so when the pilot goes out the gas valve is shut off
How do I light pilot light on furnace
The gas valve is an electrically powered device that is wired at the end of a series circuit so that it can only be energized (open) if all of the safety switches upstream in the circuit are closed and the pilot flame is lit on a standing pilot furnace.
There are a couple common reasons for a pilot light going out. 1. The thermocouple is weak. This is the gold rod that must see the flame in order to keep the gas valve open. it is a safety device that will not let the gas vavle open if there is no pilot. 2. The pilot is dirty and has a yellow flame. If this is the case, it will have to be cleaned. There are books on he market such as forced hot air furnace - troubleshooting and repair that show you how to repair your furnace. You can buy this at amazon.com
At pilot light, pilot light flows around thermocouple.
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.
It's not necessary to clean it. If by any chance you have a problem and THINK you need to clean it, it's more likely the thermocouple is acting up and needs to be replaced.
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.
No, but your furnace still does
None!