Hi all. Our furnace is doing this thing where it'll start up, run for 1 minute, then shut off. Then rinse and repeat. Sometimes it'll get up to the temp set on the stat, sometimes not. This is a forced air gas furnace, new in 2006. If I go downstairs and hit the electric kill switch on the furnace to shut the power off, then turn it back on after a minute or so, the problem seems to go away temporarily, but after a few minutes of heat running we're back where we started. Thoughts?? Thanks in advance for the advice guys.