Hi. I live in a mobile home with a coleman gas furnace, model # 7665-856 serial # 078275165 . The warm air comes up through vents in the floor. The furnace was working great until last night. Here's my problem...We light the pilot, set the thermostat, thermostat "clicks", the furnace kicks on, heats for about 10 minutes, pilot goes out, the blower continues to blow for a few minutes, then it also shuts off. We can relight the pilot without a problem and then the same things happen. We have already replaced the thermocouple and there is no draft. Could a bad switch be causing it to do this? We noticed that the blower switch has a little red button in the center and it doesn't pop back out. Any suggestions would help !!