Universal Gas Thermocouple - 900mm - Under Control Instruments
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OnBuy.comUniversal Gas Thermocouple  900Mm 5061032253159
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Product Information
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The Under Control Instruments 900mm Universal Gas Thermocouple is an essential safety component for homeowners, professional technicians, and DIY enthusiasts looking to maintain gas appliance reliability. Its primary benefit is providing robust flame failure protection, ensuring that the gas supply automatically terminates if a pilot flame goes out, though users should note that the 900mm length must be compatible with the specific internal dimensions and routing path of their appliance.
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| Brand | Under Control Instruments |
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Extended Product Information
FAQs
Can I shorten this 900mm thermocouple?
No, you should never cut or attempt to shorten a thermocouple, as this will damage the internal conductive material and lead to total failure.
How do I know if my thermocouple is faulty?
A faulty thermocouple typically fails to keep the pilot lit after you release the control knob, even if the pilot light appears healthy.
Does this work with all gas appliances?
It is designed as a universal part for standard gas valves, but always check your appliance manual to ensure it utilizes a standard thermocouple-actuated solenoid.
Is any special tool required for installation?
Generally, only a small adjustable wrench or pliers are needed to tighten the nut at the valve connection.
Should I use thread sealant on the thermocouple fitting?
No, do not use thread sealant or tape on the thermocouple connection, as it relies on a clean metal-to-metal contact to conduct the electrical signal.
Troubleshooting
Pilot flame will not stay lit
Verify that the thermocouple tip is fully immersed in the pilot flame and the connection at the safety valve is secure.
Intermittent gas shut-off
Clean the probe tip of carbon soot and ensure no debris is obstructing the pilot burner assembly.
Pros and Cons
Pros
- Ensures reliable safety shut-off functionality
- Universal fit reduces the need for brand-specific parts
- Generous 900mm length accommodates diverse installations
- Easy installation with included connectors
Cons
- Requires precise routing to avoid sharp bends
- Not compatible with specialized proprietary valve systems
- Length may be excessive for smaller compact appliances
Setup, Compatibility & Care
Installation should be performed while the gas supply is shut off. Begin by removing the existing faulty thermocouple and ensuring the new 900mm lead is routed away from extreme heat sources or sharp metal edges that could wear through the insulation. Tighten the connection to the gas valve by hand until snug, then give an additional quarter-turn with a wrench; avoid over-tightening as this can strip the delicate threads. For maintenance, periodically wipe the probe tip with a clean, dry cloth to remove carbon buildup, which can insulate the sensor and cause intermittent flame failure.