Danger
Potentially Dangerous
Injury may result if this procedure is not followed properly. Use caution and follow all warnings.
Danger

Introduction

The Comfort Zone CZ442 will produce a loud screeching noise if the motor is jolted out of alignment. Left in this state, the motor may eventually burn out completely. This guide covers the realignment of the motor.

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  • Remove the four rear Phillips screws. Apply firm pressure when removing all screws to prevent stripping.

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  • Carefully remove the front heater panel.

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  • Remove the four Phillips mounting screws from the heater assembly.

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  • Slide the top control switch panel out. Be careful not to pull, or apply excess pressure to, any of the wires.

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  • Using pliers, remove the fan’s center mounting nut.

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Image 1/1: Pull from the center of the fan. Do not pull on the fan blades.
  • Pull firmly to remove the fan from the motor.

  • Pull from the center of the fan. Do not pull on the fan blades.

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  • Slightly loosen both of the motor retainer screws about one full rotation.

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  • Push down on the motor bracket and adjust the motor by hand so it spins freely and does not scrape.

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Image 1/1: Make sure that the heater selector is clearly turned to the "Fan" setting. Any other setting could cause burns, fire, or electric shock.
  • Turn the thermostat selector fully clockwise, and the heater selector to “Fan.”

  • Make sure that the heater selector is clearly turned to the "Fan" setting. Any other setting could cause burns, fire, or electric shock.

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Image 1/3: The safety switch's normal function is to turn off the heater automatically if it tips over. Here, however, we can use it as a button to test the fan. Image 2/3: The safety switch's normal function is to turn off the heater automatically if it tips over. Here, however, we can use it as a button to test the fan. Image 3/3: The safety switch's normal function is to turn off the heater automatically if it tips over. Here, however, we can use it as a button to test the fan.
  • Make sure the safety switch on the bottom of the heater is not being pressed. Wear the leather gloves, and plug in the heater.

  • The safety switch's normal function is to turn off the heater automatically if it tips over. Here, however, we can use it as a button to test the fan.

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Image 1/2: Keep your fingers clear of the motor while it is spinning. Image 2/2: Keep your fingers clear of the motor while it is spinning.
  • Press the safety switch briefly to confirm that the motor can spin. Slightly tighten the screws and adjust the motor's alignment by hand until it can spin freely. A light rattling or noise is fine and will be fixed later.

  • Keep your fingers clear of the motor while it is spinning.

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  • Stand the heater case up, so the safety switch is pressed, and the motor is on.

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Image 1/2: If the screws are too loose, the motor will rattle or screech. If the screws are too tight, the motor cannot turn. Image 2/2: If the screws are too loose, the motor will rattle or screech. If the screws are too tight, the motor cannot turn.
  • While the motor is running, slowly tighten the retainer screws until the motor runs smoothly and quietly.

  • If the screws are too loose, the motor will rattle or screech. If the screws are too tight, the motor cannot turn.

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  • Set the case back on its side, so the safety switch is no longer pressed, and the motor turns off.

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Image 1/1: Press on the center of the fan only. Do not push on the fan blades.
  • Align the fan to the motor axle, and press firmly to reattach it.

  • Press on the center of the fan only. Do not push on the fan blades.

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Image 1/1: Make sure your hands and other objects are clear of the fan
  • Briefly press the bottom safety switch to verify that the fan runs smoothly and quietly. If it does not, return to step 6.

  • Make sure your hands and other objects are clear of the fan

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  • Unplug the heater.

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  • Reverse steps one through five to reassemble the heater.

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  • Test the heater to verify that everything is working quietly and properly

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Finish Line

Adam Moser

Member since: 02/10/2016

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1 Guide authored

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