Do all gas fireplaces have a thermocouple?

Most gas fireplaces have a start-up mode to allow heating of the thermocouple. All gas fireplaces have a safety pilot system that includes the thermocouple and a combination valve.

Also, where is the thermocouple located on a gas fireplace?

The thermocouple is a gas furnace component located near the pilot light burner. It is a safety device that shuts off the gas if the pilot light goes out or the electric igniter fails.

Likewise, why is my gas fireplace not lighting? Pilot light systems are the most common reason gas fireplaces fail to light, so check the main gas valve to make sure the gas is turned on. It should usually run parallel to the gas line when it is on. The pilot lights, but not staying lit, indicates that the thermocouple is worn out or bad.

One may also ask, what does a thermocouple look like on a gas fireplace?

The thermocouple on your gas fireplace is a heat-sensitive device that keeps the pilot gas tube open while the pilot is lit. The thermopile is a related device that you should test at the same time -- its function is to open the gas to the burners.

What's the difference between a thermocouple and a thermopile?

The main difference between Thermocouple and Thermopile is that the Thermocouple is a thermoelectric device and Thermopile is a device that converts thermal energy into electrical energy.

How do you know if you have a bad thermocouple?

If you can't get the flame to light at all, and you're sure the gas is on, there's probably an obstruction in the pilot tube. If the flame lights and goes out when you release the gas control knob after holding it in for the recommended 20 to 30 seconds, that's the sign of a thermocouple malfunction.

Can a thermocouple be cleaned?

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.

How long does a thermocouple last?

Thermocouples can last several years, but they don't typically last as long as the furnace itself. If the pilot remains lit, but the main furnace doesn't stay lit, it's time to replace the thermocouple. Replacement thermocouples are in stock at most hardware and home improvement stores.

Are thermocouples universal?

Universal Thermocouples. Universal thermocouples, as the name implies work on most water heaters. They are available online and in home supply stores for a reasonable cost. The length and the thread type are the two concerns when purchasing one.

Can you test a thermocouple?

Select the ohms or resistance option on your multimeter. Place one test lead on the side of the thermocouple and the other to the end that screws into the gas valve. If the thermocouple has proper continuity, a small resistance reading should be visible on the multimeter.

How do thermocouples fail?

Thermocouple failure is a common problem with residential gas water heaters. This small amount of electric current keeps the pilot gas valve open. If the pilot light goes out, the electrical current stops and the gas valve closes. Simply put; no flame, no gas flow.

What does a thermocouple look like?

The thermocouple looks like a piece of metal tubing smaller than a soda straw. To find it, first locate the gas control box. This is the box that the main gas line enters, where you turn the gas on in the furnace. The other end of the thermocouple sits in the flame of the pilot light.

How do you fix a thermocouple?

Replacing a Thermocouple

1. Shut off the gas and electrical power to the furnace.
2. Remove the furnace's access cover.
3. If the furnace has been running, wait 30 minutes for the thermocouple to cool completely.
4. Unscrew the nut that holds the thermocouple end fitting into the gas control valve, using an open-end wrench.

Why does gas fire cut out?

If you get dust in the pilot assembly and the pilot needs to be cleaned out, it produces a "lazy" flame, which will be disturbed by the draught of the main burners. The flame lifts away from the thermocouple and causes the temperature on the tip of the thermocouple to drop. This, in turn, makes the gas valve shut off.

How close should the thermocouple be to the pilot light?

about 1/2 inch

How do you replace a thermocouple on a gas fireplace?

The only tool you need to replace a thermocouple is a wrench. Use it to unscrew the connector that holds the thermocouple to the gas valve, then unhook the probe from its clip and pull out the entire thermocouple assembly. Before you do this, be sure to turn off the line valve on the gas supply.

Should I keep pilot light on gas fireplace?

Leaving the gas on keeps this compound moving out of the tubes. Keeping the pilot light on will also keep moisture out of the unit and in turn, help prevent corrosion. As you can see, it's probably best in most cases to extinguish the pilot light in your gas fireplace during the months when you don't need heat.

Can a thermocouple work intermittently?

a safety device that has started to go bad, or has failed permanently. In this client's case, the thermocouple was initially working intermittently, and then finally failed. This allowed the gas to flow long enough to heat up the thermocouple and generate some electrical current flowing back to the gas valve.

Does gas leak if pilot light goes out?

When the pilot light goes out, it does not leak carbon monoxide gas. However, if the light goes out frequently there could be other issues.

How do you fix a gas fireplace that won't light?

To do this, hold the pilot button down for about one to three minutes while the air bleeds out. Step 3. If gas is coming out of the pilot, but it still won't light, the spark igniter could be the problem. Alleyne says to look for and clear out any debris between the igniter and thermocouple.

How often should gas fireplaces be serviced?

The initial and foremost guideline of any gas fireplace system is to have it inspected every year. With professional chimney companies, you can usually have your annual chimney cleaning and gas inspection scheduled at the same time. Matter of fact, your whole system should be inspected annually, top to bottom.

Can you start a gas fireplace without electricity?

Modern gas fireplaces more than likely have an intermittent pilot ignition system. The IntelliFire and IntelliFire Plus use batteries to pilot your gas fireplace during a power outage. If you have a standing pilot, the gas fireplace will light itself without the need for electricity.