MASTER SPAS Heater 4kW - X300937

MASTER SPAS Heater 4kW  - X300937

Heater 4 kW with M7 sensors(V/N 55950)

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Q&A

Q: What is the MASTER SPAS 4kW Heater (X300937)?
A: A genuine OEM 4.0kW flow-through electric heater used in Master Spas systems to heat and maintain water temperature in swim spas and hot tubs.

Q: What does it do?
A: It heats circulating spa water as part of the control system, working with sensors and the spa pack to maintain set temperature and prevent overheating or dry-fire conditions.

Q: What spas is it compatible with?
A: Commonly used in select Master Spas swim spas (including H2X Momentum systems) and models using the M7 control platform.

Q: What are its specifications?
A: 4.0kW power rating, 240V operation, stainless steel flow-through design with integrated temperature sensors for system protection.

Q: Is it a direct replacement part?
A: Yes, it replaces original heater assemblies in compatible Master Spas systems and is designed for direct OEM fitment.

Q: Does it require professional installation?
A: Yes. Correct wiring, sensor connection, and system configuration are required to avoid damage and ensure safe operation.

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