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
Sometimes it can take up to TWO MINUTES for the thermocouple to take effect ( proof of flame) If the flame does not stay on the thermocouple should be replaced by a qualified licensed plumber
No. The pilot valve is closed when no flame is sensed by the thermocouple.
Spillage excessive condensate bad thermocouple draft
When pilot light goes out, gas flows out of the pilot light nozzle. If out has continued for a long time, a gas cloud can develop around the furnace. When you go to light the pilot light, you'll ignite this gas cloud and make a big fire ball. If your basement is drafty, you might never get a huge cloud of gas hovering around your furnace. When you notice that your pilot light is out, you should shut off the gas to the furnace and allow any stray gas to dissipate before you turn the gas back on and light the pilot light. alliedallcityinc.com
Most pilot lights are not adjustable. If it's not working properly the usual solution is to change the thermocouple.
Defective thermocouple or possibly a dirty or clogged pilot orifice.
At pilot light, pilot light flows around thermocouple.
Not usually. Probably a bad or dirty thermocouple.
modern heaters have a thermocouple that would shut off gas supply if the pilot goes out.
THERMOCOUPLE or defective gas valve
The thermocouple keeps a gas pilot light burning.
Brake light switch stuck, defective, or out of adjustment.Brake light switch stuck, defective, or out of adjustment.
Could be lots of things. If you have a standing pilot light, one that stays on all the time, the thermocouple may be bad. A thermocouple is a small rod that sits in the flame of the pilot light. It then runs to the gas valve. This produces a small amount of electricity that keeps the valve open to let the gas in. If the pilot light goes out it shuts the valve so the house doesn't blow up. Easy enough to replace. If the pilot light is still on and the furnace will not light, it has to be the thermocouple. Check fuses at the furnace and in the panel. Newer gas furnaces have a circuit board in them that can go bad. There are a dozen things that could keep it from working, it is just a process of elination.
1- Defective gas controller2- Thermostat/ aqua stat not calling for heat3- electric shut offTripped 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?
If it is gas, the most common problem is the thermocouple. This is what keep the gas valve open. It is a small silver looking wire, 1/8 of an inch diameter that runs from the gas valve to the pilot light. The pilot flame should touch the end of the thermocouple. Of course it can be a lot of things. Power, there can be a fuse at the furnace that may have blown. There will be a box with a light switch and a screw in fuse. The switch may have been thrown.
How do I light pilot light on furnace
The pilot flame has to encompass the top half inch of the thermocouple. A dirty pilot will sometimes point the flame away and therefore not heat the thermocouple enough to hold. Take a small rubber hose about two feet long and point it at the pilot orface and blow through the hose to remove the ash on the pilot surface Now relight and try it out.