Hot Spring No-Fault Titanium Water Heater 4 kW – 76228

The Hot Spring 76228 4 kW titanium heater is a replacement part designed for several Hot Spring, Limelight, and Tiger River spas compatible with the control system IQ 2020.

Thanks to its titanium construction and the technology No-Fault, this heater offers excellent corrosion resistance and helps maintain a stable and comfortable water temperature.

The set also includes the replacement pressure switch cable and new O-rings for the thermistors.

Efficient 4 kW heating

With a rated power of 4 kW, this heater helps restore effective temperature rise when the circulation system and other spa components are functioning properly.

It notably allows to:

• Replace a worn or defective heater
• Restore spa heating
• Maintain stable water temperature
• Ensure reliable system operation
• Preserve spa comfort

The actual heating speed varies depending on water volume, outside temperature, spa insulation, and overall equipment condition.

Corrosion-resistant titanium construction

The titanium heating element offers high resistance to corrosion and the chemical conditions present in spa water.

Titanium benefits

• Excellent corrosion resistance
• Good chemical resistance
• Reduced risk of premature deterioration
• Superior durability in properly balanced water
• Stable performance over time

Even with a titanium heater, it remains essential to maintain pH, alkalinity, and sanitizer levels within the ranges recommended by Hot Spring.

Hot Spring No-Fault Technology

The technology No-Fault is used on Hot Spring heating systems to provide durable operation suited to the usage conditions of the brand’s spas.

The heater works together with thermistors, the circulation system, and the IQ 2020 control board to monitor water temperature and flow.

Compatible with the IQ 2020 system

The 76228 heater is designed for several spas using the control system Hot Spring IQ 2020.

The pressure switch cable connects to the corresponding port on the control board, usually identified P34 on compatible systems.

The green and red indicator lights of the IQ 2020 system can help signal certain operating conditions or anomalies requiring inspection.

However, the presence of indicator lights does not replace a full diagnosis performed by a qualified technician.

Replacement cable for pressure switch included

The set includes a cable designed to replace the pressure switch connection on compatible systems.

This component allows the control system to monitor the conditions necessary for the safe operation of the water heater.

The cable must be installed according to the spa configuration and manufacturer instructions.

O-rings for thermistors included

Two new O-rings are provided for the thermistors.

Replacing these seals during installation helps to:

• Ensure good sealing
• Reduce the risk of leaks
• Keep the thermistors properly positioned
• Protect the fittings around the water heater

The thermistors themselves are not necessarily included unless otherwise specified.

Compatibility

The Hot Spring 76228 water heater may fit several compatible models manufactured from 2003, including the following ranges:

• Hot Spring Highlife
• Hot Spring Limelight
• Tiger River

Compatibility may vary depending on:

• The year of manufacture
• The exact spa model
• The serial number
• The installed control system
• The plumbing configuration
• The model of the currently installed water heater

Before ordering, it is strongly recommended to confirm compatibility using the spa serial number and the old water heater part number.

Recommended checks before purchase

Compare the following with the existing equipment:

• Part number 76228
• 4 kW power
• IQ 2020 control system
• Type of electrical connection
• Thermistor position
• Pressure switch connection
• Plumbing diameter and orientation
• Spa model and year
• Spa serial number

A visually similar part may have different power, configuration, or compatibility.

Professional installation recommended

Replacing a spa water heater involves working on a high-voltage electrical circuit and the spa plumbing.

Installation should be performed by a qualified or Hot Spring authorized technician.

General steps

1. Completely cut off the spa's electrical power supply.
2. Confirm the absence of voltage.
3. Drain or isolate the water heater circuit.
4. Remove the old water heater.
5. Inspect the fittings, thermistors, and plumbing.
6. Install the new O-rings.
7. Install the replacement heater.
8. Connect the pressure switch cable to the appropriate port.
9. Fill the system and completely eliminate air.
10. Check for leaks.
11. Restore power and test operation.

Never power the heater when it is empty or without water circulation. Dry operation can quickly damage the heating element.

Recommended checks when replacing

A heating failure can sometimes originate from another spa component.

It is recommended to check:

• Circulation pump
• Filter cleanliness
• Water flow
• Thermistors
• Pressure switch or its wiring
• Electrical connections
• Control board relays
• IQ 2020 system indicators
• Presence of an air pocket
• Water chemical balance
• Presence of scale or corrosion

Fixing the root cause of the failure helps protect the new heater.

Key features

• Replacement spa heater
• Hot Spring part 76228
• Rated power of 4 kW
• Titanium construction
• No-Fault technology
• Compatible with several IQ 2020 systems
• Replacement cable for pressure switch included
• Two O-rings for thermistors included
• Compatible with several Highlife, Limelight, and Tiger River models
• Excellent corrosion resistance
• Professional installation recommended

Technical specifications

Product
Spa heater

Brand
Hot Spring

Part number
76228

Type
No-Fault heater

Power
4 kW

Material
Titanium

Compatible control system
IQ 2020

Pressure switch connection
Compatible port on the control board, usually identified as P34

Main compatibility
Certain Hot Spring Highlife, Limelight, and Tiger River spas manufactured from 2003

Installation
Professional installation recommended

Package contents

• 1 Hot Spring No-Fault 4 kW titanium heater
• 1 replacement cable for the pressure switch
• 2 O-rings for thermistors

Thermistors, plumbing fittings, and other components are sold separately unless otherwise indicated.

Effectively restore your spa’s heating

The Hot Spring 76228 titanium heater offers a durable solution to replace a faulty heating system in a compatible spa.

Its titanium construction, 4 kW power, and compatibility with several IQ 2020 systems make it a reliable replacement part to restore warm and comfortable water.

Available at Piscine Hippocampe.