Tempstar Furnace Troubleshooting: Quick Fixes for No Heat

If you are experiencing issues with your Tempstar furnace, such as lack of heat or blower not working, you can find troubleshooting videos and manuals online that provide step-by-step solutions. It is important to check if the furnace is receiving adequate power, clean or change the filters, and ensure proper thermostat settings.

Additionally, problems with the ignition system or dirty filters can also cause the furnace to fail. If you are unable to resolve the issue on your own, it may be necessary to call a professional for further assistance.

Credit: youtube.com

Common Tempstar Furnace Issues

When it comes to keeping your home warm and comfortable, a functioning furnace is essential. However, like any mechanical system, Tempstar furnaces can experience issues from time to time. Understanding the common problems that can arise will help you troubleshoot and resolve them quickly, ensuring your furnace operates efficiently throughout the winter months.

No Heat

One of the most frustrating issues you may encounter with your Tempstar furnace is a lack of heat. If your furnace is not providing any heat, there are several potential causes to consider:

  1. Check the thermostat settings to ensure they are set correctly. Make sure the thermostat is set to heat mode and the temperature is set higher than the current room temperature.
  2. Inspect the furnace filter and clean or replace it if necessary. A dirty or clogged filter can restrict airflow and prevent the furnace from producing heat.
  3. Verify that the gas supply to the furnace is turned on. If the gas supply is off, the furnace won’t be able to ignite and generate heat.
  4. Check the pilot light or ignition system. A faulty pilot light or ignition system can prevent the furnace from starting and producing heat. If you are unsure how to inspect or relight the pilot light, it’s best to contact a professional technician.
  5. Ensure that the electrical power to the furnace is connected and functioning properly. Check for tripped circuit breakers or blown fuses that may be interrupting the power supply.

Blower Not Working

If your Tempstar furnace is running, but the blower is not working, there are a few potential causes worth investigating:

  1. Check the thermostat fan setting. If the fan setting is set to “auto,” the blower will only operate when the furnace is actively heating. Switching the fan setting to “on” should activate the blower even if the furnace is not currently providing heat.
  2. Inspect the blower motor for any signs of damage or wear. A faulty or seized blower motor may need to be replaced by a professional technician.
  3. Verify that the blower wheel is clean and free from obstructions. A dirty or debris-filled blower wheel can hinder the blower’s performance and prevent it from operating effectively.
  4. Check for loose connections or faulty wiring that may be causing the blower to malfunction. If you are not familiar with electrical systems, it is best to consult a qualified technician.

Blinking Green Light

If you notice a blinking green light on your Tempstar furnace control board, it can indicate specific issues:

  • A fast, flashing green light typically means the blower system is working correctly, and the furnace is providing heat to your home.
  • A slow, flashing green light suggests that the furnace is on, but there is no request for heat. This could be due to issues with thermostat settings or other components.
  • A continuously lit green light indicates a potential problem with the integrated furnace control (IFC) circuit board. In this case, it may be necessary to replace the circuit board to restore proper function.

Remember, if you are not comfortable troubleshooting or resolving furnace issues on your own, it is always best to seek the assistance of a professional HVAC technician. They have the expertise and equipment to diagnose and repair any problems with your Tempstar furnace, ensuring your home stays warm and cozy all winter long.

Troubleshooting Steps

When troubleshooting a Tempstar furnace, follow these steps to identify and resolve issues. Check the filters, inspect the thermostat, ensure proper power supply, and consider professional assistance for more complex problems.

Checking The Filter

One of the first troubleshooting steps you should take when experiencing issues with your Tempstar furnace is to check the filter. A dirty filter can cause insufficient airflow, which can prevent the furnace from starting. To check the filter, follow these steps:

  1. Locate the filter compartment in your furnace.
  2. Remove the filter from the compartment and visually inspect it.
  3. If the filter appears dirty or clogged, it’s time to replace it.
  4. Install a new, clean filter in the compartment, making sure it fits securely.
  5. Turn on the furnace and see if the issue is resolved.

Thermostat Issues

If checking the filter doesn’t solve the problem, the next step is to examine the thermostat. The thermostat controls the temperature settings of your furnace, so any issues with it can result in heating problems. Follow these troubleshooting steps to check for thermostat issues:

  • Ensure the thermostat is set to the desired temperature.
  • Check if the thermostat display is working correctly.
  • If the display is off or not functioning properly, replace the batteries or troubleshoot the wiring.
  • Verify that the thermostat is correctly wired to the furnace.
  • If necessary, consult the Tempstar furnace manual for specific thermostat wiring instructions.

Power Supply

If the filter and thermostat are not the culprits, you should inspect the power supply to your Tempstar furnace. A lack of power can prevent your furnace from starting or operating efficiently. Follow these troubleshooting steps to ensure a proper power supply:

  1. Check if the furnace is plugged into a working electrical outlet.
  2. Inspect the circuit breaker or fuse box to make sure the furnace’s circuit is not tripped or the fuse is not blown.
  3. Reset the circuit breaker or replace the blown fuse if necessary.
  4. Ensure that the main power switch on the furnace itself is turned on.
  5. If all else fails, call a professional HVAC technician to diagnose and fix the power supply issue.

By following these troubleshooting steps, you can resolve common issues with your Tempstar furnace and ensure efficient heating throughout your home. Remember, if you’re unsure about any step or unable to fix the problem, it’s always best to seek professional help. Proper maintenance and regular inspections can also prevent future furnace problems and extend the lifespan of your Tempstar furnace.

Resetting And Troubleshooting The Furnace

Common Reasons For Furnace Failure

Furnace failure can occur due to various reasons, such as ignition failure, dirty filters, faulty thermostat settings, or restricted duct systems. Tempstar furnace troubleshooting can help identify and resolve these common issues, ensuring efficient heating and comfort in your home.

Ignition Failure

One of the most common reasons for furnace failure is ignition failure. When the ignition system is damaged, your furnace is unable to produce any hot air. This can leave you and your family in the cold during the winter months. Ignition failure can be caused by a variety of factors, including a faulty ignition switch, a dirty or damaged igniter, or a malfunctioning control board. If you notice that your furnace is not producing any heat, it’s important to have the ignition system checked and repaired by a professional HVAC technician as soon as possible.

Dirty Filters

Dirty filters are another common reason for furnace failure. Over time, filters can become clogged with dust, dirt, and other debris, restricting airflow and causing your furnace to work harder to heat your home. This increased strain can eventually lead to system failure. Regularly changing or cleaning your filters is crucial in maintaining the efficiency and longevity of your furnace. It’s recommended to check your filters every month and replace them if they appear dirty or clogged. By keeping your filters clean, you can prevent unnecessary strain on your furnace and avoid potential breakdowns.

Restricted Duct System

A restricted duct system is another common culprit behind furnace failure. When your ducts are obstructed or poorly designed, airflow is hindered, preventing proper heat distribution throughout your home. This can cause your furnace to overheat or shut down completely. Restricted ducts can be caused by a variety of factors, such as blockages from debris or damage to the ductwork. Regular maintenance and inspections can help identify any potential issues with your duct system and ensure proper airflow. If you suspect that your ducts are restricted, it’s important to contact a professional HVAC technician to assess and resolve the issue.

Calling A Professional

If you’re experiencing issues with your Tempstar Furnace, it’s best to call a professional for troubleshooting. Don’t worry, they’ll help you identify and fix the problem in no time.

When To Seek Professional Help

If you are experiencing issues with your Tempstar furnace and have already tried troubleshooting on your own, it may be time to call a professional. While there are some simple problems that you can fix yourself, such as changing the filters or checking the thermostat, more complex issues require the expertise of a qualified technician. In this section, we will discuss when it’s appropriate to seek professional help, how to find a qualified technician, and the costs associated with repairs.

Finding A Qualified Technician

Finding a qualified technician to repair your Tempstar furnace is essential to ensure that the job is done correctly. Here are a few steps to help you find a reliable professional:

  1. Ask for recommendations: Start by asking friends, family, or neighbors if they have any experience with furnace repair technicians. Their personal recommendations can help you find someone trustworthy.
  2. Check credentials: Look for technicians who are licensed and certified in HVAC repair. This ensures that they have the necessary knowledge and skills to diagnose and fix the issue.
  3. Read reviews: Take the time to read online reviews and ratings of different technicians or companies. This can give you insights into the quality of their work and customer satisfaction.
  4. Get multiple quotes: Contact several technicians and request a quote for the repair job. This will give you an idea of the average cost and help you find the best deal.

Costs And Repairs

The cost of Tempstar furnace repairs can vary depending on the nature of the issue and the extent of the damage. Here are a few common repairs and their approximate costs:

  • Ignition system repair: A common failure in furnaces is the ignition system. Repairing or replacing this component can cost anywhere from $200 to $600.
  • Blower motor replacement: If your furnace’s blower motor is faulty, it may need to be replaced. This repair can range from $300 to $800, including parts and labor.
  • Circuit board replacement: If the IFC circuit board in your Tempstar furnace needs to be replaced, the cost can be around $500 to $1,000.
  • Regular maintenance: It is recommended to schedule regular maintenance for your furnace to prevent major repairs. The cost of annual maintenance can range from $100 to $300.

Please note that these are rough estimates, and it’s best to consult with a professional technician for an accurate quote based on your specific situation.

Remember, when it comes to complex furnace issues, it’s always best to seek the help of a qualified technician. They have the knowledge and experience to diagnose and repair problems efficiently, ensuring the longevity and optimal performance of your Tempstar furnace.

Frequently Asked Questions On Tempstar Furnace Troubleshooting

Where Is The Reset Button On A Tempstar Furnace?

The reset button on a Tempstar furnace is usually located near the blower motor. It is a small button that you can press to reset the furnace.

What Does The Blinking Green Light Mean On Tempstar Furnace?

The blinking green light on a Tempstar furnace indicates different things. If the green light is flashing fast, it means the blower system is working and the furnace is providing heat. If it is flashing slowly, the furnace is on but there is no heat request.

A continuous light suggests that the IFC circuit board needs replacing.

Why Is My Furnace Not Kicking On?

If your furnace is not kicking on, check the filter and ensure it is clean. Dirty filters can restrict airflow and prevent the furnace from starting. Other possible reasons include incorrect thermostat settings, gas line not turned on, or a faulty pilot light.

What Is A Common Failure For A Furnace?

A common failure for a furnace is ignition failure, which prevents the furnace from producing hot air. Other potential issues include a loose blower wheel, defective switch or connections, improper gas input adjustment, dirty filter or restricted duct system. It is recommended to call a professional for repair.

How Do I Troubleshoot A Tempstar Furnace?

Check for power supply, inspect the thermostat settings, and ensure the filters are clean.


If you’re experiencing issues with your Tempstar furnace, troubleshooting is key to getting it back up and running. From checking filters and thermostat issues to ensuring adequate power supply, there are several simple steps you can take to troubleshoot common problems.

Remember to clean and check drain tubes if your furnace has an internal condensate trap system, as a sticking pressure switch could be the culprit. If all else fails, don’t hesitate to call a professional for assistance. With the right troubleshooting techniques, you can ensure your Tempstar furnace stays in optimal working condition.

Leave a Comment