Rangemaster Thermostat / Sensor Under-Reading or Element Underheating

Oven temperature too low; undercooked food even after extended cooking times.

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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

NTC sensor high resistance, Worn heating element, Faulty thermostat contacts, Poor door seal

How to Fix / Troubleshooting

Safety first: Disconnect from mains before testing components.

  • 1. Use an oven thermometer: Confirm that the oven is underheating compared to the set temperature.
  • 2. Inspect door seal: Replace if there are visible gaps or damage.
  • 3. Test elements: Measure resistance of each element and compare to specification. Replace any that are significantly higher resistance or visibly damaged.
  • 4. Check sensor/thermostat: Test the NTC sensor resistance at room temperature and at a known elevated temperature (if possible). Replace if readings are out of range. For mechanical thermostats, replace if contacts are pitted or not switching reliably.
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Repair Difficulty

Medium 3/5

Required Part

Main Oven Temperature Sensor (NTC Probe)
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