Oster Brew Start Interlock / Control Logic Fault

Oster coffee maker powers on but will not start brewing when the BREW button is pressed.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Carafe not detected or not seated, Brew basket door not fully closed, Faulty start button or keypad, Control board logic failure

How to Fix / Troubleshooting

Safety first: Unplug the unit before manipulating mechanical parts.

Check all interlocks:

Ensure the carafe is fully seated and the warming plate is clean.
Verify the filter basket is properly installed and the lid is fully closed until it clicks.
On models with a swing-out basket, make sure it is pushed completely in.

Button and settings:

Confirm the clock is set if your model requires it for programmed brewing.
Try pressing and holding the BREW button for a second instead of a quick tap.
Test other buttons to see if the keypad responds normally.

Internal checks (advanced):

Inspect the basket-closed switch and carafe switch for proper operation and continuity.
If switches test good, the control board or keypad membrane may be faulty.

Repair Difficulty

Medium 3/5

Required Part

Brew Basket Lid Switch

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