That could be a bad thermocouple. If you notice the same thing happening again, go out and buy a new thermocouple first. They are rather easy to install and are not a very expensive part. They are probably 10 dollars or less. Just take the old one out, straighten it, measure its length, and get the replacement one in the same, or slightly longer, length.fbodgrl said:Yep. This is the first time since we bought the house in November. Both covers were on, so I don't think it was a draft. Hopefully it was just random.