On my 4 cup Mr. Coffee, one of two thermal cutoff fuses is open. If either/both of those fuses is open, no power will reach the heating element and the water won't boil nor will the warming plate feel hot even if the power switch is lit.
They can be checked with an ohmmeter/continuity tester.
The thermal elements are accessible by removing the plastic cover on the bottom.
I will bypass the failed fuse by wiring a new 216C/250v/10A device in parallel. All connections are crimped or spot welded so the new fuse leads will have to be wrapped around the existing leads.
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iFixit Staff Suggestion: view the [link|https://www.ifixit.com/Wiki/Coffee_Maker_Will_Not_Brew?revisionid=HEAD|coffee maker won't brew|new_window=true] page for additional causes and solutions for this issue.
On my 4 cup Mr. Coffee, one of two thermal cutoff fuses is open. If either/both of those fuses is open, no power will reach the heating element and the water won't boil nor will the warming plate feel hot even if the power switch is lit.
They can be checked with an ohmmeter/continuity tester.
The thermal elements are accessible by removing the plastic cover on the bottom.
I will bypass the failed fuse by wiring a new 216C/250v/10A device in parallel. All connections are crimped or spot welded so the new fuse leads will have to be wrapped around the existing leads.