Question about Dometic Rooftop RV Air Conditioner

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Duo therm runs cools clicking

Unit starts ok cools good, fan works good, unit starts clicking i changed the control box, changed the thermostat still clicks

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  • Ken Miller Mar 07, 2012

    The problem was the remote sensor trying to change the fan speed. Replaced sensor no more clicking.

  • XXXREX
    XXXREX Mar 08, 2012

    What do you mean ,"control box" specifically? "There is no control box"having just ooked at the website for Duotherm to see what you had specifically, heat pump, or if they had a strip only model. I see you included no model # as wel, so thet "box"
    I am assuming meant the 2 switches .OFF,LO,MED HI,COOL, HEAT, MODE,
    and the WARMER-COLDER, types for the manually controlled units with no remotely mounted thermostat, as in a home thermostat and not a WARMER-COLDER dial, I have the remote thermostat dou therm in my rv, it has a circuit board, is that what "control box" is? The thermostat is the same universal red white yellow green and common as all others, That inability to troubleshoot a thermostat yet be confident enough to diagnose and replace the "box" is incongruent, as is the "remote sensor" "trying" to change the fan speeds?? No such animal exists nor is that any normal sequence of operation regardless of the model #.
    The assertion doesnt exactly inspire integrity in my ears, theres too many vague incongruencies, and factual errors to be taken seriously at this juncture. I apologize if I aam corrected by a specific qualificationIE actual parts names/#, model#, actual description of components and the actual symptoms that coincide with the normal sequences of operation. I look forward to the actual specifics of what actually happened.

    control box, ? What do you mean specifically

    changed the thermostat still clicks

  • KD Grayson Heating,Air conditioning & Refrigeration

    ridiculous.

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  • Expert
  • 499 Answers

Sounds like a reversing valve solenoid.

Posted on Feb 25, 2012

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SOURCE: fan will not come on

maybe the capacitor for fan was already busted try to check that.

Posted on May 17, 2009

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SOURCE: thermostat wiring for second ac unit

I replaced one unite with another and the wires are differance colors the old unites wires are red,purple,yellow,bleck and white the new one have orange,brown,cream,darkpurple,and white

Posted on Aug 02, 2008

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SOURCE: I have a dometic duo-therm. No air coming through ducts.

I have a new Montana Mountaineer with a Dometic Duo Therm as well and experience something similar.

It appears that there are two options:
1. Open the vents in the unit and all the cold air will blow out of the AC as that would be the shortest path and the there is hardly any air coming out of the ducts.
2. Close the vents in the unit and it will force all the air through the ducts.

We let the air blow straight out of the unit during the day and then force it through the ducts at night to force it in the bedrooms. You could also open the vents in the unit part ways to get a combination.

I didn't figure it out immediatly either, but just look close at the unit and you can see that you can close the vents on the unit itself

Posted on Apr 20, 2009

22yooper
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SOURCE: duo-therm quick cool

Your compressor is trying to restart after it shuts off which is causing a power draw down changing the sound of the fan speed change. Check voltage power supply and insure that the power supply cord is heavy enough to carry the necessary load.

Posted on Jun 28, 2008

  • 1 Answer

SOURCE: Duo-Therm air conditioner/thermostat problems

The solution was to purchase and install a new thermostat. Works perfectly now.

Posted on Jun 02, 2009

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