How to Bypass a Thermocouple on a Propane Heater

To bypass a thermocouple on a propane heater, disconnect it from the gas valve and remove it from the heater. Then, connect the gas line directly to the burner to ignite the propane.

When using a propane heater, you may encounter a malfunctioning thermocouple that prevents the heater from working. In this situation, bypassing the thermocouple can be a temporary solution. However, it is important to note that bypassing the thermocouple can be dangerous and should only be done as a last resort.

In this article, we will explain the steps to bypassing the thermocouple on a propane heater, while also highlighting the importance of proper maintenance and safety precautions when using propane heaters.



Thermocouples And Their Functionality

Thermocouples play a crucial role in propane heaters as they ensure the safety of the device. A thermocouple is a temperature sensor that detects the pilot flame and closes the gas valve if it is too low or goes out.

If the thermocouple isn’t working, there’s a risk of gas leakage, which can lead to burns, explosions and other hazards. For this reason, it’s essential to have a functioning thermocouple and understand how it works. The thermocouple generates a small electrical signal that travels to the gas valve, signaling it to remain open when the pilot flame is burning.

By bypassing the thermocouple, the heater can continue to operate without detecting when the pilot light goes out, making it extremely dangerous.

Troubleshooting Thermocouples

A propane heater’s thermocouple serves as a safety mechanism that prevents gas leaks. It’s essential to diagnose malfunctioning thermocouples. If your propane heater’s pilot light won’t stay lit, then it’s possible that your thermocouple needs troubleshooting.

Additionally, if your propane heater’s burnt orange flame is tainting surrounding surfaces black or smoking excessively, it’s indicative of a faulty thermocouple.

Common propane heater thermocouple issues include corrosion or damage, and a buildup of soot or debris. Steps to diagnose a malfunctioning thermocouple include inspecting for worn or damaged thermocouples, cleaning the thermocouple, and tightening loose connections.

roubleshooting thermocouples is critical for keeping your propane heater running efficiently and safely.

Bypassing Thermocouples On Propane Heaters

Bypassing the thermocouple on a propane heater is a task that should only be done as a last resort and with great caution. When should you consider bypassing the thermocouple? If the thermocouple is malfunctioning and preventing the heater from working properly.

Before attempting to bypass the thermocouple, it is important to take necessary precautions, such as turning off the gas supply and unplugging the heater. It is also important to have a step-by-step guide to follow in order to bypass the thermocouple safely.

When bypassing the thermocouple, it is important to keep in mind that this is not a permanent solution and a new thermocouple should be installed as soon as possible. Always put safety first and proceed with caution when bypassing the thermocouple on a propane heater.

Alternative Solutions To Bypassing The Thermocouple

Bypassing a thermocouple on a propane heater by other means is a widely used practice. However, one should be aware of the risks and benefits involved. Alternative solutions include cleaning or replacing the thermocouple, adjusting the pilot light, and repairing the power supply.

Bypassing the thermocouple can be done using a jumper wire or removing the sensor completely. While bypassing can be a quick fix, it can also pose a safety hazard as it eliminates the safety feature meant to prevent gas leaks and propane poisoning.

Choosing an alternative solution may take more time and effort, but it is safer and can also extend the life of the heater. Ultimately, the best option depends on individual preferences and circumstances.


Bypassing a thermocouple is a task that requires caution and attention to detail. Above all, it is important to prioritize your safety as you go about it. We’ve outlined the steps you can take to get your propane heater working without its thermocouple, but we must emphasize that this is a temporary solution.

You should never run your propane heater for an extended period of time without a thermocouple as this poses a serious threat to your safety and that of those around you. Always prioritize regular maintenance and safety checks to ensure your propane heater is in good working condition.

We hope this post has been helpful in guiding you through the process of bypassing a thermocouple on your propane heater.