A few things to do here. 1. Make sure the thermocouple probe is positioned directly inside the pilot flame. 2. Disconnect the thermocouple from the gas valve and clean the blunt end of the thermocouple AND the area in the gas valve that the thermocouple blunt end mates to. Any dirt, debris or corrosion in this area will cause the symptom that you describe 3. Worst case if you do not have a blue pilot flame you may have to remove the pilot orifice and clear the pin hole in the orifice. 4. If you have a push and hold type pilot lite gas button... press hard... and let go several times. 5. After all of the above the symptom is still present.... you will have to replace the thermocouple. I read that you already did the burner tube cleaning.
Most of the time this symptom is caused by the thermocouple either being in the wrong position, a defective thermocouple or a dirty connection surface area where it mates to the gas valve.
Answers & Comments
Hi and welcome to FixYa. I am Kelly
A few things to do here.
1. Make sure the thermocouple probe is positioned directly inside the pilot flame.
2. Disconnect the thermocouple from the gas valve and clean the blunt end of the thermocouple AND the area in the gas valve that the thermocouple blunt end mates to. Any dirt, debris or corrosion in this area will cause the symptom that you describe
3. Worst case if you do not have a blue pilot flame you may have to remove the pilot orifice and clear the pin hole in the orifice.
4. If you have a push and hold type pilot lite gas button... press hard... and let go several times.
5. After all of the above the symptom is still present.... you will have to replace the thermocouple.
I read that you already did the burner tube cleaning.
Most of the time this symptom is caused by the thermocouple either being in the wrong position, a defective thermocouple or a dirty connection surface area where it mates to the gas valve.
Thanks for choosing FixYa,
Kelly