Why Is My Car Overheating?

An overheating car should never be ignored. When the temperature gauge rises, steam appears, or a coolant warning light turns on, the engine may be at risk of serious damage.

The cause may be simple, such as low coolant, or more serious, such as a radiator leak, failing water pump, bad thermostat, cooling fan problem, or head gasket issue.

If your car is overheating in San Diego traffic, pull over safely, turn off the engine, and allow the vehicle to cool before checking anything.

Common Reasons a Car Overheats

Low Coolant

Coolant helps remove heat from the engine. If the coolant level is low, the engine may overheat quickly.

Low coolant often means there is a leak somewhere in the system. Common leak points include hoses, radiator seams, the water pump, coolant reservoir, heater core, or thermostat housing.

Radiator Leak or Blockage

The radiator helps release heat from the coolant. If it leaks, becomes clogged, or has damaged fins, the cooling system may not control engine temperature properly.

Signs of a radiator problem may include coolant under the vehicle, steam, overheating at idle, or a sweet smell near the engine.

Bad Thermostat

The thermostat controls coolant flow through the engine. If it gets stuck closed, coolant may not circulate correctly, causing the engine temperature to rise.

Failing Water Pump

The water pump moves coolant through the engine and radiator. A failing pump may leak, make noise, or stop circulating coolant properly.

Cooling Fan Problem

Cooling fans help control temperature when the vehicle is stopped or moving slowly. If the car overheats mainly in traffic, a fan, relay, fuse, sensor, or wiring issue may be involved.

What Should You Do If Your Car Overheats?

If the temperature gauge rises or you see steam:

1. Turn off the AC.

2. Move to a safe location.

3. Shut off the engine.

4. Do not open the radiator cap while hot.

5. Wait for the engine to cool.

6. Call for help if coolant is leaking or the warning light stays on.

Opening a hot cooling system can cause serious burns. Always let the vehicle cool first.

Is It Safe to Keep Driving?

Driving with an overheating engine is risky. Even a short distance can damage the engine, head gasket, radiator, or other components.

Do not continue driving if:

• The temperature gauge is high

• Steam is coming from the hood

• Coolant is leaking heavily

• A warning light appears

• The engine loses power

• You smell burning coolant

• The vehicle feels unsafe

Towing may be safer and less expensive than causing major engine damage.

How OWL-LET May Help

OWL-LET provides diagnostics, maintenance, and auto repair services for San Diego drivers.

Members may receive:

• Free diagnostics

• Qualifying parts at cost

• Member labor pricing

• Cooling system inspection

• Roadside benefits depending on the selected plan

Membership plans start at $24.99 per month.

Cooling system repairs vary by vehicle and issue. The problem may require coolant, hoses, radiator service, thermostat replacement, water pump repair, fan diagnostics, or other work.

Schedule Cooling System Service in San Diego

If your car is overheating, leaking coolant, or showing a high temperature warning, schedule an inspection before the issue becomes worse.

OWL-LET Service Center
1739 Palm Ave, San Diego, CA 92154

Phone
+1 (619) 777-0031

OWL-LET can inspect the cooling system, identify leaks, and explain the repair options before work begins.

Service availability, diagnostics, pricing, parts, coolant, and membership benefits vary by vehicle and selected plan.