Why Is My Car Overheating? 5 Possible Causes

When your car starts overheating, it’s not just an inconvenience — it’s a sign that something is seriously wrong under the hood. Whether it happens while you’re idling or cruising on the highway, an overheating engine can lead to costly repairs if left unresolved. But what causes it, and how do you know when it’s time to take action?

Let’s explore the most common reasons for engine overheating and the signs to watch out for.

My Car Overheating? 5 Possible Causes

Key Causes of Overheating

  1. Low Coolant Levels
    • Warning Signs: One of the most common causes of overheating is low coolant levels. If your engine is running hot and you notice the coolant reservoir is low, this could be the issue.
    • What to do: If you suspect a coolant issue, it’s essential to get a coolant system inspection before the problem worsens.
  2. Faulty Thermostat
    • Warning Signs: The thermostat regulates the flow of coolant through the engine. If it gets stuck, your engine can quickly overheat.
    • What to do: A faulty thermostat can lead to serious overheating problems. If you notice your temperature gauge rising, it’s best to book a thermostat check.
  3. Clogged Radiator
    • Warning Signs: Dirt and debris can block the radiator, preventing it from cooling the engine effectively. If your car overheats after long drives, a clogged radiator could be to blame.
    • What to do: If you suspect your radiator is clogged, get a radiator inspection to avoid more severe damage.
  4. Water Pump Failure
    • Warning Signs: The water pump helps circulate coolant throughout the engine. If it’s not working, your engine will overheat quickly. Look for leaks or grinding noises near the water pump.
    • What to do: Water pump issues should be addressed immediately to avoid engine damage. Book a water pump service if you notice these signs.
  5. Broken Cooling Fan
    • Warning Signs: The cooling fan pulls air through the radiator to help keep the engine cool, especially when idling. If the fan fails, your car will overheat, particularly in traffic or at low speeds.
    • What to do: A faulty cooling fan should be repaired quickly to prevent overheating. Get a cooling system service if your fan stops working.
Car Engine Temperature Sensor

What Should You Do Next?

If your car starts overheating, pull over and turn off the engine as soon as possible to avoid permanent damage. Don’t wait for the issue to escalate. Book a cooling system inspection with Pulse Automotive today, and we’ll diagnose and fix the problem before it leads to expensive repairs.

Auto Service & Repairs Adelaide​

Why Choose Pulse Automotive?

At Pulse Automotive, we have the expertise to quickly diagnose and fix overheating issues before they cause further damage. From thermostat replacements to full radiator repairs, our team is here to help.

Don’t risk severe engine damage — schedule a service appointment today, and we’ll ensure your car stays cool and reliable.

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Got an issue you need fixing or want something checked out? Make a booking and our team can get everything running like clockwork.

Testimonials

5/5

Went to pulse with a persistent idle an low power problem, they had a quick look right there and then eve though I didn’t have an appointment. They quickly diagnosed the issue busted vacuum hose and cleaned the MAS, car now runs like silk, very happy with friendly service and can do attitude.

rk850
23 June 2018

5/5

The service was absolutely fantastic. So efficient, affordable and the process was easy! They had a loan car for me and my car was ready within only a few hours! Definitely recommend pulse automotive to anyone!

sarahg347
02 December 2017

5/5

I’ve been a few times and have always been treated with respect and courtesy. The staff explain clearly the nature of the work and provide options if relevant. The work has been clean and timely, communication clear and effective. Thankyou.

richardg654
08 February 2018