It's 6:40 AM, the windshield is frosted over, the thermometer says it's below zero, and you turn the key. Instead of the engine starting you hear a click, a slow groan, or nothing at all. Every Twin Cities driver has been there. The good news: the sound your car makes is a clue, and knowing what it means helps you decide what to do next.
Why cold mornings are so hard on cars
Cold hits your car from three sides at once. A battery makes power through a chemical reaction, and that reaction slows down in the cold, so the battery has less to give. At the same time, engine oil thickens, so the starter has to work harder to turn the engine over. And many winter trips are short (home to work, work to the store), so the battery never fully recharges between starts. Put those together on a frozen morning and a battery that felt fine in October can come up short.
Listen to the sound
Rapid clicking, dash lights flicker. This usually means the battery has some charge, but not enough to spin the starter. It's the classic "needs a jump" sound.
Slow, labored cranking ("rrr… rrr… rrr"). The battery is struggling. It may start after a few tries, but a slow crank on a cold morning is a warning that the battery is weak or getting old.
One single click, then nothing. The battery may be fine and the problem could be the starter, a loose or corroded cable, or a connection. A jump may or may not help.
No sound, no lights at all. The battery could be completely drained (a dome light left on overnight, for example), or a battery cable could be loose or badly corroded.
Engine cranks at normal speed but won't fire. That points away from the battery and toward fuel or ignition. In deep cold, moisture in the fuel system can freeze in some vehicles, and a nearly empty tank makes that more likely.
What to try before you call
- Turn everything off. Heater fan, headlights, radio, seat heaters, phone chargers. Give the battery every bit of power for the starter.
- Try once, then wait. Crank for no more than about 10 seconds at a time, then wait a minute before trying again. Long cranking on a weak battery can drain it completely.
- Check the shifter. Make sure an automatic is fully in Park (or try Neutral). A shifter that isn't fully in Park can stop the car from cranking at all.
- Look at the battery terminals if you can safely reach them. White or green crust, or a cable you can wiggle by hand, can stop power from getting through.
- Don't pour hot water on anything. It can crack glass and refreezes fast. And don't try to warm the battery with a torch or heater.
When a jump is the right call
If you hear rapid clicking or slow cranking, a jump start is usually what gets you moving. A careful jump in the right connection order is safe for modern vehicles. That's why it's worth having a pro do it instead of a stranger with an old set of cables. After the car starts, drive it for 20 to 30 minutes on a real drive instead of letting it idle in the driveway, so the alternator can put charge back in.
Learn more on our Jump Start Service page.
When the battery is the real problem
If you needed a jump yesterday and you need another one today, the battery is telling you something. Batteries that are several years old, or that have been drained flat more than once, often can't hold a charge through a Minnesota cold snap. In that case a new battery saves you from getting stuck again tomorrow morning. We can bring one to you and install it where you are. See Battery Replacement.
Small habits that help all winter
- Keep your gas tank at least half full in winter.
- Park in a garage when you can; even an unheated garage is warmer than the street.
- If your car has a block heater, plug it in on the coldest nights.
- Combine short errands into one longer drive so the battery gets a real charge.
- Have the battery tested before winter if it's more than a few years old.
Need help this morning?
UK Roadside comes to you in Coon Rapids, Minneapolis, St. Paul and across the north metro, Monday through Friday from 6 AM to 10:30 PM. Call (855) 799-4711 and tell us what sound your car is making. It helps us bring the right fix.
