Regardless of the specific problem vibration is definitely a problem that you ll want to address since the movement can cause damage to surrounding walls and floors as well as the dryer itself.
Dryer vibration on floor.
If a stackable washer dryer unit is vibrating it may not be level.
A damaged idler pulley idler pulley bracket or idler pulley tension spring could.
I haven t tried this yet.
Preventing a stackable washer and dryer from vibrating is an easy task that you can troubleshoot and tackle yourself.
This will only work of course if your washer sits close enough to the wall on one side and the dryer on the other.
If the contents of the drum check out okay then a bad drum support roller could be causing a thumping noise.
Noise from the dryer often means that a hard object is clanging around inside the drum the zipper on a sweatshirt change left in a pocket your phone.
My again non physics expert mind s theory is that this spreads the vibration load out to more planes points of contact.
If it s not possible to add bracing as described you can place a 5 8 or 1 inch sheet of plywood under.
Step 1 check if it s level.