CONCERN: Customer reports dryer is not heating. DIAGNOSTIC AND CAUSE: Inspected dryer for proper voltage from the wall to the cord terminal block, voltage normal. Inspected voltage from terminal block to dryer control assembly, voltage normal. Inspected continuity on all thermal safety thermostats, all thermal safeties are normal. Inspected continuity at heater element, found dryer heating element failed. CORRECTION: Replaced dryer heating element and tested. Operation now normal. CONCERN: Dryer is making a loud noise when tumbling. DIAGNOSTIC AND CAUSE: Inspected dryer barrel operation, operation normal. Inspected blower wheel for restrictions, no restrictions in or around blower wheel. Found dryer drum support rollers failed. CORRECTION: Replaced rollers, belt, and idler pulley. Operation now normal