Q: Car overheats after 25 minutes

asked by on

My car starts to overheat when sitting for more than 25 minutes. I may need to replace the thermostat.

Hello! A stuck closed thermostat will cause a vehicle to overheat in about that time. A coolant leak, bad fan operation, or a leaking head gasket will produce similar overheating conditions. I suggest having the coolant system inspected by a certified technician, such as one from YourMechanic. When inspecting the system have them check for leaks, fan operation, thermostat operation and also test the head gasket.

It is likely that the thermostat is causing the car to overheat. If this is found to be the case, I would recommend having your thermostat replaced. However, it is also likely that the fans are not functioning properly since the fans are designed to turn on after about 25 minutes of running to keep the vehicle from overheating. If the fans don’t turn on the vehicle will overheat.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car overheats after 25 minutes

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: grinding noise while driving straight?

A possibility is a faulty wheel bearing. Less common possibilities are interference with the brake rotor and transmission failures. A faulty wheel bearing can be diagnosed, on the road, by driving the car in such a way that you "sequentially...

Q: Heater core or thermostat

If the engine temperature, as measured on the dash gauge, does not reaching the normal operating range within "roughly" 5 miles or so of driving, then a possibility is the cooling system thermostat is stuck open. Among other things, a...

Q: Hello I have multiple cylinder misfire codes and I've replace the spark plugs, wires, distributor cap and rotor, and there is also

You should have the fuel checked to see if there is water in the fuel. This will cause misfires. If fuel is not the issue and you already replaced ignition components then suspect clogged injectors. For the transmission slip this...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.