Question about Dometic Rooftop RV Air Conditioner
My Duo Therm Thermostat 3105356.001 does not work anymore. What can I use as a Thermostat to replace it?
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Posted on Jan 02, 2017
SOURCE: 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)
Posted on Jun 17, 2008
SOURCE: Duo Therm Thermostat
I think this is a setting on your air conditioner, the air conditioner will turn off when the room is at the correct temperature and when the room starts to warm up, the air conditioner will turn back on. (You need to find the settings and change them from auto-adjust to manual-adjust)
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Posted on Jun 27, 2008
a. Remove the cover of the thermostat.
b. Connect the RED wire from the air conditioner
to the RC terminal on the thermostat.
c. Connect the YELLOW wire from the air conditioner
to the Y terminal on the thermostat.
d. Connect the BLUE wire from the air conditioner
to the H terminal on the thermostat.
e. Connect the ORANGE wire from the air conditioner
to the G terminal on the thermostat.
f. Push the thermostat wires into hole in wall and
fill excess hole with insulation.
g. Mount thermostat base to the wall with screws
h. Check all thermostat wires on base to ensure
they are completely clear of the bimetal coil of
the thermostat. Adjust if necessary.
i. Replace thermostat cover.
If nothing operates on the air conditioner, remove the
return air grille assembly and verify the red, orange, yellow
and blue wires are properly connected (red-to-red,
Next, disconnect the red wires and check for 12 volt
DC between the red wire from roof section and the orange
or blue wire from roof section. If no voltage received,
refer to Section F2. If voltage is received, the
problem lies with the thermostat or thermostat wires.
Next, disconnect all 4 wires (red, orange, yellow and
blue) from the thermostat. With the thermostat set on
COOL mode, FAN mode set on AUTO and HIGH, and
temperature selector set lower than the room temperature. Check for continuity between terminal RC (red wire)
and terminal G (orange wire); and RC (red wire) and
terminal H (blue wire). If continuity is achieved on each,
proceed with the next step.
Set fan switch to LOW. Continuity should NOT be present
between terminal RC and Terminal H, but present between
the other terminals (Y & G) and terminal RC.
If all of the previous checks are good, the thermostat is
good, do not replace it. If any one of the previous checks
are not correct, replace the thermostat.
Posted on Jun 29, 2009
red wire to the r section of the thermostat white (heat) to the w marked on thermostat Green (fan) to the g marked on thermostat yellow (a/c compressor) to the y marked on thermostat. Blue to the c marked on thermostat. Orange to the orange marked on thermostat.
Posted on Oct 30, 2009
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