Bunn Steam Leak / Venting Issue

Bunn coffee maker makes loud hissing or steam escaping sounds from the top or sides.

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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.

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Possible Causes

Damaged tank lid gasket, Loose tank cover screws, Cracked tank fitting, Blocked vent path

How to Fix / Troubleshooting

Safety: Steam can cause severe burns. Turn off and unplug the brewer and allow it to cool completely before inspection.

Steps:

  • 1. Inspect tank lid: Remove the top cover and check the stainless tank lid and gasket. Tighten any loose screws evenly.
  • 2. Replace gasket: If the gasket is hardened, cracked, or flattened, replace it with the correct Bunn tank lid gasket.
  • 3. Check vent path: Ensure any designed vent holes or tubes are not blocked by debris or scale.
  • 4. Examine fittings: Inspect all tank fittings for cracks or leaks where steam could escape. Replace any damaged fittings.
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Repair Difficulty

Medium 3/5

Required Part

Tank Lid Gasket
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