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1- Defective gas controller2- Thermostat/ aqua stat not calling for heat3- electric shut off

Tripped or defective safety device, gas valve set on pilot, bad transformer. Don`t kill yourself looking for the aquastat. That is a boiler control and your furnace does not have one.

Electic good-- whatelse can I test?

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Q: Why will the gas furnace burner not light up even though the pilot light is on?
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How will you know your pilot in the furnace is on?

You sould be able to see it either in the open or through a sight glass. If you have a continious pilot you just look at the burner where the furnace is open. Higher efficiency furnaces have an intermitent pilot that is only light when it is needed to light the main burner. And some do not have pilots at all and an ignightor lights the burner directly.


How do you light the pilot on an octopus furnace?

How do I light pilot light on furnace


What is pilot gas in a furnace?

Pilot gas is the very small flow/burner used to maintain an ignition flame in a gas appliance. Sometimes called a pilot light, or pilot flame, it's used to ignite the main burner.


Would a pilot light on a gas furnace still work with a defective thermocouple?

Pilot light would work but the main burner would not as the thermocouple proves that there is a pilot light to fire. The main gas valve would not open


Why won't the gas burner not light on the boiler even though the pilot light is on?

my boiler wont ignite


Where is the furnace pilot located?

The gas furnace pilot (flame is lit all the time) 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. And when this little flame fails to operate properly or go out, it's one of the most common reasons a gas furnace will fail to operate.


When the pilot light comes on when the burner comes on there is a boom?

Think it is just that the pilot light is lighting the main burner, which makes a booming sound.


Where is the thermocople located on the furnace?

At pilot light, pilot light flows around thermocouple.


Burner in a boiler system?

Pilot light


Does the Trane XE70 furnace have a pilot light?

No standing pilot, it is a spark ignition unit


Why does the pilot light in your furnace go out?

Defective thermocouple or possibly a dirty or clogged pilot orifice.


What causes the pilot light to keep burning out in a furnace?

If this is happening you need to get your furnace serviced by a qualified engineer.