Ford flex 2013 will not start in cold weather 35 or below it did this last year took to a ford dealer they replaced and said it was the battery which we had already replaced brought it gome the next day the same thing. It started fine and ran fine everyday all spring and summer now the temp dropped around or below 35 and it will not start. It cranks over fine and only happens in the cold if it warms u to 50 or 60 degrees out it will start noone seems to know what the problem is.

  • Welcome to Motor Vehicle Maintenance & Repair! Nov 11, 2018 at 1:51
  • 35° F is getting pretty close to freezing. Moisture or condensation could be freezing. Have you tried gas line anti-freeze? A litre of methyl-hydrate in a tank of gas does the same thing.
    – user16128
    Dec 6, 2019 at 13:03

1 Answer 1


They’re probably right. There’s something called ‘cold cranking amps’ which is the rating of how cold it can be outside for the car to start. Get a battery with a better CCA rating.

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