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.

Why does my pilot light go out when I turn it to on?

Some of the possible serious reasons for pilot lights to go out include loose or broken gas valves, thermocouples or heat exchangers, faulty venting, low gas pressure, or high winds. If you believe there is a serious problem, don’t hesitate to contact a professional.

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





Dirty Thermocouple



If it’s filthy shut your gas off so that the unit can cool down, then gently clean it by carefully rubbing it with fine grain sandpaper. When you’re done, simply turn the gas back on and light the pilot again. If dirt or grime was the issue, your light shouldn’t go out again!
Mar 16, 2021

Why won’t my pilot light stay lit on my heater?

If your pilot light won’t stay alight, it might be the thermocouple. Sometimes dust buildup collects on the thermocouple and blocks the sensor. Try cleaning the thermocouple and then relighting the pilot light. If it continues to go out, the thermocouple might need to be replaced.
Jan 27, 2020

How do you clean a thermocouple on a gas heater?

In cleaning a thermocouple, you need some steel wool or 60-grit sandpaper, and a cloth. First, turn off the gas supply, unscrew the thermocouple and then clean it with steel wool or sandpaper then wipe down with a cloth to remove residue. I clean our thermocouple every six months to avoid getting it coated with soot.
Aug 6, 2021

How do I know if my thermocouple is broken?

After about a minute, when you’re sure the probe has gotten hot, place one lead on the shaft of the thermocouple and the other lead on the connector. If the reading is less than 25 millivolts, the thermocouple is bad and needs to be replaced.

How do you clean a 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. Be aware, you may need to detach the thermocouple from the burner assembly to clean it thoroughly.
Jun 11, 2020

Why does the flame on my furnace keep going out?

If your furnace keeps shutting off, it could be due to low airflow. There are several indirect issues that cause low airflow. Dirty Air Filters. If you don’t change your air filters often enough, the filters will become dirty and clogged, which means the heat exchanger retains heat and eventually causes it to overheat.

Why does gas heater keep turning off?

Blocked vents



Lack of air can cause the heaters to shut off of their own accord. If there is not a sufficient amount of air provided to the heater, the exchanger in the set won’t be able to give off heat as a transfer. Take a look at your supply vents and ensure that the area is not blocked.
Jun 6, 2021

How often should a thermocouple be replaced?

Thermocouples can last up to 10 years if properly installed and maintained, while furnaces can last 15-20 years, although either may wear out sooner in multifamily units.

Why will my propane heater not stay lit?



When your propane heater’s pilot light doesn’t stay lit, it’s most likely because of a dirty thermocouple, a dirty pilot, and a clogged orifice. The heater will also fail to work, in case it is placed in a windy area – a wind barrier will get the problem solved.
Dec 11, 2021

Where is the thermocouple on a propane heater?


Quote from Youtube video: This is the thermocouple. Okay that's the thermocouple here's a main igniter wire. And here is the tube that gives you propane. So you follow this wire down.

How do I know if I need a new thermocouple?

A working thermocouple will give a reading of between 25 and 30 millimeters. If the reading is less than 25 millimeters, it should be replaced.

Can I replace a thermocouple myself?



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.
Mar 20, 2019

How do you clean a clogged pilot line?

Quote from the video:
Quote from Youtube video: The easiest way to clean a pilot assembly is the only way operating pump once or twice will easily clear the ash from the orifice. Inside the pilot assembly.

How do you clean a propane pilot light?

Use your pliers or wrench to remove the pilot light and thermocouple from the bracket. Using the wire brush, brush away the carbon buildup and soot from both components. For hard to reach areas and stubborn buildup, use the metal file. Wipe away dust with a soft cloth or burst of compressed air.
Nov 25, 2018

How do you clean a propane heater?

Quote from the video:
Quote from Youtube video: Be gentle any soot any carbon that's built up on there. And after i do that i come back with a vacuum. Cleaner all right got it all put back together now you should be good to go.

How do you clean a pilot light sensor?



Quote from the video:
Quote from Youtube video: And all we have to do to clean this is just to take a little piece of Emery paper. And sand it slightly. So if you don't have any of the sand. Cloth.

Why does my pilot light keep going out on my hot water heater?

Thermocouple Issues



If it senses that your water heater pilot light keeps going out, the thermocouple will shift off the gas supply to the heater. Over time, thermocouples can malfunction, accumulate dust buildup, or the device can get bent away from the pilot light’s flame.
May 13, 2021

Can hear your furnace click on but it does not fire up?

You Have a Faulty Ignition Sensor (Pilot Light)



The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. This is typically the problem if you can hear your furnace click on but it does not fire up.
Feb 29, 2020