What is the flame rollout switch for?
I have a Carrier 58wav070-1-12 gas furnace and the induced draft blower motor is not turning. The LED fault code is three short flashes followed by three long flashes (33), which is supposed to mean limit or flame roll out switch is open.
I know the blower is good because it turns if I disconnect the wires and apply 120 volts AC directly to it.
There is also supposed to be a manual reset on some limit switch, but I don't see any switch with a reset on it. And it doesn't say what the limit switch is for or where it is.
Another symptom is the main blower is always running.
My guess is the problem may be the computer that controls everything because the component self test doesn't run.
I guess a defective low gas pressure sensor switch could also inhibit the furnace turning on because that is not tested by the self test.