Upper/lower door bins · OEM callout 7 · diagram p.2
636747 — Small door shelf / bin
Factory diagram callout 7 on the upper-right door; also used as a small door bin in other 2118 positions. Check model variant and original rail.
Norcold 2118 Refrigerator Exploded Parts Diagrams & OEM Numbers
Use this Norcold 2118-series numbered parts and exploded-diagram reference to identify actual refrigerator components from the manufacturer's 2025 parts list. It separates small and gallon door bins, interior storage, drip trays, the optical display board, the rear power board and cooling-area service parts. The 2117 series is different; do not transfer these numbers to a 2117 refrigerator without separate proof.
Original Norcold / Thetford numbered exploded drawings
These are actual manufacturer drawings from Norcold factory publication 637110 (February 6, 2025), covering 2118, 2118IM, 2118IMD, 2118BK and relevant stainless or black variants. The parts photos shown below correspond to exact manufacturer numbers in the published callout tables.
Door bin exploded drawings (p.2)Cabinet interior numbered drawing (p.6)Rear cooling-unit drawing and table (p.10)Rear electrical controls and boards (p.12)
The links open the manufacturer's illustrated PDF at the indicated page; the guide does not redraw or invent mechanical geometry. Some in-app PDF viewers open at page one instead of honouring a page fragment; use the printed page number if needed.
Which refrigerator area are you identifying?
Small door bins (636747) are separate from gallon-size lower door bins (636748). Verify the door position in the correct factory view.
Crisper 627866 and interior drip tray 618774 appear on the cabinet's inside exploded drawing. Wire shelves are separately numbered.
Rear drip cup 629490 and cooling fans are behind the refrigerator. A used rear bracket is not a fan assembly.
Optical display kit 637081 and rear power-board kit 637082 have different electrical functions and factory locations.
Numbered manufacturer parts with real catalog photographs
Lower door bins · OEM callout 8 · diagram p.4
636748 — Gallon-size door bin
Factory callout 8 on the lower-right door. A wider bottle/gallon bin, not the smaller 636747 shelf.
Interior cabinet · OEM callout 1 · diagram p.6
627866 — Clear crisper drawer
Factory interior exploded view callout 1, crisper drawer. It is not manufacturer part 636910, which the official list calls a beverage-can bin.
Interior cabinet · OEM callout 25 · diagram p.6
618774 — Interior condensation drip tray
Factory interior callout 25. Located inside the fresh-food cabinet; different from rear service-area drip cup 629490.
Rear cooling area · OEM callout 8 · diagram p.10
629490 — Rear cabinet drip cup
Factory rear-cooling drawing callout 8. Drain collection at the back of the cabinet; do not select interior 618774 instead.
Exterior control interface · OEM callout 15 · diagram p.9
637081 — Optical control / display kit
Thetford/Norcold lists 637081 as the replacement kit for optical control assembly 636751. The linked product is a used OEM listing; verify item condition and available functions.
Rear electrical controls · OEM callout 11 · diagram p.12
637082 — Refrigerator power board kit
Factory rear-control parts list callout 11. Different electrical board and function from the optical display kit 637081.
Cooling-fan bracket and burner-box cover
These also match manufacturer-numbered callouts, but the current product image is only a Norcold logo. They are linked transparently rather than represented by invented product photographs.
- 628747 — DC cooling-fan bracket (factory callout NS, p.10). View part.
- 637158 — Rear burner-box cover kit (factory callout 7, p.10). View part.
Parts to identify carefully before ordering
636910 — beverage-can bin (interior callout 4). Norcold identifies this as a beverage-can bin, not a middle crisper. Compare the shape and original part number before ordering.
636688 / 636689 / 636690 — wire shelves (interior callouts 8 / 7 / 9). These numbers identify refrigerator wire shelves. Check the shelf positions and individual pieces; a door-rack set is not a confirmed replacement.
Match the original cooling-fan number. Norcold’s 2118 diagram lists 628685 as the external cooling fan, 637154 as the upper fan kit, and 637283 as the replacement for 637088. Confirm any proposed 50803 replacement with Norcold using the refrigerator model and serial number.
Cooling-fan identification: read the OEM callout first
In the current rear cooling-unit diagram, callout 2 denotes the external fan position: 628685 is the listed high-velocity fan; older 636441 is marked use 628685; 637154 is the upper fan replacement kit. Separately, callout 11 identifies fan assembly 637088 and the listed 637283 replacement kit. Thermostat service kits 628278 and 640235 appear without an illustrated callout and are identified as limited-availability parts. This does not establish their suitability for any different Norcold model.
Choose the exact item and condition
The linked store catalog contains a mix of new and used components. A matching manufacturer number alone does not establish that a listing includes all mounting hardware or accessories. Verify the individual listing's condition, completeness and availability before purchasing. For an electronic board, check the refrigerator's full model, serial number and original part label; do not replace a safety device merely because the connector fits.
For the earlier Norcold 2117 model, including its different cooling-unit serial breaks and ice-maker part numbers, see the Norcold 2117 factory exploded-parts guide. Do not assume model-to-model interchangeability.
Related ventilation references
For the cabinet intake and exhaust outside the RV, see the Dometic and Norcold sidewall vent-size guide and the refrigerator roof cap and base guide. For vent insect screens and the broader fan-number holds, see the refrigerator screens and cooling-fan reference.
Service safety: A gas absorption refrigerator contains propane, combustion exhaust and mains/DC electrical components. Do not remove a burner assembly, rewire a fan or alter certified ventilation without the manufacturer's service procedure and qualified RV service assistance.
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