Inducer motor not functioning consistently
We have a Carrier 58 RAV downflow furnace. When the thermostat calls for heat the inducer functions inconsistently. Sometimes (though rarely) it functions completely normally, and the ignition sequence occurs properly. But most of the time it either cuts off in the middle of the purge period, or the purge period is normal and then the ignition sequence stops short, sometimes the inducer motor doesn't even start as it should.
When I run the component test the code does come up as a 31, but all the components turn on properly, including the inducer motor.