77119 Heater Relay Board for IQ2020 of Watkins Control Box 2001-2009, Includes Power Jumpers and Screws, Replaces 74618 73577

The 77119 Heater Relay Board for Hot Spring is a premium replacement part designed to restore and maintain the heating function of your IQ2020 control box used in spas from 2001 to mid-2009. This upgraded relay board replaces previous versions 74618 and 73577 with an improved design that enhances relay durability and heater connection efficiency. Equipped with power jumpers and shortened screws for secure installation to the IQ2020 front cover, this kit ensures your spa heater operates reliably for comfortable bathing temperatures. Easy to install and built for lasting performance, the 77119 relay board is the essential upgrade for spa owners seeking dependable heating control.

• Complete Installation Kit - Includes a new upgraded 77119 heater relay board, power jumpers, and shortened screws for secure installation on the front cover of the IQ2020 control box
• Upgraded Replacement Part - The 77119 heater relay board replaces part numbers 74618 (as of September 10, 2013) and 73357. This latest revision for the IQ2020 control box (2001–2009.5) features an improved design that reduces stress on the two reinforced relays by providing a more efficient connection for the heater power cord. The large gray terminal block connects the black heater wire to the H1 position, while a separate gray terminal block connects the white (neutral) wire, ensuring reliable and long-lasting heater performance
• How to Know If Replacement Is Needed - To check if your 77119 relay board needs replacing, first turn up the temperature and make sure the heater LED lights up. Next, check the H1 and H2—if there’s no power going to the heater, it’s time to replace the board. A flashing red D9 light also signals a failure. Additionally, if you see signs of damage on the front or back of the board, it definitely needs to be replaced
• Easy Installation - Clear all wires from the old board. Unscrew and remove the cover support, then disconnect the three power wires and remove the protective plate along with the old board. Install the new board and connect the included power jumper. In older control boxes, you might notice a chip on the right side of the new board that prevents the metal guard from sitting properly—simply trim a small section of the guard so it can bend away from the chip, and installation is complete
• Reliable Heater Operation - Ensures your spa heater runs smoothly for consistent, comfortable water temperature. Please confirm you’ve selected the correct model before purchase
• Important Installation Note - Before installation, please check the small voltage jumper located at the top of the relay board. For IQ2020 control systems, the jumpermust be set to 12Vbefore powering on. The board may be shipped with the jumper preset to 18V by default. Installing the board with the incorrect jumper setting may cause malfunction or damage to the main control board