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How to Test and Replace a Malfunctioning Oven Thermostat

Posted by: Jacob Hoffmeister 4 years, 3 months ago

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If a thermostat cannot get the right temperature even after recalibration, check if it is malfunctioning. Here are the easy steps to do this

  • Remove the back service panel to gain access to the thermostat. You can find the thermostat at the back of the control knob, where the heat is regulated.
  • Get a multi-meter VOM. Set it to RX1 scale and test the thermostat.
  • Disconnect the electrical lead wire from the thermostat terminal.
  • Clip one probe of the VOM to each of the thermostat terminals. You will see the meter registering a zero if the thermostat is still working. If there is a higher reading, then the thermostat is faulty.
  • Obtain the model number of your oven (typically located in the bakeware drawer). Use it to obtain a compatible thermostat for your oven – the current one will need to be replaced if it is faulty.
  • After you’ve tested for faulty wires using VOM, disconnect the terminal wires to the thermostat. Also pull off the control knob.
  • Remove the screws retaining the thermostat.
  • Some ranges have a wire connecting the thermostat to the oven, which operates a sensing bulb. This bulb controls the thermostat and is held by a bracket. Remove the screws holding the bracket. Slip out the wire, then the bulb, and finally the thermostat.

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