Description
Product Overview
The 618548 RV Refrigerator Thermistor Assembly is a direct-fit replacement temperature sensor for Norcold RV absorption refrigerators. This thermistor monitors internal temperature and sends data to the control board. When it fails, your refrigerator may run too cold or too warm. This assembly includes the thermistor probe, waterproof housing, and pre-attached wire harness for a simple 10-minute DIY repair.
Compatibility
| Model Series |
Compatible Models |
| N6 Series |
N610, N611, N621, N622, N641, N642 |
| N8 Series |
N811, N821, N822, N841, N842, N843 |
| NX Series |
NX611, NX641, NX811, NX841, NXA641, NXA841 |
| Norcold Legacy |
962, 963, 9162, 9163, 9182, 9183, 2117, 2118 |
Specifications
| Spec |
Detail |
| Part Numbers |
618548, 621742 |
| Material |
High-Temp Resistant Thermistor + Waterproof Housing |
| Wire Harness |
Included — Pre-Attached |
| Installation Time |
~10 Minutes |
Key Features
-
Wide Compatibility: Covers virtually all Norcold N6, N8, and NX series RV refrigerators.
-
Waterproof Construction: Sealed housing protects from moisture inside the refrigerator compartment.
-
High-Temp Rated: Engineered for absorption cooling temperature fluctuations without signal drift.
-
Pre-Wired Harness: Plug-and-play installation — no splicing or soldering required.
Installation
- Turn off refrigerator and disconnect power (120V and 12V/LP).
- Locate thermistor clipped to cooling fins inside the compartment.
- Follow wire to control board, unplug old thermistor.
- Clip new 618548 thermistor onto same fin position.
- Route wire harness, plug into control board, restore power.
Why Choose iFJF
A faulty thermistor is the #1 cause of RV refrigerator temperature issues — costing $150-300 at an RV service center. Our 618548 assembly lets you fix it yourself in 10 minutes. Every unit is tested for resistance accuracy before shipping.
Frequently Asked Questions
Q: How do I know if my thermistor is bad?
A: Refrigerator running constantly (freezing), not cooling enough, or temperature fluctuating wildly.
Q: Will this fit my Norcold N841?
A: Yes. Compatible with all Norcold N6, N8, and NX series including N841.
Q: Where does the thermistor clip?
A: Clips onto metal cooling fins inside the fridge. Position per owner's manual (typically 2nd or 3rd fin from right).
Q: Do I need special tools?
A: No special tools needed — clips on and plugs in.
