I will be amazed and grateful if someone can solve this one. At the moment I had to take down the Nest Thermostat and reinstall the ancient Carrier thermostat that came with the place. Here are the facts:
1- Condo unit with forced air heat and cooling.
2- wires are W1/O/B, Y1, G, R, C
3- after I first installed the Nest Thermostat it attempted to cool the condo while I was away but instead triggered heat and got the place up to 101° 🙄
4- in response I switched the W1 & Y1 wires. This allowed the Nest to provide heat when called for. But when cooling was called for it would only run the fan.
5- With the old thermostat reinstalled the air conditioning works fine.
So can someone in here figure this one out? I really want to have a smart thermostat but at the moment it is looking like I need to return or Ebay my Nest Thermostat.
Happy to answer any other questions as well as I can. Thank you!!!