When your Norcold refrigerator loses power on AC or DC -- or refuses to switch between modes -- the power supply board is usually the first component to suspect. The 39-1559 is the current OEM-replacement board used in the majority of Norcold 2-way absorption refrigerators produced after 2006, covering a wide range of N-series and NX-series models. Drop-in replacement design means no harness modifications in most applications.
Norcold absorption refrigerators rely on the power supply board to manage incoming AC (120V shore power) and DC (12V battery) voltage, regulate the heating element circuit, and protect the unit from over-temperature and electrical fault conditions. When this board fails, symptoms typically include the refrigerator not powering on, error codes on the control panel, loss of one power mode, or blown fuses that keep returning.
Part number 39-1559 (also cross-referenced as 628661 in some Norcold parts catalogs) replaced earlier revisions and became the standard production board across a broad family of N-series units. If your refrigerator was manufactured after 2006 and is a 2-way (AC/DC) model in one of the compatible series listed below, this is very likely the correct replacement.
Covers N41X, N51X, N6XX, N8XX, NX, NXA, N1095, 1200, 1210, 1211, and 2117 series Norcold refrigerators built after 2006.
Manufactured to the same specification as the original board -- same connector positions, same mounting footprint, no harness rewiring required in most applications.
Controls both 120V AC (shore power or generator) and 12V DC (battery) circuits, allowing the refrigerator to operate on either source.
Backed by a limited 90-day manufacturer warranty against defects in materials and workmanship.
The power supply board is typically located behind the lower exterior access panel of the refrigerator on the outside of the RV. Disconnect shore power and 12V battery power before beginning. The board is secured with small Phillips screws and connects to the refrigerator's wiring harness via keyed multi-pin connectors. Most DIY-capable RV owners can complete this replacement in under an hour with basic hand tools. Restore power only after all connectors are fully seated and the access panel is re-secured.