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Furnace troubleshooting questions with answers index

Below we have quick links to pages where problems and solutions are discussed for your quick reference and hopefully a quick solution to your problem. Special thanks are in order for the many people who took the time to make the YouTube videos that are included on our pages! I know that it is much easier for me to learn if I can see the problem and repair through a video or picture! Near the bottom of each page there is an area that allows you to comment or ask questions. If you have any questions please send us an email anytime: or comment on the perspective page. We would love to help you out and answer your questions! Hope you have a blessed day! Steve & Barbara Arnold

One of my favorite quotes by David Jeremiah: “Nothing is more valuable than helping another person succeed!”

  1. Problem: Will the pressure switch correct my water drainage problem? (With two YouTube Videos)
  2. Problem: Why does my furnace rollout switch have to be reset so often? Why do rollouts have different temperature differences? (With two YouTube Videos)
  3. Problem: Why does my furnace air conditioner have poor air flow? (With one YouTube Video)
  4. Problem: How do I test and troubleshoot my gas furnace pressure switch? (With one YouTube Video)
  5. Problem: What is the sequence of operation of my 80% gas furnace? (With one YouTube Video)
  6. Problem: Furnace will not ignite. Ignitor will not glow. (With two YouTube Videos)
  7. Problem: Furnace or water heater pilot will not stay lit. (With one YouTube Video)
  8. Gas & Electric Furnace Troubleshooting Simplified (With one YouTube Video)
  9. Furnace Troubleshooting Flow Chart.
  10. Problem: Furnace comes on, doesn’t run long then shuts off. Will work if thermostat is turned way up. (With one YouTube Video)
  11. Furnace Hot Surface Ignitor Troubleshooting Videos.
  12. Problem: How do I wire up my new thermostat? What do the wire colors mean? (With two YouTube Videos)
  13. Thermostat Replacement (Video)
  14. Furnace Control Board (Video)
  15. Furnace Blower Replacement (Video)
  16. Problem: Furnace main burner ignites, the main burner stays on for 8 to 10 seconds, then shuts right back off (With one YouTube Video)
  17. Problem: I purchased a flame sensor from you for my Goodman furnace. The new flame sensor did not fix the problem? (With two YouTube Videos)
  18. Problem: Blower shuts off too soon, cycles off and comes back on within 30 seconds
  19. Problem: The fan on your furnace runs all the time and will not shut off (With one YouTube Video)
  20. Problem: Fan will not come on in the “ON” position or your fan will not come on when you turn the thermostat down
  21. Problem: Furnace, air conditioner heat pump will not come on. Blown fuse on board. (With one YouTube Video)
  22. Problem: Draft inducer will not start, ignitor will not glow or gas valve will not open.
  23. Problem: Electric heat will not come on, fan will not come on.
  24. Problem: Why do I have to replace my furnace ignitor every two weeks?
  25. Problem: My Trane IGN00145 Ignitor is going out too often? What could be the problem?

2 Responses to Furnace troubleshooting questions with answers index

  1. Mike December 31, 2015 at 12:30 pm #

    I have a Carrier 1986 Model 58GS100-150CA furnace. Lately the main burner ignites and then immediately shuts off then re-ignites several cycles. Finally it will remain on and run normally. I cannot locate a flame sensor on this unit. I do not believe it has one. So what else could cause this problem?

    • Steve Arnold December 31, 2015 at 12:49 pm #

      Hi Mike! This could be something as simple as a dirty 3-wire pilot burner. I would suggest that you try to clean the 3- wire pilot burner out with compressed air. Our Carrier parts program shows that your furnace uses the LH680005 three wire pilot burner that we sell on the following page: Here is a screen shot picture that shows some of the parts for your furnace in the burner section: I hope that cleaning the pilot burner fixes your problem. If not you might need a new pilot burner. I would also recommend that you check are wire connections and grounds to make sure they are good and tight. Steve

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