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46
Refrigerator Service Manual
NX6 / NX8 / NXA Models
When poor or no cooling in AUTO AC or AC-Manual Mode, is
present:
1. Measure AC voltage input to the power board.
2. Measure heater amp draw.
3. If amp draw is not as speci
fi
ed, measure the heater's
resistance at ambient temperature.
When replacing an AC heater make sure the stop bead rests
fully against heater tube rim. See Fig. 32.
AC Heater Circuit Fuse
The AC circuit fuse is a fast acting 8-amp
1
/
4
" x 1
1
/
4
" AGC type.
It is on the power board, labeled F2.
The AC heater, is a cartridge type heater. NX series refrigerators
have a heater for rated 300 Watts (2.5 amps at 120 VAC) with a
heater resistance of 46 to 51 ohms.
AC Power Requirements
AUTO AC and AC-Manual Mode operation requires 108 to 132
VAC. AC power must be supplied through a 2 pole/3 wire/20
amp grounding type receptacle.
AC Heater
Fig. 30 - AC and DC Heaters (3-way refrigerator)
Fig. 31 - Lamp/Thermistor Assembly.
Fig. 32 - AC Heater.
Stop Bead
Black Wire Leads
Connector
Light bracket
Lightbulb
Light cover
NX61 / NX81,
NX64 / NX84
NXA64 / NXA84
Thermistor
Clip
Electrical Requirements and Components - cont’d.
!
WARNING
Electric shock hazard! The refrigerator is fed power
from more than one source. Unplug the AC cord from
the RV AC receptacle before servicing electrical or
electronic components.
!
WARNING
Do not wire the heater(s) direct!
Wiring heater(s)
direct bypasses control safety devices and creates
the potential for an electrical
fi
re.
Canister Door
DC Heater Tube
AC Heater Tube
AC Heater
DC Heater
