Hello, On Wednesday the furnace stopped heating (Bryant 90plus model 340MAV) . Checked error code. It said reset flame rollout switch. I did. Furnace worked fine for 2 days, then the same thing happened. I then replaced flame rollout switch with a new one. Furnace worked fine for 1 day, then it happened again. It has a new furnace filter in it and everything else appears to be operating fine. Any suggestions what to check next??

(I can keep it running by using a small fan to keep the area by the flame rollout switch a bit cooler, but I know there must be something wrong... )