The thermocouple is the copper rod the pilot flame directly hits.
Crown gas furnace pilot light.
If your heat is on but the furnace is only blowing cool air there is a good chance you have a pilot light that is out.
Step 1 open up your gas furnace.
Let your furnace cool down for 30 minutes.
Make sure you have the flame to light the pilot very close to the pilot when trying to light it.
Insert a lit fireplace match or a butane.
Turn off the gas flowing to the furnace using the shutoff valve.
Pressing down on the knob will release gas into the pilot light orifice.
Unlike older pilot lights which have to be lighted by hand automatic pilot lights now commonly found in most home furnaces are regulated by a thermostat and only ignite when needed.
While older pilots burned constantly wasting gas automatic pilot lights come on long enough to ignite the gas supply and then shut off.
The most common reason for this problem is because the pilot light is not on.
Shows you how to check light your pilot light on your gas boiler.
You will be checking the pilot tube and thermocouple to find out what may be the issue first turn off the pilot light on your furnace.
A gas furnace s standing pilot in which the flame is lit at all times is sometimes referred to as a pilot light but no matter what you call it its purpose is to serve as a small ignition flame for the gas burner.
If the thermocouple fails to shut off the gas all the gas flowing through the furnace could get into your home.
The burner in your gas furnace is ignited either by an electronic ignition as is found in most modern furnaces or with a standing pilot flame which is common in older style furnaces that have an afue annual fuel utilization efficiency rating of less than 80 percent.
Turn the gas control knob to the pilot position then press down on the knob.
Sometimes it s referred to as the flame sensor it s a safety mechanism that shuts the gas off should the pilot go out.
The image below shows what the pilot will look like.
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How to light a pilot light on a furnace.
When your furnace fails to ignite the first place to look is the pilot light.
