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Thetford N504.3 - User Manual

Thetford N504.3
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Thetford Customer Support
Telephone: (61) 03-9358-0700
Fax: (61) 03-9357-7060
Web Site: www.thetford.com.au
WARNING: Improper installation, adjustment, alteration, service or
maintenance can cause personal injury or property damage. Refer to
this manual. For assistance or additional information, contact a qualied
installer, service agency, or the gas supplier.
FOR YOUR SAFETY
Do not store or use gasoline or other ammable vapors and liquid in the
vicinity of this or any other appliance.
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Don’t touch electrical switches.
3. Extinguish any open ame.
4. Immediately call your gas supplier.
Part No. 634034B (04/08/2011)
Installation and Owners Manual
For Australian refrigerator models:
N304.3 (93 liter 3-way operation with propane gas, 240 volts AC, or 12 volts DC )
N404.3 (128 liter 3-way operation with propane gas, 240 volts AC, or 12 volts DC )
N504.3 (164 liter 3-way operation with propane gas, 240 volts AC, or 12 volts DC )
WARNING: DO NOT install this refrigerator in below deck marine applications. Do not install this refrigerator in xed
indoor cabin or other dwelling applications. This refrigerator must use only Thetford designed and approved outside
air intake and exhaust ventilation for correct and safe operation. Any other ventilation could cause lethal combustion
exhaust fumes and/or explosive propane gas fumes to be in the living area and/or to be below deck.
Thetford Australia
41 Lara Way
Campbelleld, VIC 3061
!
!

Questions and Answers

  • L
    lisawilsonAug 8, 2025
    What to do if Thetford Refrigerator does not cool correctly?
    • J
      Jonathan WashingtonAug 8, 2025
      If your Thetford Refrigerator isn't cooling correctly on AC, DC, or propane gas, make sure the refrigerator vents are unobstructed and remove any obstructions. Also, ensure that the vehicle is level within 3° from side-to-side and 6° from front-to-back.
  • G
    gavingloverAug 14, 2025
    Why Thetford N504.3 won't work on propane gas?
    • F
      fmullinsAug 15, 2025
      If your Thetford Refrigerator isn't operating on propane gas, check that the propane gas supply line is purged, the propane gas tank(s) is not empty, and the valve of the propane gas tank(s) is open. Also, confirm that the propane gas is at the correct pressure and that the manual shut off valve of the refrigerator is open.
  • A
    Alicia DunnAug 20, 2025
    How to prevent frost build-up in Thetford N504.3?
    • J
      Justin CarneyAug 20, 2025
      To prevent excessive frost in your Thetford Refrigerator's freezer or on the fins, verify that all food storage containers are sealed and that you only open the refrigerator door when necessary. Also, check that the door gasket seals correctly, and ensure that the refrigerator and freezer are defrosted.
  • M
    Michael CannonAug 27, 2025
    What to do if Thetford N504.3 Refrigerator does not operate on AC?
    • S
      Steven HarrisonAug 27, 2025
      If your Thetford Refrigerator isn't operating on AC, ensure that it is plugged in and that the thermostat is turned to setting numbers 2-5, as setting number 1 is an OFF position in AC operation.
  • S
    Sandra HunterSep 1, 2025
    Why Thetford N504.3 won't work on DC power?
    • L
      lisa19Sep 1, 2025
      If your Thetford Refrigerator isn't operating on DC, check that the battery charging equipment of the vehicle is operational and that the AC/DC converter is operational (if applicable). Also, ensure that the DC connection to the refrigerator is tight.

Summary

Operating the Refrigerator Controls

Ignition - propane gas operation

Provides step-by-step instructions for igniting the refrigerator using propane gas.

DC Operation

Remove the Refrigerator

Reinstall the Refrigerator

Installation Manual

Ventilation Requirements

Assemble the Enclosure

Install the Lower and Upper Vents

Install the upper exhaust vent

Install the Refrigerator

Connect the Electrical Components

Connect the 240 volt AC supply

Guidelines for safely connecting the refrigerator to a 240V AC power source.

Connect the 12 volt DC supply (3-way models only)

Instructions for connecting the refrigerator to a 12V DC power source.

Connect the Propane Gas Components

Connect the propane gas supply system

Procedure for connecting the refrigerator to the propane gas supply.

Examine the gas supply system for leaks

Method for checking propane gas connections for leaks using detection solution.

Troubleshooting Refrigerator Problems

Thetford N504.3 Specifications

General IconGeneral
TypeAbsorption Refrigerator
Door ShapeFlat
Height821 mm
Depth543 mm
RefrigerantAmmonia
Climate ClassSN-T
Energy Source12/24 V DC, 230 V AC, or gas (butane/propane)

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