Nest Thermostat wiring issue — not heating

Question

We just moved in and tried to replace a Honeywell Thermostat with the Nest Learning Thermostat Gen 3. Looks like the heat function is only blowing cool air, so we think we wired things incorrectly, but aren’t sure what to do to fix it. The A/C has been working fine and blows cool air.

Here is a link to the model of the system we see outside: Rheem RP1424AJ1NA 2.0 Tons Classic 14 Seer Heat Pump 1 Stage R410A 208-230/60/1

Here’s the previous wiring with Honeywell:

Here’s how we tried to wire our Nest (wire labels added by us, so they may not be accurate):

Update: We found out there are two sets of wires behind the plate; they are currently connected to the Nest as follows

Left set:

• Blue - (pictured with exposed copper)
• White - W2aux
• Red - Rc
• Green - G
• Yellow - Y1

Right set:

• Blue - (snipped/not connected)
• White - C
• Red - (snipped/not connected)
• Green - Ob

Could someone please help us figure out which wires need to be swapped/moved to get the heat to work? Temps are starting to drop in our area, so we’re nervous to get heat soon! Thanks in advance!

Answer 1

It's hard to be sure just by the pictures but I think you should move your wire from W2 to W1

Typically the heat is triggered by connecting Rh to W1. In your case your 24v supply is shared between both heating and cooling so it's on Rc (which is correct for the nest, but it was connected by a jumper in your old thermostat)

Fan is typically triggered by powering G, which is why that works. A/C is typically triggered on Y1. So I bet your A/C is working properly?

Your other wires are curious and you may need to provide more info about your setup to get it correct.

Also, blue wire is usually the C wire. Your picture makes it look like you have two different wire groups: one group of five conductors and one group of two conductors. Do you, perhaps, have a separate heating vs cooling system?

Answer 2

You need to go in settings and change the setting for the reversing valve from O to B, Rheem valve must be energized for heat mode, most others must be energized for cooling, default is O setting