I am experiencing the same problem for my Pulse which has been operating well for 12+ years. I had been turning the power off and on as blewis123 said and it did fire up only to run for at most 24 hours. I more recently followed the directions that are posted next to the blinking green light which said to turn off and let it sit for 1 hour. I did that and it is operating correctly ... so far. If this does not self-correct as implied by the inserted instructions, I will also replace the module as blewis123 did.