Kelvinator KD14SS, 4-5 years old and used daily. It is making a Humming, buzzing sound after 1-2 minutes into any cycle. Lasts throughout the programme in stages. NO ERROR MESSAGE. I have taken out trays and made sure all Arms are securely clipped in. It Finishes the cycle, dishes are perfect, water drains completely. I put in Rinse aid for the first time in 4 years yesterday. Salt and Rinse Aid indicators are both off on the display. Please help.

Joanie, September 2011