While this is an excellent safety feature a faulty thermocouple may decide arbitrarily that your pilot light is off when you want it on shutting down your pilot light and your furnace.
Gas wall heater pilot light won t stay lit.
While not as common as thermocouple issues it s an easy fix and should thus be rules out early on.
On occasion the tube can become kinked interrupting the flow of gas.
Gas heater pilot light troubleshooting.
Gas heaters whether they warm up air or water in a home rely on a pilot light to trigger the flame of the actual heater.
When i hold in the pilot button to light it it does light but when you release it the flame goes out.
If it determines that the pilot light is off it shuts down the flow of gas.
I replaced the thermocoupler and the gas valve with a new valve itt general controls b67ra56 and nothing different it still won t stay lit.
This is one of the most common reasons the burner won t stay lit even when the pilot seems to be in working order.
I have a gas wall heater and the pilot won t stay lit.
If this pilot light ever goes out.