Diyvehiclerepair
- Why does my fan come on as soon as I start my car?
- Why does my car cooling fan keep running?
- What causes an engine to keep running after turned off?
- Why won't my cooling fan shut off?
- Is the radiator fan always supposed to be running?
- How do I know if my thermostat or water pump is bad?
- How do I know if my thermostat is stuck closed?
- Where is the relay switch for a radiator fan?
- How do you diagnose cooling fan problems?
Why does my fan come on as soon as I start my car?
If the fan comes on, you may have a bad temperature sensor or gauge. 2. A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause the fan to run continuously any time you turn the ignition key on or start the engine. Troubleshoot the switch.
Why does my car cooling fan keep running?
3. Cooling fans stay on at all times. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.
What causes an engine to keep running after turned off?
Answer: After the engine is shut off, its temperature rises. This excessive heat and pressure in the combustion chamber is what causes detonation, which ignites the residual fuel-air mixture in there.
Why won't my cooling fan shut off?
The most common reason that your Air Conditioner fan won't turn off is because a stuck relay keeping the circuit closed. ... Double-check the thermostat and make sure the fan is not set to ON, and that it still runs when switching it to AUTO or OFF (if your thermostat has an OFF setting).
Is the radiator fan always supposed to be running?
Temperature will often determine the time that a radiator fan starts up. A temperature-sensitive switch functions to turn the fan on and off periodically. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit.
How do I know if my thermostat or water pump is bad?
Answer: If the temperature gauge indicates the engine is overheating, the water pump bearing may be faulty and not allowing coolant to circulate properly. Another possibility is the thermostat is not functioning right. Depending on your particular model, you can try to listen to the pump with a length of hose.
How do I know if my thermostat is stuck closed?
The coolant should warm to the right temperature and begin to flow after 10 to 20 minutes. If it does not start to flow, but the temperature gauge on your dashboard rises, your thermostat is stuck closed. If your coolant flows normally, there may be another cause of your overheating engine.
Where is the relay switch for a radiator fan?
The fan relay is usually located near the bottom of the engine compartment on a metal frame member. The metal acts as a heat sink to keep the fan relay cool. So, unplug the connector at the relay and repeat the check for power.
How do you diagnose cooling fan problems?
To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees. If the fan does not come on, something in the control circuit is defective.
