What the symptom can mean
A change to a vent route can influence air movement, but a coincidental appliance fault is still possible. The actual alteration and drying result should be assessed together.
Describe the alteration
State whether an outlet, duct route, fitted door or surrounding cabinet was changed. Include the date and first programme where the result differed. Confirm that the installed dryer is actually a vented model if known.
Record ordinary observations
Mention a change already noticed at the normal outside outlet if safely visible. Keep the result, warning and timing together without unmounting the appliance or disconnecting the vent for a photograph.