Here's what to do if your car won't start in cold weather (2024)

If you woke up Wednesday morning and your car wouldn't start, you are not alone.

As record-smashing cold envelopedmuch of the country, many drivers found themselves with dead batteries.

When it gets this cold outside, many things can go wrong with your car, but a big one is the battery, said Tires Tires Tires service adviser Rod Sammons. If your battery is on the older side, this can be a big problem.

"If you have a weak battery at all, the car just won't start," said AAA South Dakota spokeswoman Marilyn Buskohl. She recommends getting a new battery every three years.

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If you didn't think ahead and are waking up to a car that won't start, here are some things you can do:

Jump it.Sammons says getting a jump from a friend or tow truck will often do the trick.

"If the battery's got any life left in it at all, you can jump it," he said.

Your car's manual will include instructions on how to do this. Read them beforehand, because jumping a carincorrectly can cause your battery to explode!

Also, let your car run for at least 20 minutes after it's been jump-started to let the battery recharge or you could face the whole problem again when you try to restart it.

And a note about next time: It's always a good idea to have jumper cables in the back of your car.

Bring it to an auto shop.Bringing your carinto an auto shop is best for determining what exactly the problem is, Sammon said, but it can also have a positive side effect.

"Sometimes all it takes isgetting it into the shop and letting it warm up for a few hours and off it goes," he said.

Hold the key in the ignition for 10 seconds.In cold weather, engine oil thickens and doesn't flow as well. Moisture in the fuel lines can also freeze and cause a blockage, causing the engine to not start, Buskohl said.

"To start a car in freezing cold winter weather, start by shutting off any accessories, like the heater, radioand lights," she said. Then, put the keys in the ignition, turn and hold the key for up to 10 seconds. If this doesn't work, wait a minute or so before repeating the process.

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Take a Lyft to work and plan better for next time.Most people to wait until it's too late to start thinking about whether their battery is in good shape, Sammon said. While it may not help now, it may help you avoid a similar situation the next time the temperature dips.

Avoiding problems in the future:Parking in a garage, whether heated or not, will keep your car warmer than parking it outside. Even a carport keeps a car several degrees warmer than one parked outside with no protection.

Electric engine warming blankets can be easily fitted atop your engine or on the inside of your car hood to keep your engine warm overnight,according to Lifewire.com.

Other heaters include block heaters that bolt electrical elements to the exterior of the engine, oil heaters that take the place of a dipstick and coolant heaters to keep the antifreeze from, well, freezing.

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Contributing: The Des Moines Register

Follow Katie Nelson on Twitter:@katienjourno

Here's what to do if your car won't start in cold weather (2024)

FAQs

Here's what to do if your car won't start in cold weather? ›

"To start a car in freezing cold winter weather, start by shutting off any accessories, like the heater, radio and lights," she said. Then, put the keys in the ignition, turn and hold the key for up to 10 seconds. If this doesn't work, wait a minute or so before repeating the process.

What to do if a car won't start because it's too cold? ›

What Do You Need To Do To Start The Car In Cold?
  1. Warm up the battery. ...
  2. Turn on the ignition. ...
  3. Remember to pull the lever if your carburetor has no automatic choke.
  4. In cars with a manual transmission, before starting the engine, depress the clutch pedal to disengage the frozen transmission from the motor.
Jan 26, 2023

How to start a car in extreme cold? ›

Why won't my car start when it's cold?
  1. Warm up the battery by flashing the high beams for 20 to 30 seconds.
  2. Turn on the ignition. ...
  3. Pull the lever if your carburetor doesn't have an automatic choke.
  4. If your car has a manual transmission, depress the clutch pedal before starting the engine.
Jan 16, 2024

How do you warm up a frozen car engine? ›

Let the Engine Thaw

If your car is parked outside in the cold weather, it'll take days for your system to thaw properly. Therefore, you should move your car to a sheltered location like a garage. You can make the thawing process faster by using a fan heater. The heat will help melt the fluid quicker.

Is it normal for your car to struggle to start in cold weather? ›

Your car may not start in the cold because the batteries are not fully charged, according to J.D. Power. The consumer intelligence company said vehicle owners may notice this when the starter works sluggishly. "However, this may not be the only reason that prevents the car from starting in cold weather.

At what temp will cars not start? ›

According to a report by AAA Automotive Research Center, your car battery power falls by about 35% at 32°F, and if the temperature drops to 0°F, it loses 60%. When your car battery loses energy, it will be hard to start the engine because your car requires at least an 80% charge to start the ignition process.

Can a car ignition freeze? ›

Frozen ignition locks

This moisture could end up freezing your ignition lock. So, try your best to keep your car dry inside during the winter time to prevent this from happening.

At what temperature does a car battery freeze? ›

“A 100% fully charged battery will not freeze until approximately -76 degrees Fahrenheit,” Kimbrough said in a telephone interview.

How do I know if my car battery is frozen? ›

Some signs to look for are the following:
  1. Cracks anywhere on the battery case.
  2. Bulging sides.
  3. No sound of liquid when the flooded cell battery is moved.

Can you jump start a frozen battery? ›

Also, a frozen battery shouldn't be jump-started. If the electrolyte is frozen inside, the battery should be thawed indoors before attempting a boost. Attempting to jump-start a battery in any fashion other than the correct method can cause safety issues or damage to the vehicle.

How do you start a car in frozen weather? ›

Try to start your car:

Turn the key and hold it. Let the engine crank for about 10 seconds, but don't hold it any longer – you don't want to overheat or flood the engine. If the engine doesn't crank, let the engine rest for a few minutes and try again.

How to start a car that's frozen? ›

Turn the key to start and hold it for up to 10 seconds.

Don't hold it for any longer than 10 seconds, as overworking the starter will not make it any more likely to start. If you put the key in the ignition, turn it, and check if the dashboard lights up.

What temperature kills a car battery? ›

Evaporation. The internal temperature of a car battery can reach temperatures of 140 degrees or more. At these temperatures, the fluid within the battery that contains water, can evaporate and damage the battery's internal makeup.

How often should you start your car in freezing weather? ›

If you leave your car idle for extended periods, aim to start it at least once a week. Let the engine run for about ten to fifteen minutes. This allows the engine to reach its optimal operating temperature and circulates the oil, which is crucial for maintaining engine health.

Why is my car not starting but the battery isn't dead? ›

When you have a brand-new battery but still can't start the car, the alternator might be the issue. Cold and damp climates may increase wear on an alternator, causing it to fail. Flickering gauges and a burning rubber smell could indicate that the alternator overheated and requires replacement.

How do I keep my car battery warm overnight? ›

Use a Block Heater and Battery Pad

If overnight temperatures are 0 degrees Fahrenheit or lower, you may consider an engine block heater and battery pad heater or battery thermal wrap. Both items attach to your car and then plug into an electrical outlet.

How long does it take to run a car to charge the battery in cold weather? ›

You should drive the vehicle for at least 20 minutes at least twice weekly during the winter. A good ride charges the battery. The drive should be long enough to prevent the idling of your vehicle.

Why won't my car start but I have power? ›

A low battery is the most frequent cause of a car having power but not turning over. Other causes include a bad starter, a bad alternator, or electrical issues. If you hear clicking, whirring, or nothing at all when trying to start your car, you may have a bad starter, malfunctioning alternator, or low battery.

Why won't the car start but the battery is good? ›

You may have a bad starter if the car won't start, but the battery is good. Clicking noises usually point to an electrical problem. The clicking is the sound of the starter motor spinning.

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