Linda99

Scientist1968, Nope. Ending up trading in the car. It was fine in the temps you describe though--the problem was only in really cold weather, well below freezing or even subzero.

Murphy, if that was the case, wouldn't it happen regardless of temperature? This ONLY happens when temps are well below freezing. If the car spends the night in the garage, or if weather is just around freezing, it starts with no problem.

To answer Fission -- it's completely dead. Key fob won't open the door, no lights come on.

The battery's been tested by Walmart and Ford, and they both said it's fine. Wouldn't their test include what you describe? Also, the car starts fine if it's stored in the garage... the problem is only if it has been outdoors in the cold (below freezing), and then it is even if it has been only an hour or two.

As soon as the weather (in Montana) got really cold, my son's 2013 Ford Fusion Hybrid SE wouldn't start. He needs to get a boost anytime the car has been parked for more than about an hour. The battery has been tested (twice) and he's been told it "passed with flying colors". He has also been told it has a CCA rating of 390. I get the impression from reading these forums, and searching online, that the newer model of the battery (99RT4) has a higher rating (470?). Is this correct? Will getting a newer model battery (will have to be ordered--neither the Ford dealer nor local automotive retailers have it in stock) solve the cold weather starting problem?