---
product_id: 320501611
title: "Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins"
brand: "hot spring"
price: "¥71553"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/320501611-hot-springs-heater-relay-board-77119-formerly-74618-iq-2020
store_origin: JP
region: Japan
---

# Efficient Power Connection Global Compatibility Upgraded Design Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins

**Brand:** hot spring
**Price:** ¥71553
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade Your Heat Game with the Latest Tech!

## Quick Answers

- **What is this?** Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins by hot spring
- **How much does it cost?** ¥71553 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/320501611-hot-springs-heater-relay-board-77119-formerly-74618-iq-2020)

## Best For

- hot spring enthusiasts

## Why This Product

- Trusted hot spring brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **💡 Smart Design:** New wiring connections optimize power flow, enhancing heater reliability.
- • **🌟 Universal Fit:** Compatible with all countries, making it the perfect global solution.
- • **🔄 Seamless Upgrade:** Replaces older models effortlessly, ensuring your system stays cutting-edge.
- • **🔋 Enhanced Efficiency:** Experience reduced fatigue on relays for longer-lasting performance.
- • **🛠️ Easy Installation:** Includes jumpers and shortened screws for a hassle-free setup.

## Overview

The Hot Spring Heater Relay Board 77119 is the latest revision designed for the IQ 2020 Control Box, offering enhanced efficiency and reliability. This upgraded circuit board replaces the older 74618 model and features improved power connections, ensuring optimal performance for your heating system. With easy installation and global compatibility, it's the perfect choice for maintaining your hot tub's heating efficiency.

## Description

Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins

## Features

- Item 77119 (replaces the old 74618 as of September 10, 2013)
- What is included: NewUpgraded IQ 2020 Heater Relay Board w/ Jumpers & Shortened Screws for the front cover of the IQ2020
- Description: New(New as of 9-10-2013) This IQ2020 Heater Relay Circuit Board is the newest revision for the 2001-2009.5 IQ2020 Control Box. It's upgraded design provides a more efficient method of connecting the heater's power cord to this board therefore reducing fatigue on the two "beefed up"relays. The black wire from the heater's power cord now connects into the H1 position on the large gray terminal block. The heater's white wire (neutral) connects onto its own separate gray terminal block
- Symptoms this part has failed: No power going to the heater even though the red HTR ON L.E.D. light is lit inside the IQ2020 control box. The heater board is charred on the front and/or the backside.
- Note: In older control boxes, you may encounter that a chip on this new heater relay board prevents the metal guard from seating properly and it may need to be trimmed. Visit backyardplus to watch video or download instructions. This circuit board works in all countries

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | green |
| Power Source | corded electric |
| Batteries Included? | No |
| Brand | Hot Spring |
| Department | Circuit Boards |
| Manufacturer | Hot Spring |
| Item model number | 74618 |
| Package Dimensions | 17.7 x 17.09 x 3.91 cm; 0.28 g |
| ASIN | B00COJZBYA |

## Images

![Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins - Image 1](https://m.media-amazon.com/images/I/71eHz6HiRlL.jpg)

## Questions & Answers

**Q: Will this replace 73357**
A: Yes, the 77119 board is provided as a replacement for the 73357.  The new part comes with installation instructions to make the change over.

**Q: I have a 2006 caldera geneva utopia spa that won’t stop heating so the spa is 130+ degrees. is it most likely a stuck relay on this board?**
A: Unfortunately this cannot be diagnosed by internet, someone needs to look at your spa.

**Q: Can anybody verify that this will replace the Watkins 74556 relay board as well?**
A: I used the Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins and it worked perfectly

**Q: Which system is 12volt and which is 18volt?**
A: Hi,
You can look at the relays on the motherboard. If they say they are 18vdc then you should set the relay board to the 18v setting. If it is one of the newer motherboards with 12v relays, then you should set it to 12v on the heater relay board.
Thanks! BYP

## Frequently Bought Together

- Hot Springs Heater Relay Board 77119 (Formerly 74618) IQ 2020 Watkins
- LAING Spa Circulation Pump E5 (with Free Peak Products 3 Pack Connectors Terminals) - 74427 for Watkins: Hot Spring, Tiger River, Caldera Hot Tubs
- POOLPURE C-6430 Spa Filter Replaces Watkins 31489, Pleatco PWK30, Filbur FC-3915, P/N0969601, 71825, 73178, 73250, 30 sq. ft. Hot Spring Spa Filter 5 Pack

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**Shop now:** [https://www.desertcart.jp/products/320501611-hot-springs-heater-relay-board-77119-formerly-74618-iq-2020](https://www.desertcart.jp/products/320501611-hot-springs-heater-relay-board-77119-formerly-74618-iq-2020)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-02*