The Most Common Car Problems We See During Arizona Summers
Reviewed by Eric Shepherd, Gemba Automotive ASE-Certified Technician
By the time you leave work in July, the steering wheel is too hot to touch, the seatbelt buckle feels like a branding iron, and your car has been baking in the sun for eight straight hours. Each year, summer months turn daily commutes to and from work and school into endurance tests for Arizona drivers and their cars.
At Gemba Automotive, we see an increase in heat-related issues each summer. From overheating engines to failing batteries and struggling air conditioning systems, Arizona's beautifully sunny and extreme climate creates its own set of challenges.
Here is a look at some of the most common car problems we see during Arizona summers:
Why Your Engine Overheats Faster During Phoenix Summers
During the summer, your vehicle's cooling system is working overtime before you even leave the driveway. It was designed to handle high ambient temperatures, but the Phoenix heat can sometimes overwhelm the system, especially if it has dried out or cracked hoses, a bad thermostat, clogged or bent fins on the radiator, low coolant levels, bad water pumps or failing radiator fans.
When outside temperatures sit between 110 and 118 degrees for days at a time with overnight lows sitting the mid-90's, we see many vehicles engine and the cooling system working harder just to stay within its normal operating range. Sitting in bumper-to-bumper traffic on I-10 at 5 p.m. with the A/C blasting is about the hardest test your cooling system can face.
Most overheating problems start small. You will notice the temperature gauge starting to creep higher, or the A/C suddenly stops feeling as cold while you're waiting at a red light. Some vehicles have a dashboard warning light.
Drivers who ignore these warning signs often end up dealing with severe overheating and expensive engine damage. Some of the most common damage we see includes warped cylinder heads or blown head gaskets.
Why Your Battery Keeps Dying in Hot Weather
It's well known that the Arizona heat is notoriously brutal on car batteries. The heat speeds up the chemical reactions that take place within the battery, causing the fluid to evaporate quickly. This leads to internal damage that can weaken the batteries' ability to hold a charge. Nothing ruins a Phoenix summer afternoon faster than loading groceries into the car only to hear clicking instead of the engine starting.
Some of the most common symptoms of a failing battery include slow engine cranking, clicking noises when turning the key, flickering dashboard lights, or the worst-case scenario: your car just doesn't turn on.
For Phoenix drivers, getting your car's battery inspected before peak summer months can help prevent getting stranded on the side of the road or the Costco parking lot. It also gives you the opportunity to clean off any corrosion buildup around the battery terminals that could interfere with the electrical components. Extreme heat can also affect the alternator, especially when air conditioning systems are running full blast.
Why Car A/C Systems Fail in Arizona Heat
In Arizona, your vehicle's air conditioning system is a survival necessity, especially because in-cabin temperatures can exceed 140 degrees when you're at work and the car is sitting outside waiting for you. We have all seen the memes about baking cookies on your dash, it's a real thing. So, if the inside of your vehicle can get hot enough to legitimately bake cookies, you definitely need working A/C to keep you cool, especially if you have a long commute. Some of the most common airflow or cooling problems we have seen roll into our shop include a weak condenser or condenser blockage, weak condenser fans, compressor issues, and low refrigerant levels.
Phoenix rush hour exposes weak A/C systems fast, especially when your car is sitting on heat-soaked pavement surrounded by traffic and airflow is reduced. Because the heat dries things out quickly, refrigerant leaks are one of the most common problems Arizonians face due to the desert climate drying out rubber seals and hoses. Once refrigerant levels drop, the system loses its ability to cool efficiently.
The A/C compressor also takes a real beating in the desert heat because it often runs at near-constant capacity for months at a time. The excessive strain and heat can cause compressor failure. Small A/C issues caught early on are usually far less expensive than waiting for a full system failure during the hottest part of the summer.
Why Tire Problems Get Worse During Arizona Summers
There's a reason you see so many shredded tires on the side of the 101 and the 202 during summer. Phoenix summers bring extreme heat that can cause the air inside your tires to expand, thus increasing the pressure. On scorching Phoenix afternoons, tires rolling across Arizona pavement can become dangerously overinflated if they were already filled near maximum pressure.
On the other hand, underinflated tires are also extremely dangerous in desert heat because they create excess friction and heat buildup. This increases the risk of blowouts, especially during long freeway drives at high speeds.
The intense UV exposure from the sun also accelerates rubber deterioration. Just like the rubber hoses dry out under the hood, your tires can appear fine on the outside but may actually have weakened internal structures caused by prolonged heat exposure.
Arizona Summers Expose Every Weakness Your Car Already Has
Most Arizona drivers learn to live with the heat. Our cars don't always handle it as well. Sometimes we forget how much stress the heat can put on things like the engine, cooling system, tires and air conditioning components. We have seen that problems often show up quickly during Arizona heat waves.
The good news is that many major summer breakdowns can be prevented with regular maintenance and early inspections. Checking coolant, testing batteries, monitoring tire pressure, and addressing A/C problems early can dramatically reduce the chances of getting stranded during the hottest months of the year.