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.
At pilot light, pilot light flows around thermocouple.
How do I light pilot light on furnace
It could be different for every house.A side note: I'm taking that you mean where is the pilot light located in side your furnace? Depending on the of your furnace it's very possible your furnace does not have a pilot light, in fact it may have an ignition system with a flame management sensor. Try this; turn off the system with the main electrical cutoff switch, wait for about 2 minuets, turn on the switch raise the temperature of the thermostat high enough for the furnace to come on, this should work if it does not try one more time. If that fails call a HVAC & R technician.
No standing pilot, it is a spark ignition unit
Defective thermocouple or possibly a dirty or clogged pilot orifice.
If this is happening you need to get your furnace serviced by a qualified engineer.
i have a model 125u19 payne furnace i move the thermostat but nothing comes on in the furnace and the pilot light is lit
Remove the pilot assembly from the furnace and clean it up. You need to be careful when putting it back on at the gas valve so as not to crossthread the screw. Take a thin wire and clean the pilot orifice, then use a brush or sandpaper on the thermocouple.
so when the pilot goes out the gas valve is shut off
No, but your furnace still does
Yes, a bad millivolt thermopile can cause the pilot light in a floor furnace to go out or not stay lit. The thermopile generates the voltage needed to keep the gas valve open and maintain the pilot light, so if it is faulty, the pilot light may not stay lit consistently.
No it will not