Duo-Therm furnace/AC problem

Discussion in 'Class A / Diesel Pushers' started by LEN, Feb 2, 2011.

  1. LEN

    LEN Senior Member

    Old 4-button thermostat will not power up.
    I've checked all breakers and all fuses that I can find, and still no joy.
    On-Off switch on thermostat works.
    Just the thermostat itself will not power up. No digital read-out at all.
    Any suggestions????

    LEN
     
  2. vanole

    vanole Senior Member

    Re: Duo-Therm furnace/AC problem

    Len,

    Try the reset procedure. Had this same problem a year ago while in Miami. Prior to reset though remove thermostat from wall and check cleanliness of phone/flat wire connection on back side. First time I looked thier had a dust bunny the size of Texas in their.

    Jeff

    The reset procedure is as follows:
    a. Turn the ON/OFF switch to ON. The display light with
    data should come on. If the light and data are not there,
    see Section B2 Cable Assembly.
    b. Depress mode to activate display light.
    c. Depress the bottom two buttons (up & down) together.
    d. While still holding the two buttons add the third from the
    bottom (mode) , hold all three for a few seconds.
    e. Release the third (mode) button.
    f. Release the bottom two (up & down) together.
    g. Depress the mode button. The display light should be
    off. If not, repeat steps 2 through 6.
     
  3. LEN

    LEN Senior Member

    Re: Duo-Therm furnace/AC problem

    Thanks but no joy!
    No display light at all.
    Think I need the B2 part.

    LEN
     
  4. vanole

    vanole Senior Member

  5. Triple E

    Triple E Senior Member

    RE: Duo-Therm furnace/AC problem





    Do you have another one in the bedroom or somewhere that you can switch location and see if it is the thermo or something upstream of the thermo.

    I also think Jeff has a name and number of a guy that will fix these things. I have one to send to him in the near future.
     
  6. vanole

    vanole Senior Member

    Re: Duo-Therm furnace/AC problem

    Len if you need his name let me know. I have used him once and he is greeeeeeeeeeeeat. Cost is around $90 incl shipping.

    Jeff
     
  7. LEN

    LEN Senior Member

    Re: Duo-Therm furnace/AC problem

    I think I am down to 2 possible answers.
    1. Thermostat is bad.
    2. Phone wire from Thermostat to AC controller is broke.
    I'm leaning to #1.
    Yes I could use name # or what ever.
    For $300 over Ebay I can get the 5 button stat and two boards 1 for each AC.
    LEN
     
  8. vanole

    vanole Senior Member

    Re: Duo-Therm furnace/AC problem

    Len,

    I PM'd you the gents info. Did not want to hang his contact info out their for any spammer to get a hold of.

    V/R
    Jeff
     
  9. LEN

    LEN Senior Member

    Re: Duo-Therm furnace/AC problem

    Thanks vanole
    I did get a hold of William with a couple E-mails and was talking on the phone with him, he walked me though a couple test and decided it was the Stat and is sending one to the next destination. Boy learned a lot from several tech's on the phone and William, think I'll take this tech thing up for xtra cash LOL!!

    thanks all

    LEN
     
  10. vanole

    vanole Senior Member

    Re: Duo-Therm furnace/AC problem

    I think William is top shelf. He walked me thru the drill. Wait to you see when you get it how he makes it so easy to send the carcass back. Really professional.

    Jeff
     

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