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  1. #14
    Join Date
    Jan 2006
    Location
    McQueeney, Texas
    Posts
    3,866
    You need to install a tstat between the red wires to regulate the outdoor unit.

  2. #15
    Join Date
    Apr 2007
    Location
    TIP-O-TX
    Posts
    278
    Down here C is for caliente
    Quote Originally Posted by ldmth44 View Post
    Worked with a guy some years back that couldn't figure out that the flashing "AC" on an old battery backup thermostat meant no AC power, he thought it meant no air conditioning. Should have seen him trying to figure that one out since the control transformer was on same fuse as condenser fan circuit in a Lennox RTU (one fan motor took a dump). Almost had a dead tech--he wanted to jump 460 vac to 24 vac control circuit to power up tstat. I told him to go sit in the truck and rethink his career.

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