Is the issue my thermostat?
I've had a Nest Thermostat E in my house since 2020 with no issues. I live near Chicago and the last week it's been very hot. On Wednesday my HVAC system iced over inside my house (IE the compressor outside was not frozen). Had an HVAC guy come and look at it Thursday, cleaned my compressor coils, added more freon, etc. All working fine Friday and Saturday. Today (Sunday) it's frozen over again, but it hasn't even gotten above 80F here today.
I don't know if this is related but up until some time last week I was able to access my Nest devices in the Nest App, and then last week I got a notification that they're only available in Google Home. I have seen a lot of conflicting information about the Nest compatibility so I don't know if people have experienced a similar issue here. For what it's worth, my system's wiring is:
Y1 - Cool
G - Fan
R - Power
W1 - Heat
I have made no other changes, and would have thought that the issues prior to today could be explained by issues with the AC/compressor battling the extreme temperatures, but given my issues today along with the relatively mild environment, I don't know if there's a software issue or if I just need to upgrade to a different thermostat. My HVAC guy said something about how another customer with a Nest had an issue with it confusing her AC for a heat pump, so I want to eliminate any Nest issues before I try to replace the AC (roughly 15 years old, not urgently in need of replacement but could replace it soon).