Forum Discussion

Family-of-five's avatar
Oct 05, 2020

dometic furnace problem

Hello friends We got to take out our new rig this past weekend for some fall camping. Its a highland ridge lite bunkhouse. The furnace will light and run for a few seconds then shut off. Then it will relight and run for a few seconds and shut off this just keeps on repeating. I know its under warrantee but both the dealers are over an hour and a half drive each way. I was wondering if I can fix it myself or possible my local furnace man?
  • Sounds like the 'flame proving' signal is not returning to circuit board
    Spark Electrode provides high voltage spark to ignite the gas and is then used a pathway for 'flame' signal (flame rectification) to circuit board
    W/O that signal circuit board shuts down DC to gas valve so raw fuel does not accumulate

    Could be as simple as spark gap (too wide/too narrow the milliamp signal gets lost)
    Could be circuit board issue
    Could be spark electrode wire or wire connection
    Could be loose wire connector on circuit board

    What Brand/Model is the Furnace???