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Part 1 - General Information:
model N300.3 refrigerator in every trailer model. The “.3” suffix on the
model number indicates that it is capable of running on three different power sources: propane
(LPG), 12 VDC, or 110 VAC.
This is the Norcold N300.3 which
has 2.7 cubic foot interior volume.
Although you have 3-way power to choose from, each one has its intended purpose while
traveling.
1. The
AC Mode
of operation should be chosen when you have a shore power connection either
at home or at campsites that can provide 110 VAC power.
2. The
LP Mode
of operation should be chosen while the vehicle is stationary and there is no
source for continued 110 VAC operation. The amount of LP consumed by the refrigerator is
miniscule compared to the consumption by the furnace during cold weather. You should not use
LP operation while the vehicle is in motion because most local, state, and Federal regulations
prohibit its use, and usually the air currents generated by the motion usually prevent proper
heating action. Although some people report that they have been able to accomplish the feat.
3. The
DC Mode
is intended only for use while driving. While in this mode, the unit operates
without thermostatic control. For those willing to modify the internal wiring (and void any
existing warranty), there is a modification available which will allow for thermostatic control in
this mode.
When preparing for a trip, do NOT use the DC mode for the initial cool down of the refrigerator
but instead use either AC or propane. It should normally take at least three hours or more to cool
down the refrigerator BEFORE any food is placed into it.
Operator's Manuals for Norcold Model N300:
(632k)
Service Bulletin - Checking for problems in LP mode
