On this micro podcast I go through some recent troubleshooting on a Lennox Packaged Rooftop Unit. The main control board on the unit originally would not create a spark in heating mode to light the burner. I replaced the board....Listen to find out what happened next. Housecall Pro first month for $19.00 https://www.housecallpro.com/hvacknowitall Testo 300 https://www.testo.com/en-US/products/testo300 Danfoss

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