What are the symptoms of a bad 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.

How much does it cost to replace a thermocouple on a furnace?

Cost to Replace a Thermocouple on a Furnace Replacing a thermocouple costs $150 to $250, mostly due to labor time. On older models without an ignitor, it checks to make sure your pilot light is lit. If it’s not, it’ll shut the gas off.

How much should a plumber charge to replace a thermocouple?

Calling a professional plumber to install a new thermocouple should only be up to $150. If you do the work yourself, you will only pay the price of the part which is about $20. The thermocouple is responsible for sensing that the pilot light is lit and triggering the gas control valve to continue providing gas.

Why would pilot go out on furnace?

It is positioned very close to the flame, and when lit, the pilot light tells the thermocouple to keep the gas line open. A thermocouple that is dirty or malfunctioning will often shut off your gas supply in error, causing the pilot light to go out and your furnace to stop working.

Does a furnace pilot light always stay on?

If your furnace has a round knob on the gas valve with the words OFF/ON/PILOT, you have what’s known as a standing pilot ignition. Since the pilot light needs to remain active, your furnace is always consuming some gas. It’s not a lot—usually just a few therms of gas a month—but that obviously adds up over time.

What do you do when the pilot light goes out on your fireplace?

How to Relight a Pilot Light

1. Turn off your appliance at the power switch or thermostat.
2. Find the gas valve control knob and turn it to select “pilot.”
3. If pilot light controls are sticky, do not apply force or use oil.
4. Press the red button while simultaneously holding a match to the pilot burner.

Can a pilot light cause a fire?

When the appliance is turned on, a valve releases more gas, which is ignited by the pilot light. If this leak continues, its concentration may reach a point where a spark – such as that from a cigarette lighter, static electricity, or even the pilot light itself as it is re-lit – will cause a fire or even an explosion.

Is unlit pilot light dangerous?

Potential Explosions. Even if the amount of gas leaking from the unlit pilot light isn’t enough to make you sick, it could cause an explosion if some other form of heat energy is introduced. Nationwide Insurance cites extinguished pilot lights as one of the top fire hazards in your home.

Is relighting a pilot light dangerous?

While it is not typically dangerous for the pilot light to go out, you will need to relight it if you want hot water. Although an unlit pilot light is usually not dangerous, if you notice a rotten egg smell in the room where your water heater is located, you need to turn off the gas and call the gas company.

How long does it take to air out a house with carbon monoxide?

This means that if you are breathing fresh, carbon monoxide-free air, it will take five hours to get half the carbon monoxide out of your system. Then it will take another five hours to cut that level in half, and so on. It is best to consult a medical professional if you feel the symptoms of carbon monoxide poisoning.

How do you know if your carbon monoxide levels are low?

While home CO detectors are great for one-time, high-level CO leaks, most are not designed to detect low-levels. Low-levels result in slow, progressive symptoms. The only way to detect low-levels is to have your home appliances and cars tested.