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Why Does My Car Radio Not Work When It’s Cold? (Tips To Make It Working)

While driving a car during winter, you probably noticed that the car radio or cd player does not work well when it is freezing outside.

But why does car radio not work in cold weather? Let’sLet’s find out.

Car radios do not work in cold weather due to contracting internal soldering joints on the circuit boards. Also, cold temperatures make loose connections affecting car radios’ overall functioning.

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Tip: When you struggle to turn on the engine in cold weather due to a weak battery, you may use the jump starter and then replace the battery right away. 

If you want a great jump starter for a low cost, click this link to check a wide selection of different jump starters available on Amazon. 

In the article below, I will dig deeper into the problems with car radios not working well during cold weather and how you should warm the radio before starting.

Do Car Radios Always Malfunction in Cold Weather?

Car radios do not always malfunction in cold weather. But due to the electronic components becoming brittle from the freezing temperatures and contracting soldering joints, car radios can experience trouble working well when it is too cold outside.

Car radios often do not work in freezing temperatures due to condensation. This happens when moisture in the car’s interior and on the car radio’s circuitry is exposed to low temperatures causing it to freeze.

The resulting ice crystals would block or interfere with its electrical signals, leading to poor sound quality or no signal at all.

Another possible reason why car radio does not work in cold weather is that car batteries tend to lose power as the temperature drops outside.

With a decreased battery voltage, car radios may encounter problems such as struggling to start up or providing poor sound quality due to low electrical current, and this is also something you may notice with the lights when they start flickering.

What Can I Do When My Car Stereo Does Not Work in Cold?

#1. If your car radio does not work in cold weather, you should first warm it up. To do this, start your car and turn on the car radio. This will help warm up the car radio’s internal components and may improve its performance.

#2. Make sure that the car radio’s power source (car battery) is functioning correctly. If the car battery is weak or dead, the car radio will struggle to start up and may produce poor sound quality.

#3. Check the car radio’s antenna for any problems, such as corrosion or damage due to extreme cold weather conditions.

How to Warm up the Car Radio in Cold Weather?

If your car is standing in cold weather for a long time, you must take precautions before turning on the car radio.

In cold weather, the materials contact and eventually crack sometimes. So before turning the radio on, you should properly warm up the car.

Modern fuel-injected gas engines do not require longer times to warm up, and even in cold weather, it does not take long for a car to warm up.

Here are the simple steps you should consider before turning on the car radio:

#1. Make sure to park the car in the sunlight during winter. The sunlight will help maintain a warm temperature inside the vehicle. 

#2. After starting the car, rotate the heat control knob to the hottest setting, turn the air control knob to the head and feet setting (for even distributing hot air inside the cabin), and the fan control knob should be fully open. 

#3. Turn on the AC and set it to hot air. Air conditioning will help warm up the air inside the car and remove any congested moisture from the air. 

After a few minutes, all the car stereo parts, like speakers and amplifiers, will be at the optimal temperature. 

#4. Now that you have warmed up the car radio, it’s time to turn it on. 

If the car radio screen is still showing weird things or the car radio is not functioning well, you should take a car to a professional to check the radio. 

How Does Cold Affect Diodes in Car Audio?

Unlike every electronic device, car radios are made of tiny components like diodes (rectifiers), resistances, power amplifiers, tuners, integrated circuits, etc.

Therefore, car radios’ health depends on the proper functioning of these electronic components. 

What is a diode, and how does the temperature affect it? 

A diode is a semiconductor device acting as a one-way electronic circuit switch. It allows the current to flow in one direction and restricts the current flow in the opposite direction. 

The power output of a diode is directly proportional to the temperature. It means that in cold weather, the diode acts as an open switch in the circuit. 

Lowering temperature increases the resistance of all semiconductor components used in radios. Thus when you try to start your radio in cold weather, the amount of current needs to be higher to balance out the resistance caused by cold temperatures. 

This is why your car radio starts working correctly when the car is warmed up for 10-15 minutes. 

How Cold Affects Reception in Car Audio?

The reception of car radio varies with the atmosphere and types of radio frequencies.

The air humidity increases typically for colder weather and especially in the rain.

Since water is an excellent electric conductor, it absorbs radio waves, causing a decrease in the reception of car radio signals.

On the other hand, snow has a more negligible effect on car radio reception than rain because snow is less dense than water. 

In freezing temperatures, radio transistors lose their ability to amplify the signals, affecting proper radio functioning.

How Cold Weather Affects Solder Joints in Car Audio?

Soldering is the process of joining two things with solder to make electrical connections.

Unfortunately, due to cold temperatures, the soldering joint on the PCB board of the car radio may shrink.

Shrunk soldering joints interrupt the electrical signals, so sometimes, the touch display or buttons of the car radio are not working correctly.

When the car is warmed up and the temperature in the cabin has increased, the soldering joints expand, and the electrical circuit is restored.

This problem is complicated to troubleshoot. However, if you notice this issue with the radio functioning in various temperatures before the car is warmed up, you may need to check the radio for improper soldering joints on the circuit board. 

Can Cold Weather Cause Shorts in Car Audio?

When the humidity in the air is high in cold weather, tiny particles of water get into the car stereo.

Because water is a good conductor of electricity, it can cause short circuits in various electronic components when the radio is turned on. Also, water and even often moisture lead to corrosion or oxidation in metal parts. 

How Does Cold Weather Affect Car Batteries?

Cold weather causes more breakdowns in car batteries, and at 32 degrees Fahrenheit, the battery loses its strength by about 35%.

At 0 degrees Fahrenheit, car batteries lose around 60% of their strength, and with these reduced capacities, car batteries cannot start the car’s engine.

When the car engine is not turned on, the car radio gets its power from the car’s battery.

As you can imagine, car radios stop working when the car’s battery dies.

This is due to activating the “anti-theft” feature, which activates when the battery is removed.

Does It Mean That Car Radio Only Works When It’s Hot?

Car radios most often run in all temperatures, but low temperatures can affect performance.

Cold weather affects various car radio components, such as diodes, solder connections, and transistors which affect car radio reception and functionality.

It is therefore recommended to warm up your car for a few minutes before turning on the car radio to ensure proper car radio functioning. This is what I do when is freezing outside, and it helps my car to stabilize the temperature a bit before starting. After those few minutes, not only the car but also my radio works better.

Also, car batteries tend to lose their power in cold weather, so it may be necessary to replace them more frequently. Thus car radios might not work even when the car is warm due to a dead car battery.

The best way to ensure proper car radio functioning in cold weather is by regularly checking your car batteries and car radio components and warming up your car before turning on the car radio.

These simple steps can help prevent car radios from malfunctioning in cold weather.

Conclusion 

Car radios are sensitive devices that need proper care and maintenance, especially in cold weather, so don’t immediately turn on the car radio.

Be patient and let the car warm up properly. The electronic components in them operate well under a specified range of temperatures.

The manufacturers of car radios test their devices under harsh conditions. 

For example, the optimal temperature range is specified in the manuals, but extreme temperatures and especially cold conditions can easily cross that barrier.

FAQ

Why Does My Car Radio Stop Working in Cold Weather?

It is mainly because cold does affect the batteries, making them sometimes unable to turn on the radio.

Another reason could be that the cold can cause the metal parts of the radio to contract, leading to loose connections that can cause the radio to stop working.

How Can I Fix a Car Radio That Won’t Turn On in the Cold?

One solution is to try turning up the heat in the car, which can help to warm up the battery and other components of the radio.

You can also check the connections to the radio, making sure that they are secure and that there is no rust or corrosion.

 If this doesn’t work, it might be a good idea to take the car to an electrician or car audio specialist.

Why Does My Car Radio Lose Reception in Cold Weather?

Lost reception when it is freezing can be caused by ice or snow building up on the antenna or the wire, which can block the radio signal. It also can happen that when your wires are a bit brittle and there is an extremely cold temperature, you may have a wire that’s broken inside the insulation.

To fix this, try wiping off the antenna or using a small brush to remove the ice or snow. If this doesn’t work, it might be a good idea to take the car to a professional mechanic.

Can a Car Radio Fuse Break Because of Cold Weather?

It is possible that a car radio fuse could break when it’s cold. As the temperature drops, the metal in the fuse can contract, causing it to become more brittle and more likely to break.

Additionally, if your fuse is already weakened or damaged, the added stress of the cold weather could cause it to fail.

However, it’s not always the case, and other factors may also come into play, such as the fuse’s age and condition, the installation’s quality, and the vehicle’s overall electrical system.

Why Do Car Speakers Cackle When It Is Cold?

There are several reasons why car speakers may crackle when it is cold. Some of the most common causes include the following:

#1. Moisture

Cold weather can cause condensation to form inside the car, which can damage the speaker’s components and cause them to crackle.

This happens when the air inside the car cools down, and the moisture in it will turn into tiny droplets of water.

If these droplets come into contact with the speaker’s components, they can cause rust and corrosion, resulting in poor sound quality and crackling.

#2. Cold-Induced Contraction

When the temperature drops, the metal in the speaker’s components can contract.

This can cause the speaker’s coils and cones to become misaligned, resulting in poor sound quality and crackling.

#3. Electromagnetic Interference

Cold weather can cause static electricity to build up in the car, interfering with the speaker’s signals and causing crackling.

#4. Wiring Problem

Cold weather can cause the wiring in the car to become brittle and more prone to breaking. For example, if the wiring connecting the speakers to the car’s audio system is damaged, it can crackle.

To avoid this problem, you can try to keep your car in a garage or covered area whenever possible and let your vehicle warm up for a few minutes before turning on the radio.

Also, you can use a dehumidifier in the car when you don’t use it to reduce the amount of moisture inside the vehicle.