We turned on our heater (we have central air and heat) for the first time in a long while just a few days ago. After a few minutes, there was a burning smell throughout the house, so we turned it off.
Yesterday and the day before, we used it again for short periods and there was no smell. But tonight when we turned it on, the burning smell came back and the red emergency light was on the thermostat.
I read around the internet and it says this:
What do you think? Is it normal or is something broken?
Thanks in advance for all the legit responses. I'm hoping one of you is an AC/Heat specialist.