No, you should replace the valve.
To replace the thermocouple in your furnace, first turn off the gas supply and power to the furnace. Locate the thermocouple near the pilot light and unscrew it from the gas valve. Install the new thermocouple by screwing it into place and reassemble any parts that were removed. Finally, turn the gas supply and power back on and test the furnace to ensure it is working properly.
A valve that brings atmospheric air into the furnace exhaust to help expel the exhaust gases.
an electric furnace runs off of 208/230 Volts while a typical gas furnace runs off of 120 also a gas furnace will have a valve for the gas relay where the gas enters the furnace.
Bad thermo,replace. The thermo senses that the pilot is lit and opens gas valve,also could be bad or blocked gas valve.
To change a thermocouple on a furnace, first turn off the gas supply and allow the furnace to cool down. Locate the thermocouple near the pilot light and unscrew it from the gas valve. Replace it with a new thermocouple, making sure it is securely attached. Finally, relight the pilot light and turn the gas supply back on.
the without change part is the most difficult part of the answer. Change the valve. Mine was less than $100. You have a runaway gas valve-the other contributor is right-replace the gas valve asap.
how do you replace the expansion valve
It is normal to replace them.It is normal to replace them.
That's less than half the btu's required what do you think!
How do you replace evpansion valve on 99 gs 300
Nothing as a furnace is scorhed air a BOILER is either water or steam and "Relief Valves" are for liquid thus either you have a boiler or your furnace is being flooded from an outside source