Troubleshooting your coffee maker before you've had your cup of coffee can be frustrating. Let's dig into this troubleshooting guide to get your morning cup brewing and start the day off right.
While this guide is focused first on automatic drip coffee makers, a good starting procedure for any device is to follow proper maintenance and cleaning practices — follow this coffee maker cleaning guide and replace old filters.
If using soft water, clean your machine with a 1:1 vinegar and water solution every 3 months; with hard water, every 1 month.
Clogged Lines
While regular cleaning helps prevent mineral clogging, buildup may still occur. Remove your bottom plate to access the water lines. The hoses can then be removed and visually inspected for buildup. Clean with soap and water and a small brush.
This is time to inspect the ball valve. This valve allows fluid to move forwards but not backwards, and can be tested in two ways. Shaking the valve will tell you if the ball is free and is a good sign it's functioning. If you remove the valve and can only blow air in one direction, the valve still works. If you cannot blow in either direction, clean the ball, and reassemble the valve.
Broken Thermostat
The thermostat is a safety switch that electronically energizes the heating element while there's water in the tank and disconnects or opens the circuit after the water is gone and it's only heating itself. Unplug your machine, grab a multimeter, and open the bottom cover. If the thermostat continuity tests as open, then it needs replacing.
Blown Fuse
If the thermostat tests as closed, then find and test the inline fuse. The fuse is a safety device designed to fail in the event of a runaway thermostat. If the fuse tests as open, replace the fuse.
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