MENSI Propane Natural Gas Thermocouple Replacement for Mr Bubby Heater Pilot Burner F273401 73404 Pilot Assembly Used on Heater MH9B MH9BX MH18B, Compatible for Dewalt Small Propane Heater, 2PCS

The thermocouple is a repair parts of the heater Fits Heater: MH9B(2001-2008), MH9BX (2009-current),Heat Star and Enerco MH18B Buddy Heaters, so you can save cost no need replace whole pilot burner if your heater not open the gas . It is installed on the part 78422 ,F278527, F273401, 73404.Pilot assembly fits for Mr.Heater, Heat Star and Enerco MH9B & MH9BX MH18B Buddy Heaters. Compatible whit Dewalt Small Propane Heater. When you need to replace thermocouple and how to test 1) Firstly, check if the thermocouple is full heated by the pilot flame. it need to be well heated then can creat voltage to open the gas valve. 2) if your pilot not work like gas magnet cannot hold , then it may need replace thermocouple 3) Replace the thermocouple on pilot bracket and then hold the gas valve for seconds, to see it can stick on. 4) If not stick on, you have to check if you have right gas type ( natural /lp) of the pilot, if you use wrong gas type the thermocouple may not get singal to open valve.

• Wide Compatibility for Target Models：This thermocouple is specifically engineered to fit thePropane Natural Gas Thermocouple Replacement for Mr Bubby Heater Pilot Burner F273401 73404 Pilot Assembly —a perfect replacement part that ensures seamless integration without extra modifications, saving you time on installation and compatibility checks.Used on Heater MH9B MH9BX MH18B ,Compatible for Dewalt Small Propane Heater
• Ultra-Fast Valve Response Time：Designed to match the target product’s high-efficiency standard, it enables valve opening in less than 5 seconds and valve closing in 15 seconds—effectively minimizing gas leakage risks and maximizing operational safety during startup and shutdown.
• Reinforced Thickened Head Material：The probe head features a thickened, wear-resistant design that enhances impact resistance and extends service life. Unlike ordinary thin-head thermocouples, it withstands frequent temperature fluctuations and accidental collisions, ensuring long-term reliable performance.
• 200°C High-Temperature Resistant Copper Wire：Equipped with premium copper wires that tolerate temperatures up to 200°C, this thermocouple maintains stable signal transmission even in high-heat environments. It avoids wire aging or melting caused by extreme temperatures, guaranteeing consistent safety protection.
• Essential Safety Flame Failure Protection：As a core safety component, it acts as a "flame failure device"—immediately cutting off the gas supply if the flame is accidentally extinguished. This critical function prevents dangerous gas buildup, making it a must-have replacement part for maintaining the target product’s safety compliance.
• 2 PCS in the package.