This episode called "Red Flag" was shown on 28 Nov. '22. It was the season finale.
The firefighters go to a house that is supposedly haunted after a police officer was injured in the house while investigating repeated calls from the house to the 9-1-1 dispatchers. Paramedic "Chimney" discovers that a phone line has shorted, causing the repeated calls. He pulls out a Leatherman OHT and some tape and quickly fixes the short.