Heating works perfectly and the new thermostat (with remote) allows me to properly heat my newborn's room. When installing I noticed that there was a separate set of wires (white and red) that I'm assuming are routed up to the A/C unit on the roof -- note that I'm in a large condo building. When installing the thermostat for heating, these were not used and I'm sure this is the reason for my A/C not properly functioning.
When I select "Cool" on the new thermostat the fan comes on, but does not blow cold air. I ran up the roof confirming that the A/C unit was not powered on.
The original thermostat was wired with the following:
Grey cable:
Brown -- Not used
Yellow -- Not used
Green -- Green terminal
Red -- Red terminal (w/ jumper to RC)
White -- White terminal
White cable (one not currently used):
Red -- Yellow terminal
White -- Twisted with blue wire from grey cable
The furnace was wired with the following:
Grey cable:
Yellow -- Yellow terminal
Green -- Green terminal
Red -- Red terminal
Blue -- Common terminal
The current thermostat was wired with the following:
Grey cable:
Brown -- Common terminal
Yellow -- Yellow terminal
Green -- Green terminal
Red -- Red terminal (w/ jumper to RC)
White -- White terminal
White cable -- not used
The current furnace has the following:
Grey cable:
Yellow -- Yellow terminal
Green -- Green terminal
Red -- Red terminal
Brown -- Common terminal
Below are some pics for reference.
Old thermostat terminals:
New thermostat terminals:
Current furnace terminals:
Any suggestions?
Thank you!
First, thanks to everyone as this is the first time posting and this site has provided quite a bit of valuable information for me in the past. Now it's almost 90 degrees out and I cannot get my A/C to properly function and it's pretty hot in here to say the least.
This past Winter I replaced a White Rogers 1F78 (5/2) thermostat with a Honeywell Prestige thermostat. Heating works perfectly and the new thermostat (with remote) allows me to properly heat my newborn's room. When installing I noticed that there was a separate set of wires (white and red) that I'm assuming are routed up to the A/C unit on the roof -- note that I'm in a large condo building. When installing the thermostat for heating, these were not used and I'm sure this is the reason for my A/C not properly functioning.
When I select "Cool" on the new thermostat the fan comes on, but does not blow cold air. I ran up the roof confirming that the A/C unit was not powered on.
The original thermostat was wired with the following:
Grey cable:
Brown -- Not used
Yellow -- Not used
Green -- Green terminal
Red -- Red terminal (w/ jumper to RC)
White -- White terminal
White cable (one not currently used):
Red -- Yellow terminal
White -- Twisted with blue wire from grey cable
The furnace was wired with the following:
Grey cable:
Yellow -- Yellow terminal
Green -- Green terminal
Red -- Red terminal
Blue -- Common terminal
The current thermostat was wired with the following:
Grey cable:
Brown -- Common terminal
Yellow -- Yellow terminal
Green -- Green terminal
Red -- Red terminal (w/ jumper to RC)
White -- White terminal
White cable -- not used
The current furnace has the following:
Grey cable:
Yellow -- Yellow terminal
Green -- Green terminal
Red -- Red terminal
Brown -- Common terminal
Below are some pics for reference.
Old thermostat terminals:
New thermostat terminals:
Current furnace terminals:
Any suggestions?
Thank you!