I pulled my dryer out yesterday to clean the vent and tubing. When I moved the dryer I noticed what looked like a huge wet stain around the vent connection that leads to my attic. There appears to be a water stain about 2 ft above that as well. Directly above the vent connection in the wall, the wall is soft and wet.
We tried turning off the water meter for 3 hours and there was no change to the meter, which indicates no leak. I left a fan blowing on the wall for about 18 hours now and the stain is less visible and all drywall is dry to the touch today. Which makes me think maybe it isn’t a leak? But, my laundry room backs up to a bathroom so I’m concerned.
It’s $350 for someone to confirm I have a leak so I'd rather not pay if someone can help identify the issue.