If the San Jose Barracuda are the hottest team in the league, it's not hard to pick the coldest. The Stockton Heat haven't won a game since January 20th, over a month. In calendar year 2017, they have just 3 wins, going 3-12-1 since the new year began. Their win against Milwaukee set them at 18-9-3-1 on January 7th, and they've been in a spiral since.
Things that aren't clicking for the Heat are numerous. The power play has just a single goal on their last 53 opportunities (3.8%). They've been shutout four times since January 7th, so overall scoring is an issue as well.