Heat in cool mode, cool in heat mode

[RealtorTim]

I have trying to trouble shoot this for a long while now.  I have forced air in a condo.  Changed the Nest and installed - all worked well - UNTIL my wifi router had to be changed - then the heat and cool reversed.  To get heat, have to have in cool mode and raise temp.  If in cool mode and inside temp triggers the thermostat - we get heat when thermostat at its max 32C.  Who wants more heat.  To get AC must be in heat mode and turn up to get cool to run and not shut off.  Have factory reset the thermostats numerous times, nothing has changed with wringing since original install.  Not sure where to go from here and Don't want to have to go buy something new that is not a NEST.  HELP

[Houptee]

If this is a heat pump system the O/B wire changes the system to heat and ac mode. You can change the output of the ob wire in the settings to fix this.

[RealtorTim]

In the settings there is no option on the first generation to do this. Not from what I can see in settings. 

[RealtorTim]

Not a heat pump.  Forced air

[WalkGood]

I would review all wiring,  even at the outside ac unit.  Sounds odd.  Maybe someone playing tricks on you by reversing wiring? 

[RealtorTim]

Not true.  I did the wiring. It worked as indicated.  When wifi router changed and I reconnected the thermostats it became clear the devices  were working in reverse. Nothing else changed.  Suspect it's a Nest Flaw.  Even when factory reset. And reconnecting. It's remains the same. 

[WalkGood]

bypass the thermostat wiring to turn on the ac manually.

[WalkGood]

Did by-passing the wires help?

[RealtorTim]

Didn't bypass any wires. Don't have a heat pump. 

[Jenelyn_O]

Hi there,

Thanks for reaching out and for being a step ahead of us. I'm sorry  for the delay. 

If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when it's in Cool mode), change the settings for orientation of your heat pump.

You can try the steps below: 

Nest Thermostat 

1. Open the Home app.
2. Tap your thermostat.
3. At the top right, tap Settings.
4. Select Thermostat.
5. Scroll until you find Heat pump. It should show which wire configuration is currently selected.

• If the O option is highlighted, select B.
• If the B option is highlighted, select O.

Nest Learning Thermostat and Thermostat E

1. On your thermostat, go to Settings.
2. Select Equipment.
3. Select Continue.
4. Select Heat Pump.
5. The Nest Thermostat defaults to an O setting for heat pumps.

• If the O option is highlighted, select B.
• If the B option is highlighted, select O.

I appreciate your help, @Houptee and @WalkGood.

Best,

Jenelyn

[WalkGood]

The original poster states he does NOT have a heat pump.  

[Jenelyn_O]

Hi there,

Gotcha! I'm sorry for the misunderstanding.

@RealtorTim, we'd like to investigate this case for you. Please fill out this form and let me know once you're done.

I appreciate your help, @WalkGood.

Thanks,

Jenelyn

[Jenelyn_O]

Hello there,

Checking in — were you able to fill out the form? Please let us know once you're done.

Best,

Jenelyn

[Markjosephp]

Hello RealtorTim,

I wanted to see if you were able to fill out the form. Please let us know so we can assist you right away.

Regards,

Mark

[Markjosephp]

Hi RealtorTim,

I'm checking in to make sure that you've seen our response. Please let us know if you have any additional questions or concerns before we lock this thread in 24 hours. 

Regards,

Mark

[WalkGood]

You misunderstand.  I mean for you to manually bypass the thermostat and connect the appropriate wires together to make your ac turn on.  

[RealtorTim]

No true. A condo. Nothing changed but the router.  Work perfect before. suspect a Nest flaw