I have an ancient ducted heating system. I want to replace the thermostat (control panel). It is Vulcan cx90. I opened the cover and found out the labels are "A, B, C, D, E, F". I checked out some morden thermostat products, and their labels are like "W D G R C Y" etc. The job may involve wiring mod as I googled.
I need a person who is familiar with cx90 to tell me if I can replace this thermostat with Honeywell or Sensi thermostats and how much is installation?
Specific Job Details:
Schedule: Next couple of weeks
Does customer have a budget for the job?: No
Visit schedule: Weekends
Visit during: Anytime