Gecko Heat.Wav IN.YJ 4KW Spa Heater 2" w/Sensors (0613-421009)

The Gecko Heat.Wav IN.YJ 4KW Remote Heater (0613-421009 / GK0613421009) is a high-efficiency flow-through spa heater designed specifically for Gecko IN.YJ control systems. Featuring built-in temperature and flow sensors with a 4-foot terminated cable, this heater delivers reliable 1.0kW/4.0kW dual-voltage performance and can be installed up to 3.5 inches away from the control pack for maximum flexibility.

🚩 PRO TIP

This heater replaces ALL current and previous IN.YJ heater models — including the 0613-421001. Ensure a minimum flow rate of 18 GPM (68.1 LPM) for proper operation.

PRODUCT FEATURES

• 4.0kW Output: 1.0kW at 115V / 4.0kW at 230V for efficient spa heating.
• Integrated Sensors: Built-in temperature probe and flow sensor for accurate control.
• Design: 2-inch connection size with a 15-inch straight housing configuration.
• Remote Mounting: 4-foot terminated cable allows installation up to 3.5" from the control pack.
• Direct Replacement: Replaces all current and previous Gecko IN.YJ heater models (including 0613-421001, 390523, and GK0613421009).

TECHNICAL SPECIFICATIONS

• Brand: Gecko Alliance
• Manufacturer Part Number (MPN):: 0613-421009
• SKU: GK0613421009
• Model: Heat.Wav for IN.YJ
• Power / Voltage: 1.0kW (115V) / 4.0kW (230V)
• Connection Size: 2-inch
• Heater Length: 15 inches
• Cord Length: 4 feet
• Minimum Flow Rate: 18 GPM (68.1 LPM)

FREQUENTLY ASKED QUESTIONS (FAQ)

What control systems is this heater compatible with?

This heater is designed exclusively for Gecko IN.YJ (Y-Series) control systems.

Does this replace my older 0613-421001 heater?

Yes, the 0613-421009 is the direct, upgraded replacement for the older 0613-421001 model and requires no modifications to fit.

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