My Carrier Weathermaker 8000 a few days ago the air began to blow non stop and the burners are not igniting. I am getting Code 33. I did all the resets, unplug control board, switch to air condition nothing. The air is still blowing non stop. To stop it I need to shut it off by main switch on furnace. Any fix suggestions?

You have a couple of reset buttons and a couple of safety protectors that could be the cause.

When you unplug the furnace with out the thermostat calling for heat. And then plug it back in and turn the thermostat to heat and there temp up high what does the furnace do. Explain form start to finish what it does.

I will get back to you.

Resets Flame Roll-out switch

Reset and clean Flame Roll-out switch.
Now everything working.

Where is flame roll-out switch? And how can I reset?