I have a comfortmaker furnace that was installed about 8 years ago. The past two winters it has been acting up. The module would go through it's cycle, and the flame would ignite. After about 2-4 sec would cut out. The LED on the module would flash 6 times. No indication as to what that means. Through looking into it myself,I feel it may be either a bad rollout switch, or flame sensor. Other times it would work fine. Any suggestions before I get addition professional help. Thanks.