Came out here because the unit was short cycling came in jumper the unit to see what was going on inducer came on as well as HSI when the flames came present, they would last no longer than 2 to 3 seconds, and then shut off so my first thing was to clean the actual flame sensor when taken out the flame sensor. I did see that it was extremely dirty clean the flame sensor off put it back into the unit and cycled it on unit work perfectly fine cycled unit 4-5times with no issues. Thank you for choosing LBA.