This video is a video on setting up a Penn A421 digital control for a medium temp application. It shows the “basic” options as the advanced menu would be specific to a particular job site.

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11 thoughts on “How to set up Penn A421 Digital Temp Control

  1. minesh patel says:

    I have same control for my meat case. Its not keeping the temp between 35-40 in meat case. Even at night time when curtains are closed. Its freezing up. What could be the problem here sir?

  2. Dan says:

    Hi Gus. Thank you for posting this very informative video. The manual is not very clear in how to change the settings to Celsius. Can you help?

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