Reset your BUNN by unplugging it for 30 seconds, then plugging it back in

A soft reset — unplugging the machine and waiting half a minute — fixes most BUNN problems: water not heating, the brewer not turning on, or a stuck display. Unplug the machine completely, wait 30 seconds, then plug it back in. The brewer will cycle through its startup sequence and usually return to normal operation.

If the soft reset does not work, the next step depends on what is actually wrong. BUNN makes several models — drip brewers, pod machines, and commercial units — and each one has a different reset path. The model number is printed on a sticker on the back or bottom of the machine.

Key Takeaways

  • A soft reset (unplug for 30 seconds, plug back in) solves heating, power, and display problems on most BUNN models.
  • BUNN brewers with a digital display may have a dedicated reset button on the control panel or underneath the machine.
  • If water is not heating after a reset, the heating element may have failed and the machine will need repair or replacement.
  • Descaling the machine with a BUNN-approved cleaner once a month prevents mineral buildup that can trigger error codes.

Soft reset: the first step for any BUNN problem

Unplug the coffee maker from the wall outlet. Wait a full 30 seconds — do not rush this step. Plug it back in and let it run through its startup cycle, which usually takes 10 to 15 seconds. The display will light up, the heating element will warm, and the machine will beep or show a ready light.

This reset clears temporary errors in the machine's memory and restarts the heating system. It works for machines that will not turn on, displays that are frozen, water that is not heating, or brewers that are stuck mid-cycle. If the machine still does not work after the soft reset, move to the next step for your specific model.

Finding the reset button on your BUNN model

Some BUNN brewers have a physical reset button. On drip machines like the BX and BXB series, look on the front control panel — it is usually a small red or black button labeled "Reset" or "Clear." Press and hold it for three to five seconds, then release. The display will clear and the machine will restart.

On other models, the reset button is underneath the machine or on the back panel. Check your user manual for the exact location — BUNN publishes manuals for every model on its website, searchable by model number. If you cannot find a physical button, your model may only support the soft reset method.

Pod-based BUNN brewers (like the My Café series) rarely have a dedicated reset button. For these machines, the soft reset is usually the only option. If a pod brewer still will not work after unplugging and replugging, the issue is likely a failed heating element or pump, which requires professional repair.

Clearing error codes and display messages

If your BUNN shows an error code like "E1," "E2," or "Descale," the machine is telling you something specific is wrong. Write down the exact code or message before you reset, because it will disappear once you unplug the machine.

A "Descale" message means mineral buildup is blocking the heating system. Run a descaling cycle using BUNN Cleaner (the official product) or white vinegar. Fill the water reservoir with the cleaner, run it through the brew cycle into an empty carafe, then run plain water through twice to rinse. This usually clears the error without a full reset.

Error codes like "E1" or "E2" point to heating or sensor failures. A soft reset may clear them temporarily, but if the code comes back within a few brews, the heating element or temperature sensor has likely failed and the machine will need repair or replacement.

When the machine still will not work after reset

If your BUNN does not heat water even after a soft reset and descaling, the heating element has probably burned out. This is not something you can fix at home — the element is soldered inside the machine and requires professional service. Contact BUNN customer service with your model number to find an authorized repair center, or check whether the cost of repair is worth replacing the machine.

If the machine turns on but will not brew, the pump may be stuck or the water line may be blocked. Try running hot water through the brew head without a filter basket or carafe to see if water comes out. If nothing flows, the pump or internal line needs service.

If the display is dark or frozen even after reset, the control board may have failed. Again, this requires professional repair. BUNN offers a one-year warranty on most home brewers, so if your machine is less than a year old, contact BUNN to arrange a replacement or repair at no cost.

Preventing problems with regular maintenance

Descale your BUNN once a month if you have hard water, or every two months if you have soft water. Hard water leaves mineral deposits that clog the heating element and eventually trigger error codes or heating failures. Regular descaling extends the life of the machine by years.

Use filtered or distilled water if possible — it reduces mineral buildup significantly. Empty the water reservoir if you will not use the machine for more than a week, because stagnant water can grow bacteria and affect the taste of your coffee.

Clean the brew basket and carafe after every use. Do not put the carafe in the dishwasher if it has a thermal coating, because heat and detergent will damage it. Hand wash with warm soapy water instead.

Frequently Asked Questions

How long should I wait before plugging the BUNN back in?

Wait a full 30 seconds. This gives the machine's internal capacitors time to fully discharge and clears any stuck data in the control board. Plugging it back in after just a few seconds usually does not work.

Will resetting my BUNN erase my settings?

A soft reset does not erase brew strength, brew time, or other user settings on most BUNN models. The machine will return to its default startup state, but your saved preferences should remain. Check your manual for your specific model, as some older machines may reset to factory defaults.

What does the descale message mean?

It means mineral deposits have built up inside the heating chamber and are blocking water flow. Run a descaling cycle with BUNN Cleaner or white vinegar to dissolve the minerals. This is not a hardware failure — it is normal maintenance that takes about 15 minutes.

Can I reset a BUNN coffee maker without unplugging it?

No. A soft reset requires a complete power loss, which only happens when you unplug the machine. Turning it off with the power switch does not discharge the internal circuits. Always unplug from the wall outlet.

What if my BUNN still will not heat water after I descale it?

The heating element has likely failed. This requires professional repair or replacement of the machine. Contact BUNN customer service with your model number to find a repair center or check warranty coverage.