If your furnace keeps shutting off, it could be due to low airflow. There are several indirect issues that cause low airflow. Dirty Air Filters. If you don't change your air filters often enough, the filters will become dirty and clogged, which means the heat exchanger retains heat and eventually causes it to overheat.
How do I know if my thermocouple is bad?
If you can't get the flame to light at all, and you're sure the gas is on, there's probably an obstruction in the pilot tube. If the flame lights and goes out when you release the gas control knob after holding it in for the recommended 20 to 30 seconds, that's the sign of a thermocouple malfunction.Dec 15, 2021
Can you just clean a thermocouple?
Yes, you can clean a thermocouple, but the task must be done with a light touch. Remove the thermocouple from the process assembly, using a steel wool or emery cloth, lightly clean the tip removing any build up.Sep 7, 2021
How do you keep a gas heater lit?
https://www.youtube.com/watch?v=PiCmfW1rTRY
How do you fix a bad thermocouple?
https://www.youtube.com/watch?v=3EKbSiAJyiI
What happens when a thermocouple goes out?
The job of the thermocouple is to keep the pilot lit. It does this by sending a tiny electric current to a sensor on the gas valve signaling the valve to stay open. ... Nothing lasts forever, and when the thermocouple wears out, the pilot won't stay lit and your appliance won't work.Dec 15, 2021