If
your dishwasher seems to be louder than normal, there are several
things to check:
1)
Check the motor for vibration. Wiggle the sprayer arm and feel for
excessive play. If so, tighten the mounting bolts.
2) When the bearings in a motor start to wear, they can become
quite loud when the motor is running. Sometimes the seal separating
the motor from the water can wear out, allowing water to flush the
grease on the bearings away. Replace motor.
3) When an inlet valve is wearing out there is too much play
in it, causing it to vibrate excessively when water is flowing thru.
You would hear a knocking sound.
4) Check for any loose debris stuck in the pump.
5) If the noise is occuring during the drying cycle, consider
the heater fan (motor) to be the culprit. Resort to air drying until
repairs are made.
6) Improperly installed dishwashers can cause noise problems.
It might need to be leveled, or rubber mounting pads might need
to be installed on the bottom of the dishwasher.
7) The sprayers could be rubbing against the strainer or
tub. Readjust them.
