Dishwasher making noise at start of cycle

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Whirlpool WFC3C33PFXUK noise at start of cycle

The problem

A Whirlpool WFC3C33PFXUK dishwasher made a loud noise only at the start of the programme. Once the cycle was underway, it ran quietly for the rest of the wash.

Likely cause

The accepted reply said the machine likely energises the pump after an initial fill and the reported sound resembles pump operation. A possible explanation discussed was the pump running with little or no water at the very start, but this was not confirmed.

What fixed it

No repair was confirmed. The accepted response indicated the sound may be normal pump operation at the beginning of the cycle. It was also noted that if the pump itself were faulty, a similar noise would be expected each time the dishwasher drained, which was not reported. The thread was marked solved without a documented repair.

Checks to try

• Noise occurs only at the start of the cycle
• Dishwasher is quiet for the rest of the cycle
• Video was reviewed, but the sound level was too low to assess clearly
• Consideration was given to whether the pump noise would also occur during later drain phases