Skip to Content

How do you fix a pilot light that keeps going out?

Fixing a pilot light that keeps going out can be done by taking the following steps.

1. Turn off the gas supply to the appliance. Depending on the type of appliance you have, you may need to shut off the gas at the meter or the valve on the appliance.

2. Locate the pilot light. This is usually located under a panel near the bottom of the appliance.

3. Remove the pilot light assembly. Unscrew any screws or clips holding the pilot light assembly in place and remove it carefully.

4. Clean the pilot light holes and replace the thermocouple. Remove any dirt or debris from inside the pilot light holes and inspect the thermocouple to see if it needs to be replaced. If so, use a screwdriver to remove the thermocouple and replace it with a new one.

5. Reassemble the pilot light. Put the pilot light assembly back in place and reattach any screws or clips that secure it to the appliance.

6. Turn on the gas supply and relight the pilot light. Make sure that the gas is turned on at the meter or the valve and then use a match or lighter to relight the pilot light.

7. Check for a steady pilot flame. After the pilot is lit, wait for a few minutes to make sure that the flame stays lit and does not go out. If the flame does not remain lit, the problem may be with the appliance itself, and it may require further repair.

What do you do if your pilot light won’t stay lit?

If your pilot light won’t stay lit, there are several things you can do to get it back on. First, check for any drafts or blockages that may be preventing the flame from staying lit. If there are any, remove them.

You should also make sure all the gas valves are open and the thermostat is set in the ‘On’ position.

Next, you may need to clean or replace the thermocouple. If the thermocouple is damaged, the flame may not stay lit, so disabling it and cleaning it can help. If this doesn’t work, you may need to replace the thermocouple.

It’s also important to check the pilot light orifice for dirt or blockages. Unscrew the orifice and clean it out with compressed air. Replacing the orifice may be necessary if it is heavily blocked.

Once you have taken these steps, you can try to light the pilot light again. If done correctly, the flame should remain lit. If the flame still won’t stay lit, there may be an issue with the gas pressure.

In this case, you should contact a professional to determine the cause and provide a solution.

How do you clean a thermocouple?

Cleaning a thermocouple involves removing any debris that has collected on the sensor, as well as dirt and other residues that are preventing accurate readings. To do this, start by disconnecting the thermocouple from the power and switching the power off.

Make sure to wear appropriate safety gear and clean the thermocouple using a soft cloth or brush. Be sure not to damage the surface of the thermocouple and avoid using any caustic agents, as they could corrode the probe.

You also need to degrease the thermocouple and remove any built-up grease or dirt that may have collected on the probe. For this, use a degreasing agent recommended by the manufacturer. Once you have applied the degreasing agent, wipe the thermocouple gently with a clean, lint-free cloth.

After this, you need to inspect the thermocouple for any signs of damage, such as a broken wire or loose connections. If you find any of these, repair or replace the thermocouple as appropriate.

Finally, you will need to test the thermocouple to ensure accuracy. To do this, calibrate the thermocouple using an appropriate reference source and compare the readings to the expected value. If the values differ significantly, you may need to recalibrate the thermocouple or replace it altogether.

Why does my pilot light keep going out with a new thermocouple?

A thermocouple is a safety device that is designed to cut off the gas supply to your appliance if the pilot light goes out. This is an important safety feature, and should not be disabled or bypassed.

If your pilot light is repeatedly going out after installing a new thermocouple, it could be for a variety of reasons. A common issue is that the thermocouple might not be properly placed. Make sure that the thermocouple is correctly positioned so that it lies just above the pilot flame.

It is also possible that the pilot could be blowing out due to a gas pressure issue. The regulator might not be set correctly, or the gas line may have air trapped in it.

It is also important to ensure that your pilot light is burning correctly – it should be burning with a blue flame. If it is not, that can cause the thermocouple to be too cold and the pilot to extinguish.

You can clean the burner orifice and pilot tubes, and check the gas pressure to ensure the pilot flame is burning hot and blue. If you are unable to do so, consult a qualified gas technician to resolve the problem.

How do I know if my thermocouple is dirty?

If your thermocouple is dirty, you might notice a few signs. If the temperature readings you get from the thermocouple are erratic or inconsistent, this is a good indicator that the thermocouple is dirty.

You may also notice an increase in the amount of heat needed to achieve the desired temperature. If you notice any changes in the response rate of the thermocouple when heating or cooling, this could be caused by a buildup of dirt.

If you suspect that your thermocouple is dirty, the best thing to do is to start with a basic cleaning. You can clean the thermocouple with a soft cloth and a mild cleaning solution. Make sure to avoid any abrasive scrubbing that could damage the surface of the thermocouple.

Additionally, if your thermocouple is located in a space with a lot of debris or dust, consider using a dust cover or enclosure to keep it clean. If the thermocouple does not appear to be cleaning up after several attempts, it may be time to replace it.

How much should a plumber charge to replace a thermocouple?

The cost to replace a thermocouple will vary, depending on several factors, including the type of thermocouple and the complexity of the installation. Some basic thermocouples may only cost a few dollars, while more expensive and specialty thermocouples may cost more.

Additionally, some installations may involve more complex work such as accessing hard-to-reach areas and repairing leaks, which will factor into the cost.

In general, plumbers charge an hourly rate that is based on their experience and the complexity of the job. For a straightforward installation, a plumber may charge an hourly rate of approximately $80 to $100 per hour.

For more complicated scenarios, hourly rates may be higher depending on the difficulty of the job. On average, the cost of replacing a thermocouple can range from approximately $100 to $200, including any additional labor required.

It is advisable to get a few different quotes from local plumbers, so you can compare prices and find an option that best meets your needs.

Where is the thermocouple located?

The thermocouple is typically located within a device or appliance near the heat source. This location is important since it needs to be able to measure temperature accurately. It is often positioned so that it is between the heat source and the area that needs to be heated.

It usually also needs to be as close as possible to the source of the heat. It can usually be found near the pilot light, burners, and combustion chamber in gas fired appliances such as furnaces and water heaters.

Another important location for thermocouples is near the evaporator in a refrigeration system.

Should I worry if the pilot light goes out?

Yes, it is important to monitor the pilot light on a regular basis as it helps to ensure that your gas appliances are working properly. If the pilot light goes out, it could be an indicator of a more serious issue with the appliance.

Possible causes of the pilot light going out may be an issue with the thermocouple (a safety device that senses when the flame is burning and allows gas to flow), improper air flow, or a faulty part.

If the pilot light has gone out, you should contact a qualified technician to come and inspect and repair the appliance as soon as possible. Additionally, it is important to never attempt to light the pilot light yourself as gas can be highly combustible when used without caution.

Can a pilot light get clogged?

Yes, a pilot light can get clogged. Over time, dust, dirt and other debris can accumulate on the pilot light, leading to a decrease in oxygen and an increase in carbon monoxide, which can clog the pilot light.

This can cause the pilot light to become weaker or even stop working altogether. If the pilot light does get clogged, it may require professional cleaning or replacing in order to ensure the proper functioning of your heating or appliance.

In some rare cases, clogged pilots can even lead to dangerous carbon monoxide buildup in your home, so it is important to have issues with pilot lights checked out promptly by a qualified technician.

How do I clean the pilot light on my thermocouple?

Cleaning the pilot light on your thermocouple is a relatively straightforward process. First, turn off the gas supply to your appliance. Then, unscrew the pilot light access panel to get to the thermocouple and pilot.

Take a can of compressed air or a paintbrush and brush away any soot or dirt from the thermocouple and the pilot. After that, turn the pilot cover assembly so that you can access the pilot adjustment screw.

Turn it counter-clockwise to make the flame size larger. You may need to adjust the pilot multiple times until it is burning evenly and strong enough. If the pilot light still won’t stay lit, it may mean that the thermocouple needs to be replaced.

If you find that the thermocouple needs to be replaced, consult a professional technician as working with gas can be dangerous. Once the pilot light is clean and adjusted, replace the pilot access panel securely and turn on the gas supply.

Can you clean a thermocouple with sandpaper?

No, it is not recommended to clean a thermocouple with sandpaper because it can damage the surface of the thermocouple, leading to inaccurate readings. The most recommended way to clean a thermocouple is with a soft cloth, rubbing alcohol, and a toothbrush.

It is important to be sure all rubbing alcohol is removed, then wipe the thermocouple with a dry cloth to prevent rust or damage to the components. It is also important to keep the thermocouple from becoming clogged with debris.

This can be done by wiping off dust and dirt that gets stuck on the surface. Additionally, it is important that the thermocouple is kept in a clean and dry environment.

How often should a thermocouple be cleaned?

A thermocouple should be cleaned regularly to ensure reliable operation and process control. Generally, it is recommended to clean it after every process cycle, or at least every two to four weeks depending on the particular environment.

For example, in an environment with high levels of dust, cleaning should be done more often. Some tips for cleaning are to first brush away any visible dust or dirt and then use a lint-free cloth with a solvent such as isopropyl alcohol to wipe off any remaining residue.

It is important to be careful not to touch the active sensing element of the thermocouple during the cleaning process, as this can damage it. In addition, care should be taken to inspect the thermocouple for any signs of damage or wear after cleaning, such as cracks or scratches, which could adversely affect its performance.

What is the life expectancy of a thermocouple?

A thermocouple’s life expectancy is largely dependent on its conditions of use and maintenance. In general, when used properly and with minimal maintenance, thermocouples can last an average of 1-2 years.

Certain types of thermocouples can last longer. for example, sheathed thermocouples, with a protective outer layer, can last 5-10 years.

The life expectancy of a thermocouple can also be affected by external factors that can lead to its deterioration. In high temperature environments, thermocouples are prone to oxidation and corrosion, which can reduce their life spans significantly.

Additionally, thermocouples that are subject to mechanical shocks should be serviced more frequently, as the vibrations can cause physical wear and tear and reduce their longevity.

To ensure a long life expectancy and ensure that your thermocouple is functioning correctly, it can be helpful to service it regularly and check for any damage, as well as properly installing it to prevent against any physical shocks.

Properly stored thermocouples can also help prolong their life cycles.

What causes a thermocouple to keep going out?

A thermocouple keeps going out when the thermocouple has failed, the type of thermocouple is incompatible with the application, or the thermocouple has become exposed to extreme temperatures that it was not designed to withstand.

Additionally, there are many other potential causes to a thermocouple going out, such as external factors such as moisture or dust, or worn wiring that is not able to properly conduct signal. In most cases, if a thermocouple is going out repeatedly, it signifies the thermocouple has reached the end of its life cycle, and needs to be replaced.

How much does it cost to replace a thermocouple on a furnace?

The cost of replacing a thermocouple on a furnace can vary widely depending on the model, make and age of the furnace as well as the specific type of thermocouple you need. On average, the cost may range anywhere from $20 to over $200, depending on these factors.

Most furnace thermocouples are metal and metal parts tend to be more expensive. To determine the exact cost of replacing a thermocouple on your furnace, it is best to consult with a professional HVAC technician.

They will be able to provide an accurate estimate and will ensure that the right thermocouple is matched to your furnace.