Part Replacement; Selector Switch; Thermostat; Ac Heater - Norcold N300 Service Manual

Part Replacement

If the "Troubleshooting Charts" tell you to replace a part, use
the following instructions.

Selector switch

1. Close the valve of the propane gas tank(s).
2. Pull the knob off the selector switch.
3. Remove the two screws that attach the selector switch.
4. Gently pull the selector switch away from the back of the
control panel.
5. Remove each wire, one at a time, from the selector switch
and install in exactly the same location on the replacement
selector switch. (See Art01020 and Art01021)
6. To install the replacement selector switch, do steps 1-4 in
reverse.

Thermostat

1. Close the valve of the propane gas tank(s).
2. Pull the knob off the thermostat.
3. Remove the gas supply line from the inlet flare fitting of the
thermostat.
4. Remove the safety valve from the thermostat. (See page 12)
5. Remove the two screws that attach the thermostat to the
bracket.
6. Remove the two red wires from the thermostat.
7. Remove the clips that attach the capillary tube to the
cooling fin inside the refrigerator.
NOTE: The capillary tube is located on the fifth cooling fin
from the right.
8. Gently pull the capillary tube through the back of the
refrigerator cabinet.
9. To install the replacement thermostat, do steps 1-8 in
reverse.
- Make sure the capillary tube is flat against the cooling fin
10. Examine all the gas connections for leaks.

AC heater

1. Remove the AC power cord from the receptacle.
2. To make sure the other energy sources do not activate,
turn the selector switch to the OFF (
3. Remove the two blue wires that connect the AC heater to
the terminal block.
4. Using a utility knife, vertically cut through the insulation
that surrounds the flue tube.
5. Remove the insulation.
6. Pull the AC heater up and out of the heater well.
7. Push the replacement AC heater down into the heater well.
8. Put the insulation around the flue tube.
9. Tape the insulation closed.
10. Attach the two blue wires of the AC heater to the terminal
11. Put the AC power cord in the receptacle.

DC heater (3-way models)

1. Remove the DC input leads from the refrigerator.
2. To make sure the other energy sources do not activate,
3. Remove the two yellow wires that connect the DC heater
4. Using a utility knife, vertically cut through the insulation
5. Remove the insulation.
6. Pull the DC heater up and out of the heater well.
7. Push the replacement DC heater down into the heater
8. Put the insulation around the flue tube.
9. Tape the insulation closed.
10. Attach the two yellow wires of the DC heater to the
11. Make sure that a 20 Amp fuse is in the fuse holder.
12. Attach the DC input leads from the refrigerator.
) position.
- Make sure the bead of weld on the AC heater touches the
top of the heater well.
- Make sure the insulation is completely around the flue
tube.
block.
- Put tape on the positive lead to prevent an accidental
electrical short and a blown fuse.
turn the selector switch to the OFF (
to the terminal block.
that surrounds the flue tube.
well.
- Make sure the bead of weld on the DC heater touches
the top of the heater well.
- Make sure the insulation is completely around the flue
tube.
terminal block.
) position.
Service Manual N300 Models - 11