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Appliance Error Codes

Error Code F42 on Hisense HUI6220XCUS Dishwasher | Causes & Fix

Error F42 on Hisense : Temperature sensor fault — NTC thermistor reading out of range. Follow the troubleshooting steps below to diagnose and fix this dishwasher issue. ## What Error Code F42 Means on a Hisense HUI6220XCUS Dishwasher The F42 error code on the Hisense HUI6220XCUS dishwasher indicates a NTC thermistor reading out of range. The control board monitors water level, temperature, drainage, and flood-protection sensors throughout the cycle. When a reading falls outside the expected window or a component fails to respond, the board halts the programme and displays the fault code. ## Symptoms - F42 at start of or mid-cycle

  • cycle aborts before completing wash phase
  • display shows unrealistic temperature
  • combined F41 + F42 if both heater and sensor have failed ## Common Causes - broken NTC sensor wire (OL reading)
  • short-circuited NTC (near-zero reading)
  • corroded NTC connector terminals
  • main board analog input circuit damaged ## Tools You May Need - multimeter
  • Phillips screwdriver
  • flat-head screwdriver
  • torch (flashlight)
  • towel and shallow tray ## Step-by-Step Repair Guide | Step | Action | Result | |------|--------|--------| | 1 | Cancel the cycle and unplug the dishwasher | Check complete | | 2 | Remove the lower spray arm and filter basket to access the sump area | Check complete | | 3 | Disconnect the NTC connector and measure resistance at room temperature | Check complete | | 4 | Inspect the sensor wiring harness for damage, kinks, or corroded terminals | Check complete | | 5 | Reinstall all components, restore power, and run a Normal cycle | Check complete | ## Safety Precautions Always disconnect the appliance from mains power before opening any panels or accessing internal components. Allow the unit to cool completely before handling any element, compressor, or heat-producing part. Work in a dry area and keep a towel on the floor when dealing with water-connected appliances. Do not bypass safety interlocks, and ensure the power cord is fully unplugged — not just switched off at the control panel — before measuring component resistance. ## When to Call a Technician Call a qualified appliance technician if: - the base tray shows signs of tub cracking or sealed system damage
  • the main control board requires replacement
  • the error persists after all accessible components have been replaced
  • water damage to kitchen flooring or cabinetry requires professional assessment ## Preventing Future Faults - clean the filter assembly monthly (or more frequently with heavily soiled loads)
  • use the correct amount of HE dishwasher detergent
  • run a maintenance descaling cycle every 3–6 months in hard-water areas
  • inspect the door gasket annually and replace if worn or cracked
  • ensure adequate water pressure — minimum 0.5 bar (7 psi) at the supply valve ## Frequently Asked Questions ### Is it safe to keep using my Hisense with error F42? If error F42 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 F42 on a Hisense ? Repair costs for error F42 on the Hisense 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 Hisense-authorized service provider for an accurate estimate based on your specific situation. ### What does error code F42 mean on a Hisense dishwasher? Error code F42 on Hisense dishwasher models indicates Temperature sensor fault — NTC thermistor reading out of range. 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 Hisense with error F42? If error F42 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 F42 on a Hisense ? Repair costs for error F42 on the Hisense 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 Hisense-authorized service provider for an accurate estimate based on your specific situation. ### What does error code F42 mean on a Hisense dishwasher? Error code F42 on Hisense dishwasher models indicates Temperature sensor fault — NTC thermistor reading out of range. 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.