Appliance Component Testing Resistance Values

Home appliance repair often calls for continuity and resistance testing to validate whether a part is still working.

Below are lists for both acceptable or typical values for different load and non-load elements. Your measured resistance values might not fall within the given ranges and still be operational. Some of the values below are empirical (or measured) and the ranges have been estimated. Use your best discretion, and consult a professional if unsure.

Note: Type ALT-Z to make the Ohm (Ω) symbol.

• heating elements (0-120Ω)
  • ice maker mold heater (60-80Ω)
  • Samsung defrost Heater (120Ω)
  • Whirlpool Defrost Heater (88Ω)
• solenoids (on/off > 10Ω, and regulating < 10Ω)
  • ice maker Dispenser Solenoid (10-500Ω)
• motors (10-200Ω)
  • ice maker Motor (400-600Ω)
  • ice maker Auger Motor (5-50Ω)
  • submersible pumps (2MΩ)
  • Dishwasher Drain Pump (15-40Ω)
  • Circulation Pump (10-100Ω)
• Fridge Compressor (1-50Ω)
• Water Inlet Valve (500-1.5KΩ)

• switches (0Ω- OL)
  • door switches (0Ω- OL)
• Bi-metal switch (0-1Ω)
• thermostats (0Ω- OL)
• thermistors (2-220KΩ)
  • Check the spec for your specific thermistor since there is such a large variance, and make sure you test at the appropriate temperature. This may be 32 deg F (0 deg C).
    • NTC Ω decreases as temperature increases
    • PTC Ω increases as temperature increases
• fuses (<1Ω)
• overload relay (0-1Ω)
• start relay (0-5Ω)

Feel free to contribute more values by editing this page (it's a wiki!) or in the comments or answers below.