I am not an HVAC tech. I was wondering if it is possible to add a 2nd thermostat to my HVAC system. Currently, I have a digital thermostat downstair and was planning to add a 2nd one upstair. The reason for this is because, during summer time, upstair will still be very hot and the thermostat will shut down the AC since it has reach the set temp downstairs. I plan to use one thermostat at a time only. During daytime, it will be the one downstair and duirng night time it will be upstair. I plan to connect the 2 in parallel. Do you see any problem with this type of connections. I know there are wireless device out there, but I still prefer hardwire.Appreciate any input on this.
Thanks Tony