At D&A Automotive, we’ve been keeping drivers in Witney and across Oxfordshire safely on the road for decades.
Every summer, our workshop sees a steady influx of cars struggling with heat-related issues, many of which could have been prevented with a quick check or simple maintenance.
Here’s what you need to know about hot weather and cars.
Do Cars Break Down in Hot Weather?
Yes, cars break down significantly more often in hot weather.
Summer heat waves can lead to just as many breakdown call-outs as icy winter conditions.
High ambient temperatures put intense pressure on your engine’s cooling system, strain the battery, cause air conditioning systems to fail, and increase the risk of tyre blowouts.
Why Hot Weather Causes Car Problems
While cold weather gets most of the bad press for automotive trouble, heat is actually harsher on your car’s critical components.
Hot weather car problems include:
Engine Overheating
Driving in summer forces your engine to run hotter.
If your coolant level is low, your radiator is blocked, or your thermostat is sticking, the cooling system can’t dissipate heat fast enough.
Extreme overheating can quickly lead to severe damage, including blown head gaskets or warped engine heads.
Tyre Stress & Pressure Spikes
As ambient temperatures rise, air inside your tyres expands.
Combined with friction from high-speed driving on hot asphalt, under-inflated or worn tyres are far more likely to suffer tread separation or a dangerous blowout.
Battery Failure
Heat accelerates internal corrosion in car batteries and evaporates essential electrolyte.
A battery that was already weakened during the winter can easily fail when summer heat forces it to work overtime to start the vehicle and power electrical accessories.
Air Conditioning Breakdown
Your car’s air conditioning works hardest during heatwaves.
Low refrigerant levels or a failing compressor can leave you without cool air when you need it most.
Brake Fade & Fluid Degradation
Heavy summer traffic and hilly driving place extra demand on your braking system.
Overheated brake pads lose friction (brake fade), while moisture-contaminated brake fluid can boil, causing a spongy pedal feel and reduced stopping power.
Critical Summer Checks to Keep Your Car Cool
To prevent unexpected hot weather car problems, keep an eye on these key areas:
Coolant Levels
Ensure your engine coolant (antifreeze and water mix) is topped up to the correct mark when the engine is cold.
Never open the reservoir cap while the engine is hot.
Tyre Pressures & Tread Depth
Check your tyre pressures when they are cool.
Ensure you’re following your vehicle manufacturer’s recommended PSI settings, and inspect for cracks, bulges, or uneven wear.
Air Conditioning
If your air conditioning is blowing warm air or struggling to cool the cabin, it likely needs a professional re-gas or leak test.
Essential Fluids
Engine oil, windscreen washer fluid, and brake fluid all play key roles in keeping your vehicle running smoothly in high temperatures.
Beat the Heat with D&A Automotive
At D&A Automotive, our expert team provides comprehensive service and repairs for all makes and models of vehicles.
Whether you need an air conditioning service and re-gas, a thorough cooling system check, brake repairs, or routine summer servicing, we’re here to ensure your vehicle gets the care it deserves.
Don’t let summer heat leave you stranded; contact us today.
