An overheating engine is one of the few car problems you must act on immediately, especially on UAE roads where summer temperatures push past 45°C. Knowing exactly what to do when a car overheats can be the difference between a quick roadside stop and a ruined engine that costs thousands of dirhams to repair.
This guide walks you through the safe steps to take the moment the temperature gauge climbs into the red, what to check once the engine cools, when to call for help, and how to prevent it from happening again.
Quick Answer
If your car starts overheating: turn off the air conditioning, turn the heater on full blast, pull over safely as soon as possible, and switch the engine off. Wait at least 30 minutes before opening the hood, and never open the radiator cap while the engine is hot. Once it cools, check the coolant level in the reservoir and top up if needed. If the level is fine or the car keeps overheating, do not keep driving — call roadside assistance instead.
How to Recognize That Your Car Is Overheating
Most drivers notice the problem through the temperature gauge or a dashboard warning light. If your gauge needle climbs into the red zone, or a red thermometer symbol lights up, the engine is running hotter than it should. Learn to read these signs early with our guide on how to recognize engine overheating so you can react before serious damage happens.
Other warning signs include:
- Steam or smoke rising from under the hood
- A strange sweet smell (leaking coolant) or a burning smell
- A sudden loss of engine power or unusual ticking and thumping noises
- Coolant puddles under the car after parking
What to Do When a Car Overheats: Step-by-Step
The moment you see the temperature gauge in the red or a warning light appears, follow these steps in order.
1. Turn Off the AC and Turn the Heater On Full
Switch off the air conditioning immediately — the AC compressor puts extra load on the engine. Then turn the heater to maximum heat and full fan speed, and open the windows. This pulls heat away from the engine into the cabin. It will be uncomfortable, but it can buy you precious minutes while you find a safe place to stop.
2. Pull Over Safely and Stop the Engine
Slow down gradually and pull onto the shoulder, a parking bay, or the nearest safe spot. Turn on your hazard lights. Once stopped, switch the engine off. On a busy road like Sheikh Zayed Road, keep your seatbelt on until you can exit safely from the side away from traffic. Remember that sudden stopping on a highway can attract a penalty — the general UAE traffic fines guide is worth reading so you know the rules for emergency stops.
3. Wait — Do Not Open Anything Yet
An overheated engine is under pressure. Wait at least 30 minutes (45 in UAE summer heat) before touching the hood latch, and never open the radiator or coolant cap while the system is hot. Pressurized coolant can erupt as boiling steam and cause severe burns.
4. Check the Coolant Level Once Cool
When the engine is cool to the touch, look at the coolant reservoir — the translucent plastic tank near the radiator. If the level is below the “MIN” mark, top it up with the correct coolant for your car (check your owner’s manual). For a proper walkthrough, see how to check coolant level. If you don’t have coolant, clean water works as a temporary emergency measure to reach a garage — but have the system flushed and refilled with proper coolant afterwards.
5. Decide Whether It Is Safe to Continue
Restart the engine and watch the temperature gauge. If it stays in the normal range and there are no leaks or steam, you may drive slowly to the nearest workshop. If the needle climbs again within a few minutes, switch off and call roadside assistance — continuing to drive an overheating engine can warp the cylinder head or crack the engine block.
Why Cars Overheat in the UAE
Understanding the causes helps you prevent a repeat. The most common reasons include:
- Low coolant level — the single most common cause, often from a slow leak in a hose, the radiator, or the water pump
- Faulty thermostat — a stuck-closed thermostat blocks coolant circulation
- Radiator problems — blocked, corroded, or damaged radiators can’t shed heat effectively
- Broken cooling fan — if the electric fan doesn’t kick in, the engine overheats in traffic
- Worn drive belt or failed water pump — without circulation, coolant can’t do its job
- Extreme heat and traffic — long idling in Dubai summer traffic with the AC at full blast pushes every cooling system to its limit
Regular servicing catches most of these before they strand you. Our article on car maintenance mistakes to avoid lists the skipped checks that most often lead to breakdowns.
What NOT to Do When Your Engine Overheats
- Don’t keep driving. Even “just a few more kilometres” can destroy the engine.
- Don’t open the radiator cap while hot. Scalding steam and coolant can cause serious injuries.
- Don’t pour cold water into a hot engine. The sudden temperature shock can crack engine components.
- Don’t ignore the warning light. A temperature warning that goes away on its own is still worth investigating at a workshop.
When to Call Roadside Assistance
Call for help if any of the following apply:
- The engine overheats again shortly after restarting
- You see steam, major leaks, or coolant pouring out
- The coolant reservoir is cracked or the radiator is visibly damaged
- You’re on a highway or in an unsafe spot to wait it out
Most car insurance policies in the UAE include roadside assistance, so check your policy documents or insurer’s app before paying for a tow. Save the assistance number in your phone now, not during an emergency.
How to Prevent Overheating in UAE Heat
Prevention is cheaper than repair. Build these habits into your routine, especially before summer:
- Check the coolant level monthly and before long trips — low coolant is a fix that takes two minutes
- Inspect hoses for cracks, bulges, or soft spots every few months
- Keep the radiator grille clear of dust, sand, and debris; a gentle rinse helps airflow
- Service your car on schedule, including coolant flushes at the intervals your manufacturer recommends
- In traffic, watch the gauge — if it starts climbing, turn the AC down a notch and the heater up while you head for a stop
Summer preparation covers more than cooling: see how to prepare a car for summer for the full checklist, including battery and tire checks that matter in high heat. The RTA also recommends regular vehicle inspections to keep cars roadworthy in Dubai’s climate.
How Much Does It Cost to Fix Overheating Damage?
Costs depend on what caused the problem and how far it went:
| Repair | Typical UAE cost range |
|---|---|
| Coolant top-up / leak repair (hose) | AED 100–400 |
| Thermostat replacement | AED 250–600 |
| Radiator replacement | AED 800–2,500 |
| Water pump replacement | AED 600–1,800 |
| Head gasket / warped head repair | AED 2,000–6,000+ |
| Full engine rebuild | AED 8,000+ |
These are typical workshop ranges — prices vary by car make, model, and whether you use an agency or independent garage. Always get a written quote, and know your rights: UAE consumer protection laws cover automotive repair services, so you’re entitled to a proper invoice and quality workmanship.
Frequently Asked Questions (FAQs)
Can I drive my car if the temperature gauge is in the red?
No. Driving with the gauge in the red risks warping the cylinder head or cracking the block — damage that turns a small repair into an engine replacement. Pull over and switch off as soon as it’s safe.
How long should I wait before opening the hood after overheating?
Wait at least 30 minutes, and longer in UAE summer heat. The engine should be cool to the touch before you touch the hood or check fluids. Never open the radiator or coolant cap while the engine is hot.
Is it safe to put water in the radiator instead of coolant?
In an emergency, clean water will get you to the nearest garage. It is not a substitute for proper coolant, which protects against corrosion and raises the boiling point. Have the system drained and refilled with the correct coolant as soon as possible.
Why does my car overheat only in traffic?
This usually points to a failing electric cooling fan or a partially blocked radiator. At speed, airflow through the grille does the cooling work; in traffic, the fan must take over. If the fan doesn’t kick in, the temperature climbs at idle.
My temperature gauge goes up and down. Is that overheating?
Fluctuating temperature often means air trapped in the cooling system, a sticking thermostat, or coolant that’s low enough to slosh away from the sensor. Get it checked — it usually gets worse, not better, on its own.
Does overheating affect my car’s registration or insurance?
Overheating itself doesn’t, but the resulting damage can fail a vehicle inspection at registration renewal time. Keeping your car maintained also supports a clean claims record with your insurer.
The Bottom Line
What to do when a car overheats comes down to five quick actions: kill the AC, turn the heater on full, pull over safely, switch off, and wait before touching anything. Most overheating episodes in the UAE trace back to low coolant or a worn cooling-system part — both cheap to fix when caught early. Check your coolant monthly, service the car on schedule, and never gamble on driving with the gauge in the red. Your engine, and your wallet, will thank you.
Last Updated: 8 October 2026
About the author: Zaviyar Sultan is a UAE-focused writer at Paxi, covering driving, visas, banking, insurance and everyday UAE life. His guides are researched from official UAE government and regulator sources and updated regularly.
Paxi is an independent informational website, not affiliated with the UAE government or any agency mentioned; content is general information only, not legal, immigration or financial advice; verify critical details with official sources before acting.