How to Troubleshoot Electrical Sequencers

An electric sequencer is a device, often used on electrical fireplaces, that intermittently shuts off power to an appliance to prevent a dangerous surge in power. When the sequencer does malfunction, it prevents the entire electrical system from working. Troubleshoot your electrical sequencer if your electrical appliance no longer turns on. A simple visual inspection and some tests with a multimeter can determine whether or not your sequencer is causing the problem of if you need to look elsewhere.

Screwdriver
Multimeter

Instructions

- 1
  Turn off all the power to the electrical appliance. No power can run through any of the circuitry before you remove the sequencer.
- 2
  Disconnect the sequencer from the electrical appliance using a screwdriver. Place the screw in a safe location as to not lose it before you refasten the sequencer.
- 3
  Inspect the sequencer for physical damage. If the sequencer failed, a dangerous power surge likely occurred, which caused the sequencer to burn. The sequencer has a charred appearance and the terminals at both ends sometimes burn off when this occurs. Replace the sequencer if you see this damage.
- 4
  Test the resistance of the sequencer by placing a multimeter's prongs at the end of both terminals. A typical reading for a fully functional sequencer is 20 ohms. Any other reading indicates a possible malfunction.
- 5
  Change the settings on the multimeter to a continuity test. A continuity tests detects an electrical connection between two points. Most multimeters use a buzzing or ringing sound to indicate continuity. Place the two prongs on the two terminals and wait for the sound. Replace the sequencer if the multimeter cannot detect any continuity.

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