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Actuator Help

Rdriver
Rdriver Member Posts: 4

Hello there. I'm struggling with replacing an actuator. While replacing it, I'm now trying to figure out if the valve is a mixing valve or a diverter valve. Attached are pics. Can anyone help me determine if it's a mixing valve or a diverter valve, and recommend a replacement actuator? Thank you so much.

IMG_2989.jpeg IMG_6467.jpeg IMG_6468.jpeg IMG_3101.jpeg

Comments

  • hot_rod
    hot_rod Member Posts: 25,747
    edited October 9

    It is a 4 way mix valve for low temperature heaters. Do you have radiant heat in the home?

    InFloor private labeled that valve, I believe it is a tekmar brand, # 722 so you have other actuator options.

    Check both the actuator and that tekmar control to be sure which has a problem.

    Screenshot 2025-10-09 at 8.58.34 AM.png
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Rdriver
    Rdriver Member Posts: 4

    Yes, I have radiant floor heating, and the actuator hasn't moved in a year. How do I test to see if the actuator has the problem, or if it's the control? here's a closeup of the control

    IMG_6466.jpeg
  • Rdriver
    Rdriver Member Posts: 4

    I should add that the valve moves freely when I put the actuator into manual model.

  • hot_rod
    hot_rod Member Posts: 25,747

    you need a meter to first check power to the tekmar control, then output from the control

    Tekmer website probably has a manual with troubleshooting procedures on the control

    That control is 25 years old, probably the actuator also

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • hot_rod
    hot_rod Member Posts: 25,747
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Rdriver
    Rdriver Member Posts: 4

    @hot_rod Thank you so much!