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Programmable Thermostat = Much Higher Bill?

We installed a Honeywell programmable thermostat back in November and our december gas bill came in about 40% HIGHER. We have a Ruud Achiever 90 Plus powered by gas.

the temp is programmed to be 72 when we are here and 67 at night and when we are not home. Everything seems to be working ok. Any thoughts?

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  • 6 more comments 
  • mconn1 Jan 05, 2009

    It was a honeywell, not sure the model but it has the ability to program temp by time and day of the week. I consider myself somewhat handy and am pretty confident it is installed correctly. Labeled and matched all the wires to connectors on the install.

    Everything seems to be working fine... house gets warm in the mornings and evenings then cool during the day and at night.


  • mconn1 Jan 05, 2009

    it was a honeywell... brand new from Lowes and it appears to be working perfectly. I think the model number is rth6300b.

  • mconn1 Jan 05, 2009

    rdrennan, thanks... that was one of my thoughts... so I today turned down the temps and will wait and see if it makes a difference in the coming months. My wife believes that the temp should be set the same for night and day and didn't like the programmable idea to begin with... is this unit a heat pump and therefore set at one constant temp?

    dwcool, yes, I still have the paperwork.


  • mconn1 Jan 05, 2009

    dwcool...

    System type 1, setting 0 (heating and cooling : gas, oil or electric heating with central air). So, it is not set for a heat pump so changeover valve number is not an option unless I change the system type,.

    I believe I had it originally set for a heat pump but it blew out mighty cold air.




  • mconn1 Jan 05, 2009

    honeywell rth6300b

    current settings

    1 0
    3 0
    5 5
    14 0


  • mconn1 Jan 05, 2009

    yep, I have the red wire in red and there is a metal jumper from r to rc

  • mconn1 Jan 05, 2009

    Thanks for the help!

  • dwkcool May 11, 2010

    what kind off t-stat did you install

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You say your bill increased by as much as 40%. You must understand, this has been a much colder winter than usual as well. Not to mention, if your unit has not been properly serviced to the proper temprature rise anually you will be wasting gas everytime it operates. On over 90% of installed units they are operating over their designed temperature rise and wasting fuel and money for the end consumer. This is why it is very inportant to have you equipment service twice a year, beginibg of winter for the heater and begining of summer for the AC. But, more inportantly, it must be done PROPERLY...

Call me and I will explain the procedure...

Richard (Rick) Drennan
Global HVAC Distributors
Ruud Field Support Representative / Instructor
rdrennan@globalhvac.com
900 Spreckels Ave
Manteca, Ca. 95336
Office (877)448-7263
Cell (209)456-0513

Posted on Jan 05, 2009

  • 2 more comments 
  • RDrennan Jan 05, 2009

    AAAAHHH... A heat Pump... There is a big difference.... as the outdoor temperature drops the efficience of a heat pump decreases dramaticly. If you have a secondary electric heat strip bessure that it is wired into the "W@" terminal of the thermostat. This is another reason it is extreamly critical that the refrigerant charge be correct. If it is undercharged it will not properly heat the occupied space. If it is overcharged it it will cylcle off to soon and will not properly heat the space. In both instances it will cost substancially more to operate. Have your unit serviced. If your unit is a 12 seer or greater inform the technician specificly to charge your unit to 13 degrees SUBCOOLING, (NO MORE). any thing more will cause you problems and cost you money anything less then 10 degrees will cost you money and not properly heat. And clean the condser coil with a mild cleaner like Simple Green to assit the heat transfer...



    Best of luck..

  • RDrennan Jan 05, 2009

    No a 90 plus achiever is not a Heat Pump... but if you have a T-stat configured for heat Pump its not going to bring the furnace on. It will only bring the AC on... What is the make and model of the Thermostat you have and I will give you the configuration you need for your application...



    Richard (Rick) Drennan
    Global HVAC Distributors
    RUUD Field Support Representative / Instructor
    rdrennan@globalhvac.com
    900 Spreckels Ave
    Manteca, Ca. 95336
    Office (877)448-7263

  • RDrennan Jan 05, 2009

    1 0
    2 n/a
    3 0
    5 5
    14 0

    Jumper between R and RC

    Richard (Rick) Drennan
    Global HVAC Distributors
    Ruud Field Support Representative / Instructor
    rdrennan@globalhvac.com
    900 Spreckels Ave
    Manteca, Ca. 95336
    Office (877)448-7263
    Cell (209)456-0513

  • RDrennan Jan 05, 2009

    Then the configuration is correct so all falls back to proper service and temperature rise adjustment. If the unit is sized properly for the space per load calcs and adjusted per the temp rise and not over or under firing, which in over 90% of equipment they are, you are fine. I would recommend a PROPER temp rise service adjustemnt be done. The may call me if they are unsure on how this is done properly.

    Richard (Rick) Drennan
    Global HVAC Distributors
    Ruud Field Support Representative / Instructor
    rdrennan@globalhvac.com
    900 Spreckels Ave
    Manteca, Ca. 95336
    Office (877)448-7263
    Cell (209)456-0513

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Do you still have your program sheet

Posted on Jan 05, 2009

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  • dwkcool Jan 05, 2009

    do you still have the program papers for the t-stat install

  • dwkcool Jan 05, 2009

    when you go through the setup what is the changeover valve number set at and what do you have # 9 Stage 1 compressor set at

  • dwkcool Jan 05, 2009

    with this being a gas system you might want to have you gas pressure checked at the gas valve in the unit

  • dwkcool Jan 05, 2009

    sound like settings are ok

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