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Electrical Wire and Cable

Checking Baseboard Heating Units

How to Check a Baseboard Electric Heater if the unit is not working properly


Electrical Circuits and Baseboard Heaters

I’m having a problem with my baseboard heaters.

This electrical question came from: A Homeowner from , Alabama.

Dave’s Reply:
Thanks for your electrical question.

How to Check a Baseboard Heater

Electric Baseboard Heaters

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MORE ABOUT THIS TOPIC: Wall Heater

Frequently Asked Questions and Comments

Questions about: Checking Baseboard Heating Units


  1. Gordon says:

    I have 6 baseboard heaters controlled by one thermostat. The thermostat burned out and I replaced it. The heaters are all getting 240 volts now but none of them heat.

    • Dave Rongey says:

      Hi Gordon,
      Six baseboard heaters on one thermostat sounds like quite a load, and you have not provided information about watts, so lets be sure about the electrical circuit integrity: The electrical circuit must be sized for the total connected load of all of the heaters and this must follow the guidelines as stated within the installation manual of the baseboard heater manufacturer as well as all the applicable electrical codes, and the circuit wiring should be installed by permit and inspected. I am mentioning this because thermostats rarely burn out unless the circuit is overloaded, so we want to be sure the circuit has been installed correctly according to code and not overloaded. With that in mind, make sure that the thermostat is rated for the combined load of all six baseboard heaters and make sure that the 240 volt circuit connections are correct.
      TESTING A 240 VOLT CIRCUIT: On a 240 volt circuit there should be a 120 volt reading to ground for each circuit conductor, and a 240 volt reading between the two circuit conductors. If these readings are correct then there may be a problem with the electric baseboard heaters, but that is unlikely. You may try removing all but one heater from the circuit wiring and see if the problem persists, but again, make sure the circuit is correct and installed according to the installation manual and applicable electrical codes for electric heaters.
      Be Safe!
      Dave

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