Troubleshooting: All Chambers
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      1. AES Knowledgebase
      2. Environmental Test Chambers
      3. Troubleshooting: All Chambers

      Why does my test chamber have a temperature pull up above the controller setpoint?

      Your unit may have a temperature pull up above the controller setpoint because of the calibration of the controller, a defective temperature controller, or a defective relay.

      The control is satisfactory. However, it's at an incorrect temperature. Check this possible cause and solution:

      The temperature controller may be out of calibration.
          SOLUTION: Calibrate the temperature controller.

       

      The heater is energized continuously. This may result in damage to the test chamber and its contents.  Check out these possible causes and solutions: 

      The temperature controller of the unit is defective.
          SOLUTION: Replace the defective controller.
      The relay is defective. This occurs only with models that have relays.
          SOLUTION: Replace the defective relay.
      The heater has shorted to ground.
          SOLUTION: Determine ground and correct.

       

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