P1
Ultima Cosa
Input Power Voltage Error (Low or High Line Voltage)
P1 flashes and the unit will not start; sometimes accompanied by beeping.
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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
Household voltage outside specification, Loose power cord connection at internal terminal block, Damaged power cord, Faulty power supply section on main control PCB
How to Fix / Troubleshooting
Safety first: Unplug the air fryer before opening any covers. Do not operate the unit on an unstable or undersized power source.
- Check outlet: Plug the air fryer into a known-good, properly grounded outlet. Avoid extension cords or power strips.
- Test voltage: If you have a multimeter and training, verify that the outlet voltage matches the rating on the Ultima Cosa nameplate (e.g., 120 V or 220–240 V).
- Inspect power cord: Look for cuts, kinks, or burn marks. If damaged, replace the power cord with the correct Ultima Cosa-rated cord.
- Check internal connections: Remove the rear cover and inspect the power cord entry and terminal block. Tighten any loose screws and ensure no discoloration or melting is present.
- Control board power supply: If external power is correct and connections are solid, the internal power supply on the main control PCB may be faulty and require board replacement.
If you are not comfortable working with mains voltage, seek professional service.
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Repair Difficulty
Hard
4/5
Required Part
Power Cord and Terminal Block
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