moved my keurig to a new apartment and now it won't brew, just flashes lights. what do i do?

Diagnosis

The flashing lights on a Keurig K-Supreme after a move typically indicate a "Prime Failure" or a system airlock. During transport, the water reservoir is emptied and the internal pumps often suck in air bubbles. Because the K-Supreme uses a high-pressure pump system to achieve its "Supreme" flavor profile, these air pockets create a vacuum lock that prevents the machine from pulling water from the tank, triggering a safety lockout indicated by the flashing LEDs.

Additionally, if your move involved a significant change in elevation—specifically moving to a location above 5,000 feet—the atmospheric pressure change affects the pump's ability to push water through the needle. The machine detects the lack of flow and enters an error state. Finally, if the unit was transported in a cold vehicle, the internal seals may have contracted or residual moisture may have frozen in the narrow tubing, preventing the pump from engaging.

How to Fix It

Follow these steps to clear the airlock and reset the system sensors:

1. Thermal Stabilization: If the machine was in a cold environment, unplug it and let it sit at room temperature (approx. 70°F) for at least 4 hours. Attempting to force a brew while the internal components are cold can damage the pump seals.
2. The "Hard Prime" Sequence: Fill the water reservoir to the MAX line with room-temperature filtered water. Ensure the reservoir is seated firmly; lift it and snap it back down to ensure the valve at the bottom is fully open.
3. Air Purge Cycle: Insert a K-Cup pod (or use the reusable filter). Close the lid firmly. Press the "8oz" button. If the lights flash and it stops, open and close the lid rapidly three times. This often "jiggles" the internal valve to release trapped air.
4. High Altitude Calibration: If you are now located above 5,000 feet, you must manually override the pump settings. With the machine powered on, press and hold the Brew button and the 8oz button simultaneously for exactly 3 seconds. The lights will flash once to confirm the High Altitude mode is active.
5. Power Cycle: Unplug the unit from the wall outlet for 60 seconds. Plug it back in and attempt a "Water Only" brew (without a pod) to clear the lines.

If That Didn't Work

• Manual Needle Clearing: The needles in the K-Supreme are prone to clogging with coffee grounds during the vibrations of a move. Use a straightened paperclip to gently poke into the exit needle (the one that punctures the bottom of the pod) and the entry needle (top) to ensure no debris is blocking the flow.
• Reservoir Valve Inspection: Check the rubber gasket at the bottom of the water reservoir. If it shifted during the move, it may be leaking air. Clean the valve with a damp cloth and ensure there is no debris preventing a vacuum-tight seal between the tank and the machine base.
• Descaling Force-Flush: Even if the machine is new, air pockets can sometimes be mistaken for scale buildup. Fill the tank with a 50/50 mix of white vinegar and water. Run the largest brew cycle possible without a pod. The acidity and different viscosity of vinegar can sometimes help push air bubbles through the pump that plain water cannot.
• Reset the Circuitry: If the lights continue to flash in a specific pattern, perform a factory reset by unplugging the unit, holding the brew button for 10 seconds while unplugged, and then plugging it back in.

Heads Up

• Water Quality: Always use filtered water. The K-Supreme has smaller internal tubing than older Keurig models, making it significantly more susceptible to calcium buildup which mimics the "flashing light" airlock error.
• Lid Pressure: Ensure the handle is pushed down completely. If the lid is slightly ajar, the sensor will prevent the pump from engaging to avoid spraying hot water.
• Avoid "Dry Brewing": Never attempt to run the brew cycle without water in the reservoir. This can cause permanent damage to the pump motor, leading to a permanent error state that requires hardware replacement.
• Storage Tip: When moving the machine in the future, always drain the reservoir completely and store the unit upright to prevent water from seeping into the electronic control board.