Gas furnace flame wont stay on in the night/early morning (2023 Update)

had this issue for several years and several techs came out but no fixes. Most of time happens during the mid-night and early morning, and works properly in the daytime so the techs could not see any issue. Here is the description: " Normally happens in cold temp (below 30) and mid-night/early morning, working normally most of time during the daytime. The burner cannot stay on and results short cycling, the unit could stop before reaching the set temperature. . Inducer motor turns on ; 2. igniters ignite for approx 5 secs 3. Gas shuts off, 3. Inducer motor continues to run, while flame kicks on/off frequently, and the blower could starts after dozens of trials, and the burner could repeat on/off during the cycle. I took some advice from a professional and vacuumed the drain tubes (which goes to the trap) from the inducer, it worked for 2 months and seems failed again., Occasionally i noticed there is some water traces right underneath the inducer. The unit is located at attic, it is Goodman brand about 14-15 yrs old, had inducer, gas valve replaced last year, and I have cleaned the flame sensor but no improvement. Any comments or suggestions? Thank you

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sfcdmu
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I understand that you're having trouble with your Goodman brand furnace staying on during cold temperatures, specifically in the middle of the night or early in the morning. This is a common issue that can be caused by a few different things. Here are some steps you can take to troubleshoot the problem:

  1. Check the thermostat to ensure it's functioning properly and set at the correct temperature. Make sure the air filter is clean and not clogged. A dirty filter can cause the furnace to shut off.
  2. Check the flame sensor to make sure it's clean and free of debris.
  3. Look for any water traces around the inducer. If there is water, it could indicate a clogged condensate drain line, which needs to be cleaned to prevent the furnace from shutting off.
  4. Check the gas valve and make sure it's functioning properly.

Here is a list of tools and materials you may need:

  • Thermostat batteries (if applicable)
  • Vacuum cleaner
  • Rags or paper towels
  • Screwdriver
  • Multimeter

If the problem persists after attempting these troubleshooting steps, it may be time to call in a professional for a more in-depth diagnosis.

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