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49-5000406 Rev. 5 15
Troubleshooting Tips... Before you call for service
Save time and money! Review the charts on the following pages first and you may not need to call for service.
Problem Possible Cause What To Do
Air Conditioner
does not operate
An RV fuse has blown, or circuit
breaker has tripped.
Replace the fuse or reset the circuit breaker. If the problem
continues, call an electrician. See “Electrical Requirements.”
The mode setting is in the OFF
position.
Press POWER or turn the Mode control to an active setting.
The local power has failed. Wait for power to be restored.
Air conditioner
blows fuses
or trips circuit
breakers
Too many appliances are being used
on the same circuit.
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Time-delay fuse or circuit breaker of
the wrong capacity is being used.
Replace with a time-delay fuse or circuit breaker of the
correct capacity. See “Electrical Requirements.”
You are trying to restart the air
conditioner too soon after turning off
the air conditioner.
Wait at least 3 minutes after turning off the air conditioner
before trying to restart the air conditioner.
Air conditioner
seems to run too
much
The air conditioner is in a heavily
occupied room, or heat-producing
appliances are in use in the room.
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to use heat producing appliances during the hottest part of
the day. A higher capacity air conditioner may be required
depending on the size of the room being cooled.
Air conditioner
cycles on and off
too much or does
not cool room in
cooling mode
The air conditioner is not properly
sized for your RV.
Check the cooling capabilities of your RV air conditioner.
The filter is dirty or obstructed by
debris.
Clean the filter.
There is excessive heat or moisture
(open container cooking, showers,
etc.) in the room.
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to use heat-producing appliances during the hottest part of
the day.
The louvers or ducts are closed. Make sure louvers are open.
The outside temperature is below
60°F (15°C).
Do not try to operate your air conditioner in the cooling mode
when the outside temperature is below 60°F (15°C).
The temperature of the room you are
trying to cool is extremely hot.
Allow extra time for the air conditioner to cool off a very hot
room.
Windows or doors to the outside are
open.
Close all windows and doors.
The Temperature control is not at a
cool enough setting.
Adjust the TEMP control to a cooler setting by pressing the
minus button to reduce the temperature. Set the Fan Speed
control to the highest setting.
Wall thermostat improperly installed Verify proper installation of Wall Thermostat per installation
instructions (pg. 5 …not on exterior wall or in direct
sunlight… …in an area affected by a vent or duct…)
Water drips from
cabinet into your
house
The indoor coil may be frozen. De-ice by running the fan only until clear.
The air conditioner’s mounting gasket
may not be sealed against the roof.
Check mounting bolts and tighten to 45 ± 5 in-lbs if
necessary.
TROUBLESHOOTING
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