Customer Questions and Answers for Idler Arm Assembly (Belt Tensioner) by Whirlpool

This idler arm assembly keeps the dryer drive belt under proper tension so the drum turns smoothly. Replacing a worn idler restores belt tracking and reduces noise from a failing tensioner. What it does:

• Holds and tensions the dryer drive belt to maintain proper belt tracking
• Keeps the belt aligned on the drum and motor pulley to prevent slipping
• Worn or seized idler can cause squealing, grinding, or premature belt wear
• A failed idler may lead to belt damage or the drum not turning properly

• Disconnect power (and gas supply for gas dryers) before beginning any repair
• Access may require removing the dryer front panel or drum—follow your model's service instructions
• Support the drum and belt while removing the old idler to avoid damage
• Inspect the belt, motor pulley, and rollers while replacing the idler; replace worn components as needed