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-   -   Circuit board in outside unit has red light on. What is it? (https://www.askmehelpdesk.com/showthread.php?t=611480)

  • Nov 11, 2011, 10:39 PM
    rjennings2011
    Circuit board in outside unit has red light on. What is it?
    The unit/heat pump has a red and green light. The red light stays on and the green light is off . What does this mean?

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