Results 1 to 6 of 6
  1. #1
    Join Date
    Dec 2004
    Location
    Indiana
    Posts
    11
    The display on the LCD thermostat is blank and the Air Conditioning will not come on. Any thoughts where to start looking for the problem?

  2. #2
    Join Date
    Nov 2002
    Posts
    230
    Secondary drain saftey cutout switch on the evaporator drain I.E. clogged water drain.

  3. #3
    Join Date
    Dec 2004
    Location
    Indiana
    Posts
    11
    Thanks, is it a float type switch and where is it normally located?

  4. #4
    Join Date
    Jun 2003
    Location
    Florida
    Posts
    9,548
    Does your t-stat take batteries? Time for the yearly clean and check.You have no low voltage if stat doesn't take batteries. Call for service.
    If everything was always done "by the book"....the book would never change.

  5. #5
    Join Date
    Nov 2002
    Posts
    230
    Originally posted by smworth
    Thanks, is it a float type switch and where is it normally located?
    Already told you, on the evaporator. Look for water drain pipes. If you can't find those you're in over your head.

    Before all chime in and say it's not a DIY site, this may only be a clogged drain. If it's not then a tech will be needed to figure out why the control voltage is not there.

  6. #6
    Join Date
    Dec 2004
    Location
    Indiana
    Posts
    11
    OK Guys, I found a blown 3 amp fuse on the main circuit board. I also found a short in the 24 volt feed to the compressor relay. It looks like it shorted from the vibration of the unit ( inside the junction box).

    All's well. Thanks again for your help.

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