Hisense Technical Service Pointer

Service Pointer Details

Title: Ice Maker Water Tube Frozen

Creation Date: June 3, 2022

Revision Date: August 11, 2022

Service Pointer Number: HRQ-03-06-2022

Symptom: Ice Maker Water Tube Frozen

Models: HRQ215N6BVD, HRQ215N6BWD

Issue

Some units may experience an issue where the ice maker water line freezes up causing the unit to not produce ice. If the liner of the freezer section is not deformed from the ice buildup, continue with the steps with this bulletin. If the liner is deformed please contact Hisense Technical Support and attach date stamped pictures of the Model/Serial tag and the deformed area to the service ticket.

Serial Number Range

Description of Hisense serial number tag: shows 'Serial no:' followed by a number, 'SPECIFICATIONS', 'DESIGN PRESSURE', and fields for 'Line', 'Year', 'Month', 'Day', and 'Production Number'.

Repair: See Steps Below

1. Power off the unit.
2. Power the unit back on.
3. Within 10 minutes of powering on, press and hold the TEMP and MODE buttons simultaneously for 3 seconds to force the water to fill. Observe if the unit is frozen or if water is flowing. (Icons: Temperature display with °F/°C toggle, 'Hold 3s' indicator, 'Super Cool' icon, 'Energy Saving' icon, 'MODE' icon)
4. Unplug the unit and remove the 2 screws holding the icemaker in place. Disconnect the wires to the ice maker and the temperature sensor. (Description of icemaker removal: shows the icemaker unit with two circled screw locations, and a separate image of wires being disconnected from a temperature sensor.)
5. Once the ice maker is removed, verify the extent of the ice blockage in the water fill area. If there is ice blocking the water fill area, use a steamer to remove the ice buildup (be careful to not damage the inner tank and water route). (Description of ice blockage in the water fill area: shows the internal freezer compartment where the ice maker is located, with ice buildup visible in the water fill path, highlighted by a red circle.)
6. Reinstall the ice maker and test to see if water flows easily through the water fill area using the test in STEP 3.
7. Remove the 3 screws for the cover of the control board on the rear of the unit, remove the cover and replace the control board. (Description of control board access: shows the rear panel of the appliance with three circled screw locations for the control board cover, and a separate image of the main electronic control board (PCB) removed from its housing.)
8. Next, install the adapter board for the fill tube heater in the upper right corner of the PCB area, and ensure the board is firmly installed. (Description of adapter board installation: shows the main PCB with the adapter board connected to the upper right corner, with a red circle highlighting the connection point.)
9. Unplug CONNECTOR 1 of the main board and undo the tape around the wires. (Description of wire preparation: shows the main control board with CONNECTOR 1 identified and wires being untaped.)
10. Plug CONNECTOR 1 into the CONNECTOR 3 connection on the adapter board. Untwist remaining wires to form two strands. (Description of CONNECTOR 1 connection: shows CONNECTOR 1 from the main board being plugged into CONNECTOR 3 on the adapter board.)
11. Install the CONNECTOR 2 of the adapter board into the CONNECTOR 1 SOCKET on the main control board. (Description of CONNECTOR 2 connection: shows CONNECTOR 2 from the adapter board being plugged into CONNECTOR 1 SOCKET on the main control board.)
12. Remove CONNECTION A on the inverter board and plug into CONNECTOR SOCKET C on the adapter board. (Description of CONNECTION A and CONNECTOR SOCKET C connection: shows two images, one highlighting CONNECTION A on the inverter board and the other highlighting CONNECTOR SOCKET C on the adapter board, indicating the connection point.)
13. Plug CONNECTION B of the adapter board into CONNECTOR A SOCKET on the inverter board. (Description of CONNECTION B connection: shows CONNECTION B of the adapter board being plugged into CONNECTOR A SOCKET on the inverter board.)
14. Arrange wires accordingly to be sure both the wires and connections remain secure. Verify all connections are secure. (Description of wire management: shows the assembled wiring and boards with connections secured.)
15. Verify that the power output on the adapter board is correct by powering on the unit and using a multimeter (set to DC voltage) to measure the pins on CN4 of the adapter board. The DC voltage range should be within the range of 14.7Vdc ~15.3Vdc. (Description of adapter board and CN4 connector: shows a diagram of the adapter board layout and an enlarged view of the CN4 connector area, detailing pins like GND, +25V, FOR TEST, and indicating the required DC voltage range of 14.7Vdc ~15.3Vdc.)
16. Pull the waterline connection from the holder. Depress the fitting to remove the water line and pull line. From the end of the water line measure 30 mm and cut the water line. Reattach the line to the connector and reinsert the connector to the holder. (Description of waterline modification: shows a sequence of four images illustrating the process of disconnecting the water line, measuring 30mm from the end, cutting the line, and reattaching it to the connector.)