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Appliance Error Codes

Error Code E5 on Panasonic NP-TCM1 Dishwasher | Causes & Fix

Error E5 on Panasonic : Varistor or electrical protection component fault — supply protection circuit ab. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. ## What Error Code E5 Means on a Panasonic NP-TCM1 Dishwasher The E5 error code on the Panasonic NP-TCM1 compact dishwasher indicates a supply protection circuit abnormal. Panasonic NP-series dishwashers monitor water level, temperature, pump operation, and electrical protection circuits throughout each programme. When a parameter is outside the accepted range, the dishwasher stops and displays the fault code in the programme indicator display. ## Symptoms - E5 after power surge or lightning

  • dishwasher completely unresponsive after E5
  • burning smell from rear of machine
  • E5 combined with tripped circuit breaker ## Common Causes - MOV varistor on main PCB failed from voltage surge
  • adjacent board components damaged by same surge
  • repeated low-voltage events degrading varistor
  • main PCB power input circuit damaged ## Tools You May Need - multimeter
  • Phillips screwdriver
  • flat-head screwdriver
  • towel and shallow tray (for sump access) ## Step-by-Step Repair Guide | Step | Action | Result | |------|--------|--------| | 1 | Unplug the dishwasher immediately after E5 — a failed varistor can cause a sustained high current condition | Check complete | | 2 | Wait 10 minutes | Check complete | | 3 | If the varistor is visibly damaged, inspect adjacent board components for burn marks before replacing | Check complete | | 4 | Replace the varistor (requires desoldering) or replace the main PCB if multiple components are damaged | Check complete | | 5 | Connect the dishwasher through a surge-protected outlet before restoring power | Check complete | ## Safety Precautions Always unplug the dishwasher from the wall outlet before removing any panels or accessing the sump. Close the water supply valve before disconnecting any water-side components. Allow hot water and steam to cool before reaching into the sump. Do not bypass E4 overflow protection — resolve the root cause before restarting. After E5 (varistor fault), do not restore power without inspecting the main PCB for additional damage. ## When to Call a Technician Call a qualified appliance technician if: - the main control PCB requires replacement (E5)
  • the heating element or sump requires deep disassembly
  • the circulation pump requires replacement (E7, involves tub removal on built-in models)
  • the error persists after all accessible components have been inspected and cleaned ## Preventing Future Faults - run a descaling cycle monthly in hard water areas
  • clean the filter after every 4–6 wash cycles
  • use only dishwasher-specific detergent in the correct quantity
  • use a surge-protected outlet to protect the main board (prevents E5)
  • leave the door open after the cycle to air-dry and prevent scale on the NTC sensor ## Frequently Asked Questions ### Is it safe to keep using my Panasonic with error E5? If error E5 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error E5 on a Panasonic ? Repair costs for error E5 on the Panasonic dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Panasonic-authorized service provider for an accurate estimate based on your specific situation. ### What does error code E5 mean on a Panasonic dishwasher? Error code E5 on Panasonic dishwasher models indicates Varistor or electrical protection component fault — supply protection circuit abnormal. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue. ### Is it safe to keep using my Panasonic with error E5? If error E5 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the dishwasher with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error E5 on a Panasonic ? Repair costs for error E5 on the Panasonic dishwasher depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Panasonic-authorized service provider for an accurate estimate based on your specific situation. ### What does error code E5 mean on a Panasonic dishwasher? Error code E5 on Panasonic dishwasher models indicates Varistor or electrical protection component fault — supply protection circuit abnormal. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.