My AutoPlace

Engine temperature warning light: what it means and what to do

Red thermometer in waves

Stop nowPull over safely as soon as you can and get help.

The engine is overheating. Stop as soon as it's safe and switch off. Never open the radiator cap while the engine is hot.

What it means

The coolant that keeps the engine at working temperature is too hot. Driving on can warp the cylinder head and cause a very expensive repair. A blue thermometer on some cars only means the engine is still cold, which is normal.

Can I keep driving?

No. Let it cool and get it checked.

What to do now

  1. Pull over and switch the engine off.
  2. Wait at least 30 minutes before touching anything under the bonnet.
  3. Once it's cool, check the coolant level in the see-through tank. If it's low or you see a leak, call for roadside help rather than driving.

Common causes

  • Low coolant from a leak
  • A failed water pump or broken belt
  • A stuck thermostat
  • A radiator fan that isn't working

Shops near you that can check this

Closest first. Your location stays on your phone.

Car Lab

Auckland CBD

Mechanics · WOF stations

Free written quote, or call to book

CallSee shop

M Tech

Henderson

Mechanics

Free written quote, or call to book

See shop

AZ Autos

Papatoetoe

Mechanics · WOF stations

Free written quote, or call to book

See shop

AB Autos

Panmure

Mechanics · WOF stations

Free written quote, or call to book

See shop

Fredco

Kingsland

Mechanics · WOF stations

Free written quote, or call to book

CallSee shop

VIRLTD

Onehunga

Mechanics · WOF stations

Free written quote, or call to book

CallSee shop

See all mechanics in this suburb

Questions drivers ask

Can I drive with the engine temperature warning light on?

No. Let it cool and get it checked.

What does the engine temperature warning light mean?

The engine is overheating. Stop as soon as it's safe and switch off. Never open the radiator cap while the engine is hot.

What should I do when the engine temperature warning light comes on?

Pull over and switch the engine off. Wait at least 30 minutes before touching anything under the bonnet. Once it's cool, check the coolant level in the see-through tank. If it's low or you see a leak, call for roadside help rather than driving.

Need a tow? Call now

If anyone is hurt or you're in danger, call 111 first. Get off the road and wait behind the barrier.

Call AA Roadservice 0800 500 222

Members and non-members can call. Have your location and rego ready.

Other numbers to try

  • Your insurer's roadside line. Many policies include a free tow, and it's on your policy card or app.
  • Your car maker's roadside assistance, if the car is new enough.
  • A local tow company. Search "tow truck" with your suburb, and ask the price before you agree.

Need it fixed after? Find a shop near you and call them.

Book

What for?

Free to book. The shop texts to confirm, and gives you a written quote before any work.