Where is the relay for cooling 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. If you get power, you’ve got a bum relay.

What happens when cooling fan relay goes out?

If the relay fails, it will be unable to supply power to the fans, and as a result they will not operate. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator.

How do I know if my fan relay is bad?

Keep a lookout for the following bad cooling fan relay symptoms:

  1. The engine runs hot or overheats.
  2. The cooling fans don’t work.
  3. The cooling fans keep running.
  4. Warning lights.
  5. Poor air conditioning performance.
  6. Swapping Relays.
  7. Measuring the Relay Coil’s Resistance.
  8. Listening for Noises.

How do I know if my cooling fan relay is bad?

Bad Cooling Fan Relay Symptoms

  1. The engine runs hot or overheats.
  2. The cooling fans don’t work.
  3. The cooling fans keep running.
  4. Warning lights.
  5. Poor air conditioning performance.
  6. Swapping Relays.
  7. Measuring the Relay Coil’s Resistance.
  8. Listening for Noises.

How do I know if my radiator fan fuse is bad?

Bad Radiator Fan Symptoms

  1. Fan Doesn’t Come On. The most common symptom that the radiator fan has gone bad is that it will stop working.
  2. Blown Radiator Fan Fuse. Another reason the fan will stop working is if it blows a fuse.
  3. Vehicle Overheating.
  4. Poor A/C Performance.
  5. Whirring Noises.

What sensor controls the radiator fan?

coolant temperature sensor
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor.

Should both my radiator fans turn on?

Both fans should come on when the A/C is on. If one or both fans fail to come on, the lack of additional cooling provided by the fan may cause poor A/C cooling performance, and it may cause the A/C compressor to overheat and fail. The engine may also run hot and overheat, too.

What happens if AC relay goes bad?

When a relay is starting to fail, it may give weakened or intermittent power to the compressor, which will result in weakened or intermittent function of the AC. The AC may function fine in one instance, and then shut off, or deliver inconsistent performance in another.