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Thread: Penn tstat

  1. #1
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    Penn tstat

    Another company installed w/I freezer 8 months ago they put 3 penn tstats on since then was called out found freezer at 32 deg tstat set at minus 20f and not calling to cool put new tstat on unit is working good at minus 15f any ideas why it's going thru so many tstat only thing it controls is the solenoid coil
    Last edited by beenthere; 01-04-2020 at 09:54 AM.

  2. #2
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    Undersized wiring? Maybe the solenoid is the culprit.

  3. #3
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    Could be the solenoid itself is damaged and causing the coil to over draw current on the tstat.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  4. #4
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    Could be those stats are junk like Nest !

  5. Likes BALloyd liked this post
  6. #5
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    Try RANCO's

    better yet E2

  7. #6
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    Quote Originally Posted by VTP99 View Post
    Could be those stats are junk like Nest !
    another thing jci has turned to poo
    Honeywell you can buy better but you cant pay more

    I told my wife when i die to sell my fishing stuff for what its worth not what i told her i paid for it

  8. #7
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    Quote Originally Posted by crazzycajun View Post
    another thing jci has turned to poo
    Yep just recently I've seen where they put the Penn name on them and painted them black.
    Like as if we're that easily fooled

  9. #8
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    Peppers, those stats used to last for years. Now they are lucky to last a year.

  10. #9
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    Thread Starter
    They replaced the solenoid coil on the last tstat they replaced 1.5 months ago

  11. #10
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    Quote Originally Posted by AKREFER View Post
    They replaced the solenoid coil on the last tstat they replaced 1.5 months ago
    Still could be a problem with the solenoid itself.
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    How many times must one fix something before it is fixed?

  12. #11
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    It would be helpful to know how the thermostat failed. By that I mean did its setting drift from -20°F to +32°F which would indicate a loss of charge in the sensing element or were the output contacts fried as if they were subjected to a high current?

    In the past, I used the A19 Penn as my go-to temperature control for walk-ins and in the last 10 years or so found an increasing rate of failures involving a drifting of the setting. I also noticed they were sensitive to vibrations from things like something like a beer keg hitting the wall. In all my years I don't recall any that had failed contacts, even when hit by a dead short.

  13. #12
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    Pay attention to how it is mounted. Any flexing or twisting of the backplate (over and existing grommet or screw) may affect the functioning.

  14. Likes bacciagalupe liked this post

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