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Heat stays on no matter what the therm temp is set on any ideas

I INSTALLED A NEW THERMASTAT AND THE PROBLEM IS THE SAME . AS SOON AS I TURN THE HEAT SWITCH ON AND GO DOWN TO THE UNITTHF FAN COMES ON AND THE GAS STARTS AND THT UNIT RUN TILL I TURN OFF THE SWITCH ON THE THERM I NEED THE DRAWING 09-24212-01 REV 06

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  • carl carpenter
    carl carpenter May 11, 2010

    is this a digital programable or non-programable t-stat.when you say fan, some units have an iduced draft motor that comed on first.

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If the stat has an installer set up did you configure it for your specific system type? (heat pump,fossle fule,and fan control

Posted on Jan 11, 2009

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I have a Dometic 15K roof Ac on my FW. After the AC reaches therm temp, the compressor and the fan turn off, but the fan starts right back up again and runs until you set the thermostat on off.


That is normal operation, only the compressor cycles, the fan stays running to keep air circulating for better temp control. Otherwise the rear of the space could get 5 degrees warmer than the front

Feb 23, 2015 | Dometic 459516 459516.XX1C0 Brisk Air...

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Installed new LG 18000 btu mini split heat pump, started it in heating mode, the unit first appears to run fine but continues to cycle in and off without reaching temp. have already changed indoor board...


a heat pump is a finely tuned machine that can be very efficient yet very frustrating at times. I could give you better advice if I were looking at the unit but hear are some things that may help. The unit has a defrost mode that cycles every 30,60,or 90 minutes. If you take the cover off of the condensing unit and near the top you will see the adjustor. unless you live in arctic or very humid cilimates, it should not be set to 30 min. Also the unit may be low on refrigerant. you can check this with a thermometer. put the therm. on the hot gas line(big one) and it should be 110 degrees hotter than the outside temp. Insulate the point of contact around the therm. and gas line. Also, your aux. heat may not be coming on to supplement the heat from the pump. i.e. the fusable link could have burned up and the heating element wouldnt be coming on(elec. models). there are too many variables and combinations of problems that could cause this.

Dec 24, 2009 | Air Conditioners

1 Answer

Crazy Heat


I think that I would change out the thermostat only due to the symptoms you are describing. Think the control board may be fine however, the thermostat sounds as if the internal componants are going out. Good luck on your repairs

Dave

Sep 22, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Can not get temp below 77


Is the thermostat set up for automatic change over from heat to cool? If so, the heat is probably set for 75, you will need to lower the heat setting in order to Lower the cooling. the stat won't let these settings with in 2 degrees of each other so the heating and cooling don't fight each other.

Aug 25, 2009 | Air Conditioners

2 Answers

Central heat/air unit for home blows cold air


could just be heat trapped in ductwork for attic temp or from not running for more than a few hours.

Jan 13, 2009 | Haier HC48C1VAR Central Air Conditioner

1 Answer

Dur-therm furnace heat controll with Dometic remote


i would suggest that you look at your thermostat,it may be to close to the furnace keeping in mind that all thermostats have a certain tempreture drop (or gain) before restarting john

Dec 28, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

Ruud air to air heatpump intertherm propane furnace honeywell th5220d non programable thermostate.fan on furnace will not turn off in aux.mode even though the furnace heat kicks on and off. thank you for...


Make sure fan relay is wired correctly (G) wire. Ensure the fan on therm is not on, it should be on Auto or off.

If your furnace is short cycling because it has to keep heating your home, the delay in the control board may be staying on to compensate for the exchangers getting hot. If it heats normally, then put your attention to your thermostat.

Set the heating system on aux heat only. Fan should not be on, if it does stay on after a heating cycle, see if the furnace is heating normally, and reaching temp as desired before the heat comes off. Then check the therm wiring, pull the face of the therm, disconnect green wire (fan) and try the heating again.

Dec 06, 2008 | Intertherm Air Conditioners

1 Answer

Will not shut off


Sounds like a stuck relay on the unit itself. Maybe there is a short in the control wire that comes from the thermostat that activates the fan.

The thermostat probably has one hot wire at all times. The thermostat then chooses which wire to send the voltage down based on your selection. One of those wires is probably for the fan only. Make sure that it is in good condition (no bare, pinched or wires)

Jun 03, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

Problem with RSKP 0006 control board


If the unit has an outdoor thermostat, this turns the aux. heat on very cold days. It may need to be replaced, or removed completely, if its kicking over to soon before it gets that cold. If its set to turn on the electric at 30 degrees, then its working the right way. Also, look for different temp. setting on the board you lust installed, there should be some sort of adjustment options on it. Especially if there is no thermostat outside.

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