Temperature gauge not working – symptoms, causes, fixing

Are you concerned about your damaged temperature gauge not working? Don’t worry, here you will find simple solutions to diagnose and fix the broken temperature gauge. You can easily learn to repair and maintain this important car component in no time.


The temperature gauge in your vehicle is responsible for letting you know if your engine is operating at an ideal temperature or if it’s at risk of overheating. If you notice that your temperature gauge is not working as it should, it can be concerning and may require immediate attention.

In most cases, a malfunctioning temperature gauge is caused by a faulty sensor or wiring issue. You may also find that the problem stems from a blown fuse or a corroded connector.

It’s essential to address this issue promptly to avoid any severe damage to your vehicle engine. If your temperature gauge is reading too high or too low or is not reading at all, it’s recommended to have it diagnosed and repaired by a certified mechanic.

Causes of Temperature Gauge Not Working

A temperature gauge is an essential component of any vehicle’s cooling system. There are several reasons why a temperature gauge may stop working correctly, and it’s vital to identify the root cause of the issue to avoid further damage to your car’s engine.

Here are some possible causes of a malfunctioning temperature gauge:

  1. Faulty thermostat: A stuck or broken thermostat can cause inaccurate temperature readings.
  2. Water pump failure: A malfunctioning water pump can lead to engine overheating and inaccurate temperature readings.
  3. Faulty temperature sensor: The temperature sensor can suffer from electrical issues, causing incorrect temperature readings.
  4. Blown fuse: A blown fuse can prevent the temperature gauge from working altogether.

Pro tip: If you notice your temperature gauge not working, it’s crucial to have it checked by a qualified mechanic to avoid any further damage to your vehicle’s engine.

Troubleshooting the Temperature Gauge

A malfunctioning temperature gauge can be a frustrating issue to deal with. Here are some troubleshooting tips to help you identify and fix the problem:

  • Check the power source: Ensure the gauge is receiving sufficient power, and the wiring is not damaged or disconnected.
  • Inspect the sensor: A broken or faulty sensor can lead to inaccurate temperature readings. Consider replacing the sensor if it is damaged or not working correctly.
  • Clean the gauge: Dirt and debris can affect the gauge’s accuracy. Clean the gauge thoroughly and remove any buildup or contaminants on the surface.
  • Verify calibration: If your gauge is calibrated, make sure it’s not out of calibration. Check the manual for instructions on how to recalibrate the gauge.

If the above tips don’t solve the problem, it’s best to seek professional assistance to diagnose and fix the issue.

Pro tip: Regular maintenance of the temperature gauge can prevent many issues from occurring in the first place.

Diagnosing the Temperature Gauge

If your car’s temperature gauge is not working, it can be caused by various problems that can impact your car’s engine performance and safety. To diagnose the temperature gauge, here are the steps you should follow:

  1. Check the coolant level: Low coolant levels can cause the temperature gauge to malfunction. Make sure there is enough coolant in the radiator.
  2. Inspect the thermostat: A faulty thermostat can cause the gauge to show low or high readings. Check if the thermostat is sticking or not opening properly.
  3. Test the temperature sender: The temperature sender sends a signal to the gauge; if it’s faulty, it can cause the gauge to malfunction. Use a multimeter to check the sender’s resistance.
  4. Inspect the wiring: Corrosion or damage to the wiring can cause a weak signal, causing the gauge to malfunction. Check the wiring from the sender to the gauge.

Pro tip: If the problem persists, consult a mechanic to diagnose and fix the problem.

Replacing the Temperature Gauge

If your temperature gauge is not working, replacing it is a relatively simple process that you can do yourself with a few basic tools and some careful attention to detail. Here’s how to do it:

  1. Disconnect the negative terminal on the battery.
  2. Locate the temperature gauge on your dashboard and use a screwdriver to remove the panel that is covering it.
  3. Use a wrench to loosen and remove the nuts holding the gauge in place.
  4. Gently pull the gauge out of the dashboard and detach the electrical connection.
  5. Connect the new gauge to the electrical connection.
  6. Place the gauge back into the dashboard and use the nuts to secure it into place.
  7. Reattach the panel covering the gauge with screws.
  8. Reconnect the negative terminal on the battery and test the new gauge to ensure it’s working properly.

Pro tip: If you’re uncertain about the process, always consult your vehicle’s manual or a professional mechanic before attempting any repairs on your own.

Tips for Maintaining the Temperature Gauge

When your temperature gauge is not working, it can be frustrating and potentially dangerous. Here are some tips for maintaining your temperature gauge to prevent it from malfunctioning:

  1. Check the gauge regularly: Make sure the gauge is working correctly by checking it regularly.
  2. Keep it clean: Dirt and debris can obstruct the gauge and affect its accuracy, so clean it regularly with a soft cloth.
  3. Calibrate the gauge: Calibrate the gauge annually or when you suspect it’s not giving accurate readings.
  4. Keep an eye on the engine: Watch for any signs of overheating or unusual engine behavior, such as steam or smoke.

By following these tips, you can maintain your temperature gauge’s accuracy and prevent a potential breakdown on the road.

Pro Tip: If you notice that your gauge is not working correctly, take your vehicle to a certified mechanic for inspection and repair.

Common Questions about Temperature Gauge Malfunction

If you are experiencing temperature gauge malfunction issues, you may have a few common questions. Here are some answers to the most frequently asked questions about temperature gauge malfunction:

  • Q. What could be the reason for my temperature gauge malfunction?
    A. The most common reasons for a malfunctioning temperature gauge are the failed gauge itself, a blown fuse or a disconnected wire, or a malfunctioning thermostat.
  • Q. How can I test if the temperature gauge is working correctly?
    A. You can test your vehicle’s temperature gauge by using a multimeter and checking for continuity within the wires.
  • Q. What should I do if my temperature gauge still isn’t working?
    A. If your temperature gauge isn’t working, you should take your vehicle to an experienced mechanic who can diagnose the problem and make necessary repairs.

Remember, it’s essential to address temperature gauge malfunction issues early to prevent overheating and other potential engine problems.


In conclusion, if your temperature gauge is not working on your vehicle, it is crucial to address the issue as soon as possible. A faulty temperature gauge can lead to severe engine damage and compromise your safety on the road.

There are several common reasons why a temperature gauge may not be working, such as a malfunctioning sensor, a blown fuse, or a broken wire. These issues can be diagnosed and repaired by a qualified mechanic.

Regular vehicle maintenance, including routine checks on the temperature gauge, can help prevent costly engine repairs and ensure your vehicle’s continued performance. Don’t overlook any issue with your temperature gauge, and seek expert help to resolve the issue.


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