HVAC thermostat help

[kschaper75]

I changed out the old thermostat for a programmable one as we are still moving from NC to SC and I want to control the temp for when I'm going down. Hooked this up and all I get is warm air blowing when it's on cool. What did I wire wrong. I have an old Payne heat pump and the T5 Honeywell thermostat

 

[87manche]

Did you take photos or notes how the old one was wired?

If you go to the heat pump and pop the service panel there will likely be a wiring diagram for the terminal blocks in there on a piece of paper, or it will be silk screened on the terminal blocks themselves.

 

[CarterKraft]

No power to y1? yellow and green need 24v to blow cold

 

[CarterKraft]

I changed out the old thermostat for a programmable one as we are still moving from NC to SC and I want to control the temp for when I'm going down. Hooked this up and all I get is warm air blowing when it's on cool. What did I wire wrong. I have an old Payne heat pump and the T5 Honeywell thermostat

Also did you set it up for correct cooling/heating configuration?

 

[kschaper75]

I didn't grab a picture as I was in a hurry. Attached the thermostat wire connection at the unit.

 

[kschaper75]

Here is the wiring schematic. It shows violet going to w3. In the unit the brown and blue are twisted together.

 

[Bowe]

Did you configure it as a HP in t-stat? If not O will not be energized with a call for cool, hence the warm air.

 

[87manche]

So you didn't follow the clear and concise instructions and the chart for writing down the wires on the old and transferring them over to the new thermostat?

I just installed a Honeywell thermostat.

 

[cj3a]

Is the problem with older systems not having a constant 24 volts at the thermostat?

 

[kschaper75]

Did you configure it as a HP in t-stat? If not O will not be energized with a call for cool, hence the warm air.

I did

So you didn't follow the clear and concise instructions and the chart for writing down the wires on the old and transferring them over to the new thermostat?

I just installed a Honeywell thermostat.

Why would I do that when I can just hope it's easy and I can come here and ask questions??????????!!

Is the problem with older systems not having a constant 24 volts at the thermostat?

Unit is from 09 so not that old

I did figure it out and the ac is blowing cold air. White wire needed to be in W and not W2

 

[Bowe]

I had a job a few months back where another company landed white on w as you did and it ran electric heat with a cooling call. I assume that’s why the flap says don’t do that on a HP. Same stat.

 

[Foxmxrcer]

W is for first stage heat, w2 is for second stage. The flap says not to use w with a heat pump..... Are you sure you have the change over valve wired correctly/tstat setup properly for your setup?

 

[kschaper75]

W is for first stage heat, w2 is for second stage. The flap says not to use w with a heat pump..... Are you sure you have the change over valve wired correctly/tstat setup properly for your setup?

It's cooling so I guess I do. I have it set up a single stage heat pump, air to air

 

[kschaper75]

I had a job a few months back where another company landed white on w as you did and it ran electric heat with a cooling call. I assume that’s why the flap says don’t do that on a HP. Same stat.

I saw that as well and pulled the white wire and got nothing. Found a post somewhere saying to put in w2 and it works