Switched thermostat from a/c to heat while a/c was running
I recently had a Carrier gas furnace and central air installed. When the HVAC tech. was explaining the digital thermostat to me (while the a/c was running) we changed the thermostat setting from cool to heat, again while the air conditioner was still running. The furnace soon kicked on. Did this cause any damage...switching on the furnace while the a/c was running? Maybe I'm being picky, but I want my new system to run perfectly. I would appreciate any comments.