Clean the thermocouple – using the emery cloth sandpaper, sand the ends of the thermocouple and then give it a finishing touch with the lint-free cloth. Hopefully, you can get to the ends of the thermocouple without having to detach it from the assembly, but you may have to do that.
Can you clean a thermocouple on a water heater?
Cleaning the thermocouple
You can use Emery cloth sandpaper to gently clean any debris or build-up from the end of the thermocouple. If present, you should also clean off any corrosion where the power wire connects to the thermocouple terminal.
How do you clean a dirty thermocouple?
The best way to clean your thermocouple is to use either a piece of steel wool or the coarse side of a sponge to gently clean off any soot or other remnants. You can use a pencil eraser to clean between the threads of the screw that connects the thermocouple to the control valve of your system.
How do I know if my thermocouple is bad on my water heater?
If the pilot lights but the flame goes out as soon as you release the button after holding it for 60 seconds, then the thermocouple is bad. It’s possible to replace the thermocouple without removing the burner assembly, and many repair people do this.
How do you clean a propane thermocouple?
The thermocouple in a propane patio heater can easily be cleaned by removing it from the pilot assembly and use a sponge, steel wool or other abrasive material to scrub and dislodge any accumulated debris.
How long does a thermocouple last on a water heater?
In effect, new thermocouples were installed into contaminated tubes, causing the degradation of the sensors and generating greater than a 100°F shift in accuracy. In this scenario, thermocouple life, which should have been close to one year, was shortened to within a week.
Why does the pilot on my water heater keep going out?
The most common reason that your pilot light on your water heater keeps going out is a damaged, bent or dirty thermocouple.
What are the symptoms of a bad thermocouple?
Failed Thermocouple Symptoms
- The first is signs of contamination on the tube, which can include discoloration, cracks, or pinholes.
- Next, check the wiring for any signs of wear or corrosion like missing insulation or bare wire.
What is the life expectancy of a thermocouple?
They can last up to 10 years if properly maintained and installed.
What makes a thermocouple go bad?
Changes in temperature can cause regular expansion and contraction in metal, which will cause thermocouples to weaken over time. After enough time, metal fatigue can cause a thermocouple to break. … If thermocouples start to give out unusual readings, it may be suffering from metal fatigue.
Can you replace a thermocouple yourself?
It’s easy to replace and a new one costs $5 to $10. Rather than trying to unfasten the thermocouple inside the water heater’s burning chamber, it’s easier to remove the whole burner and thermocouple assembly. … Then unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve.
How much does it cost to replace a thermocouple?
The thermocouple is an apparatus that senses whether the pilot light is lit and triggers the gas control valve. Repairs typically cost about $150 to have it done professionally, though a new thermocouple itself only costs about $20 on average.
Why does my propane heater keep going out?
If the thermocouple is too far from the flame, this can cause the pilot to go out and shut down the propane heater; you can fix this easily by moving the thermocouple closer to the flame. The thermocouple could also be worn out, in which case it needs to be replaced.
Do thermocouples need cleaning?
If the Thermocouple is faulty it will cause the unit to shut down. How to clean? Remove Thermocouple from pilot assembly, using steel wool or emery cloth to lightly clean the tip removing any soot or build up that might have accorded due to an improper pilot flame.