Hello everyone, It's getting colder in my house every minute I have Carrier 58TUA furnace It work great until yesterday when I've noticed that it never turns off for some reason I got new thermostat first but quick fix failed I can only turn it off using switch on the furnace
LED error code is 12
BLOWER ON AFTER POWER UP (115 VAC or 24 VAC) -Blower runs for the selected blower off-delay time, if unit is powered up during a call for heat (R-W/W1 closed) or (R-W/W1) opens during blower on-delay
Is that control board went bad?
Thanks ahead