As temperatures rise, so do the chances of car trouble. The heat and sun can be just as harsh on vehicles as cold winter conditions. Many drivers overlook how extreme weather affects their cars, especially when hitting the road during vacation season or daily commutes under scorching skies. Understanding the typical car issues that arise in warm weather can help prevent breakdowns, keep repair costs down, and ensure your safety on the road.
Below, we explore the most common vehicle problems that tend to show up when it’s hot outside, and what you can do to prepare and protect your car.
Overheating Engines
One of the most frequent problems drivers experience in hot weather is an overheating engine. High temperatures, combined with increased use of the air conditioning system, can strain the engine cooling system. When your car’s radiator, thermostat, or water pump is not functioning optimally, coolant may not circulate properly, causing the engine to overheat.
Common signs include steam coming from under the hood, the temperature gauge rising into the red zone, or the engine warning light turning on. To prevent this, ensure your coolant levels are full and the system is flushed according to your vehicle’s maintenance schedule. Checking hoses and belts for cracks or wear is also crucial since heat can accelerate deterioration.
Weak or Failing Batteries
Batteries are often associated with winter-related failures, but hot conditions can be just as damaging, if not more. High temperatures speed up chemical reactions inside the battery, which can lead to overcharging and shortened battery life. Additionally, battery fluid can evaporate faster in the heat, damaging the internal structure.
You might notice slower engine cranks, dimming lights, or dashboard warnings. Before the peak of the hot season, have your battery tested. Make sure it’s securely mounted and free of corrosion around the terminals.
Tire Blowouts
Rubber tires are highly susceptible to heat. As outside temperatures climb, so does the pressure inside your tires. If a tire is already under-inflated or worn out, the added heat and pressure can lead to a dangerous blowout. This risk increases when driving on hot pavement or taking longer trips at high speeds.
Check your tire pressure frequently and ensure it matches the recommended PSI listed in your car’s manual or door frame. Also, inspect tread depth and look for signs of uneven wear, cracks, or bulges. Don’t forget to check your spare tire and keep it properly inflated.
Air Conditioning Failure
No driver wants to sit in traffic or drive long distances in a vehicle with a broken air conditioner. During warm months, the demand on your car’s A/C system increases dramatically, and if the system is low on refrigerant or has a failing compressor, it can stop functioning effectively, or altogether.
If you notice weak airflow, strange smells, or unusual noises when the A/C is running, it’s best to get it checked early. Regular maintenance, such as topping off refrigerant and changing the cabin air filter, can improve performance and comfort.
Worn Belts and Hoses
Belts and hoses are essential to your vehicle’s operation, connecting various engine components and helping circulate fluids. Unfortunately, rubber components degrade more quickly in hot weather. A worn serpentine belt can snap, disabling critical functions like the alternator, power steering, and water pump. A cracked radiator hose can leak coolant, leading to engine overheating.
Regular inspections can catch these issues early. Look for any signs of cracks, fraying, or leaks. It’s a good practice to replace belts and hoses as recommended by your car’s manufacturer, especially before long summer road trips.
Brake Problems
Brake components can suffer from increased heat during summer months, especially if you’re driving in stop-and-go traffic or mountainous areas. Excessive heat can lead to brake fluid boiling, which reduces braking efficiency. Additionally, worn brake pads or warped rotors can become more noticeable in warmer conditions.
If you notice squealing, grinding, or reduced braking power, it’s time to get your brakes checked. A well-maintained braking system is crucial for safe driving, particularly when road conditions and temperatures are unpredictable.
Evaporative Emissions System Failures
Modern vehicles are equipped with an evaporative emissions system (EVAP) designed to trap and process fuel vapours to reduce air pollution. During hot weather, pressure builds up in the fuel tank, making the EVAP system work harder. If there’s a leak or a faulty component, it can trigger a check engine light.
A common summer mistake is not tightening the gas cap properly. This alone can cause a warning light to appear. If the light stays on, a mechanic can perform a diagnostic check to ensure it’s not a more serious EVAP issue.
Fluid Degradation
Warm conditions can cause several vehicle fluids, including motor oil, transmission fluid, and brake fluid, to break down more quickly. When this happens, their ability to lubricate, cool, and protect internal components is reduced. As a result, you may experience reduced engine performance, slipping transmission, or spongy brakes.
Make it a habit to check all fluid levels regularly. Top off or replace them as needed, especially if you plan to drive frequently or take longer trips during the season.
Reduced Fuel Efficiency
While it’s common to associate poor fuel economy with winter idling, warm weather can also impact gas mileage. Running the A/C, driving in congested traffic, or sitting idling with the engine on can lower your car’s fuel efficiency. Low tire pressure caused by fluctuations in air temperature can also contribute to increased fuel consumption.
Keep your tires inflated properly, reduce A/C use when possible, and avoid extended idling. Also, consider scheduling a fuel system cleaning to ensure optimal engine performance.
Windshield Wiper Damage
Although wipers are typically associated with rain or winter slush, they can also suffer from extreme heat during the summer time. The rubber blades can dry out, crack, or become warped, reducing their ability to clear your windshield during a summer thunderstorm.
Inspect your wipers and replace them if they leave streaks or make noise when in use. Many drivers forget about them until it’s too late, but clear visibility is essential year-round.
Interior Damage from UV Exposure
While not a mechanical issue, prolonged exposure to sunlight can fade and damage your vehicle’s interior. Leather seats, dashboards, and trim can crack or discolour due to UV rays. Electronics and sensors exposed to direct heat for extended periods may also malfunction.
To protect your car’s interior, use sunshades, park in shaded areas when possible, and consider applying UV protectant products to interior surfaces.
Prepare Your Car for the Heat
Many of these issues can be avoided with a little preparation and regular maintenance. As the season begins, it’s wise to have your car inspected by a professional to identify any parts that are wearing out or in need of attention. Preventive measures can go a long way in avoiding costly repairs and inconvenient breakdowns.
Final Tips for Summer Driving
- Keep a roadside emergency kit in your car, including water, jumper cables, a flashlight, and basic tools.
- Avoid driving on low fuel, as heat can cause fuel to expand and evaporate faster.
- Watch for dashboard warning lights, especially for temperature, battery, and engine.
- Plan longer drives during cooler parts of the day, like early morning or evening.
Stay Road-Ready This Summer with TrilliTires
Don’t let heat-related car issues catch you off guard. At TrilliTires in Richmond Hill, we provide expert inspections, tire services, and auto maintenance to keep your vehicle performing its best in every season. Visit us today and drive with confidence, no matter how hot it gets.