Norcold Cooling Unit 693299 | replaces the Norcold 639570 for N8V/ N8X/ N8LX/ N10LX/ N10LXIM/ NA10LX/ NA10LXIM Polar Series Norcold Refrigerators 

This is the Norcold Cooling Unit for all N8/ NA8/ N10/ and N10 models regardless of serial number. The old part number was 639570. All cooling units come with thermal mastic to seal the new unit to the back of your refrigerator box. It works with the following Norcold models:

• N8V
• N8X
• N8LX
• N10LX
• N10LXIM
• NA10LX
• NA10LXIM

Troubleshooting

Cooling units fail for one reason: prolonged overheating of the cooling unit. This typically happens from being parked off-level. Since the cooling unit is a gravity operated system, it requires you to be within 3 degrees of perfectly level from side to side, and 5 degrees front to back. Overheating of the ammonia solution breaks down the anti-corrosive additives and you'll either be dealing with a floating blockage in the cooling unit or a rupture. 

• Physical signs of failure:
• Yellowish powder/ dust beneath the cooling unit
• Smell of ammonia
• Signs of internal failure:
• No cooling detected when operating on either mode.
• Usually a sign of a floating blockage inside the cooling unit that is preventing the flow of ammonia.

Installation

Time:

• 3-5 hours

Tools Needed:

• Screwdriver
• Putty Knife
• Thermal mastic (included with cooling unit)
• Ammonia or mineral spirits

Steps:

• Unmount the refrigerator from back mounting plate and front frame (if one exists).
• Shut off and disconnect propane.
• Disconnect the power board from AC power and DC connections.
• Rock the refrigerator into the coach.
• Inside freezer compartment, you'll need to remove the evaporator screws from the back plate (usually 8 of them).
• Lay refrigerator face down on the floor on blankets.
• Remove remaining screws from the back side of the cooling unit and remove cooling unit from refrigerator box.
• With a putty knife, scrape off old thermal mastic until you have a clean surface.
• Clean that surface with ammonia or mineral spirits.
• Bead on new thermal mastic, using all mastic in the tubes provided.
• Screws the cooling unit into place.
• Reverse previous steps and reinstall refrigerator.

*Also note that this is a non-returnable part. MAKE SURE that the cooling unit is defective before ordering.