Hurlcon Gas Heater Error Codes – HX, WX, JX & MX Troubleshooting Guide

Hurlcon gas pool and spa heaters use a range of fault codes and safety systems to detect problems during operation. These codes help identify issues with water flow, ignition, temperature, and internal components.

Hurlcon heaters were later rebranded under AstralPool, with models such as the HX and JX ranges continuing under the AstralPool name. This means many Hurlcon heater fault codes and troubleshooting methods also apply to AstralPool gas heaters.

Note: These Hurlcon heater error codes and faults also apply to AstralPool HX and JX gas heaters, as they are the same heater models rebranded under AstralPool.

This guide covers all major Hurlcon gas heater models, including HX, WX, JX, and MX heaters, and links to detailed troubleshooting pages for each fault.

Hurlcon Gas Heater Models Covered

• HX Series (also AstralPool HX)
• WX Series (legacy models)
• JX Series (also AstralPool JX)
• MX Series (includes additional safety protections)

Hurlcon HX, WX & JX Error Codes

The HX, WX, and JX heater ranges share similar control systems and fault codes. These models are the most commonly used Hurlcon and AstralPool gas heaters.

• F0 Error – Thermostat or PCB Fault
  Often caused by temperature sensor issues or control board faults.
• F1 Error – Temperature Safety Shutdown
  Commonly linked to water flow problems or overheating conditions.
• F2 Error – High Temperature Fault
  Usually caused by restricted water flow, sensor faults, or circulation issues.
• Ignition Fault – Heater Won’t Start
  May be related to gas supply issues, ignition failure, or flame detection faults.
• Overheating or Short Cycling
  Often caused by poor water circulation, blocked filters, or incorrect system setup.

Hurlcon MX Heater Error Codes

The Hurlcon MX range includes additional safety protections not found in HX, WX, and JX heaters, including flame rollout detection. These faults are critical and should not be ignored.

• F4 Error – Flame Rollout Fault
  Indicates a dangerous combustion issue, often caused by blocked flue systems, airflow restrictions, or burner problems.

Common Hurlcon Heater Problems

Many faults occur across all Hurlcon gas heater models regardless of the specific error code displayed.

• Pool heater not heating
• Pool heater not igniting
• Heater starts then stops
• Understanding heater error codes

Common Causes of Hurlcon Heater Faults

Most Hurlcon gas heater problems can be traced to a small number of underlying issues. These include water flow problems, ignition faults, gas supply issues, and component failures.

• Water flow issues
• Pressure switch faults
• Temperature sensor faults
• Ignition failure
• Gas supply issues
• Control board faults

When to Call a Professional

While some basic checks such as cleaning filters or confirming water flow can resolve simple issues, gas heater faults often require professional diagnosis.

If your heater is displaying fault codes, failing to ignite, overheating, or shutting down repeatedly, it should be inspected by a licensed gas fitter.

Book a Gas Heater Repair

This guide is provided for general information only. HeaterFix recommends all gas heater servicing, repairs, and replacements be carried out by a qualified licensed gas technician.