H1
Vida by PADERNO
Heater Relay Stuck Closed / Uncontrolled Heating
Display shows H1 or similar and the unit overheats or cycles erratically, sometimes with very high temperatures.
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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
Heater relay welded contacts, Shorted triac or transistor on control board, Control board logic failure, Short between heater and line bypassing control
How to Fix / Troubleshooting
Safety first: Unplug the air fryer immediately. Do not continue using the unit until repaired; fire risk is present.
- Step 1 – Allow cooling: Let the unit cool completely before opening.
- Step 2 – Inspect heater wiring: Remove the cover and check for any obvious shorts where heater wires may be touching the chassis or bypassing the relay.
- Step 3 – Examine control board: Inspect the main control board for burnt areas around the heater relay or power devices. A welded relay may show heat discoloration.
- Step 4 – Replace board: Replace the main control board if any signs of damage are present or if the heater energizes as soon as the unit is plugged in.
- Step 5 – Verify safety devices: Confirm that the high-limit thermostat and thermal fuse are intact and correctly mounted after repair.
Warning: Do not attempt to mechanically free a welded relay and continue using it; always replace the board.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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