Genuine Brand New THERMISTOR, ASM PACKAGE for Refrigerator models: 400/400-2 Series, 600/600-2 Series, 700-2 Series Tall, 700-3 Series, WS-30, 736TR, 736TC/I MODELS 736TR/TC/IUse Prior to Serial #2970000 Except Between #2953454 and #2953517 and Except Between #2955770 and #2955775. 427/427R Use Prior to Serial #3172246 424 Use Prior to Serial #3100478 700BC/I-3 Use Prior to Serial 3191157 700BF/1-3 Use Prior to Serial #3191730 700BR-3 Use Prior to Serial #3191472 700TC/I-3 Use Prior to Serial #3311536 700TF/I-3 Use Prior to Serial 3313915 700TR/-3 Use Prior to Serial #3313355 WS-30 Use Prior to Serial #3521952 Once you click on buy it now, tell me the model number and serial number of your REFRIGERATOR to confirm you receive the right order. THERMISTOR won't be shipped out without provision of this important information. THIS IS A GENUINE REPLACEMENT PART. PLEASE BE SURE THE PART YOU ARE ORDERING IS COMPATIBLE AND DOES WORK WITH YOUR APPLIANCE. Please allow 3 business days for shipping.