I have a two year old high efficiency Goodman furnace that seems to have problems from time to time. The strange thing is that my son-in-law had his furnace installed about the same time and he has the same problem. We have our thermostat programmed for 62 during the night and at 6:00 am it goes to 72. That is when we both have the problem of the furnace not wanting to start. The code is three blinks. The way we fix it is to shut the power off, remove the exhaust tube, and usually water runs out of it, and then reset the power. It then will start and then we replace the exhaust tube. Never quits during the day and runs like it should. He has had the service man out twice, once he replaced a pressure switch and the next time he replaced a motor. His has quit the last two mornings, where mine has not acted up for a few weeks. I would like to think that Goodman has a good furnace but not so sure anymore. Does anyone have any idea what the problem might be?