C2
Instant Pot High-temperature sensor circuit fault (sensor 2 / secondary sensor)

Instant Pot displays C2 and will not start or stops shortly after starting.

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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

Secondary temperature sensor failure, Loose or damaged sensor wiring, Failed main control board (PCB), Corroded or burnt connector on sensor harness

How to Fix / Troubleshooting

Safety: Unplug the cooker and let it cool fully before inspection.

  • 1. Hard reset: Disconnect power for 10–15 minutes, then reconnect and try a basic program. If C2 returns, proceed.
  • 2. Inspect base for damage: Remove the inner pot and examine the heating plate and center sensor area. Look for burn marks, discoloration, or melted plastic that may indicate overheating.
  • 3. Check for spills: If food or liquid has overflowed into the base, gently clean the exposed metal surfaces with a slightly damp cloth (unit unplugged) and allow to dry completely for at least 24 hours.
  • 4. Gentle tap test: With the unit unplugged, gently tap around the base to see if any loose parts rattle, which may indicate a broken sensor or bracket.
  • 5. If under warranty: Do not open the housing; contact Instant Brands support. Internal sensor replacement requires opening the base and working near mains wiring.
  • 6. Out of warranty: A qualified technician can open the base, test continuity of the secondary temperature sensor with a multimeter, and replace the sensor harness or main PCB as needed.
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Repair Difficulty

Professional Required 5/5

Required Part

Secondary Temperature Sensor Harness
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