CUMMINS 333-0639-01 Onan Block Heater Water 240/480V 4990 E204747

( Brand: Cummins ), ( Manufacturer Part Number: 333-0639-01 ), ( Part Type: 480v Block Heater ), ( Equipment Type: Block Heater ), ( Country Of Origin: United States )

Review CUMMINS Onan Block Heater Water 240/480v

The Cummins Onan 333-0639-01 block heater is an essential accessory for ensuring your Onan RV generator starts easily in cold weather conditions. This heavy-duty heater is designed to keep the generator's engine oil and coolant at optimal temperatures, preventing the engine from becoming too viscous or thick to turn over.

The block heater is rated for both 240V and 480V electrical systems, providing flexibility for various RV power configurations. Its robust design features a 4.9 kW heating capacity, making it suitable for use in extreme cold weather environments. This heater is specifically engineered for the Cummins Onan E204747 generator models, ensuring a perfect fit and reliable performance.

The 333-0639-01 block heater is constructed with high-quality materials, including a durable powder-coated steel housing that protects against the elements and corrosion. The heating element is made of heavy-duty materials to provide long-lasting performance, and it is designed with thermal cutout protection to prevent overheating and potential damage to the generator.

This block heater comes with a convenient 10-foot power cord that is grounded for safety, allowing for easy installation and connection to your RV's electrical system. The cord is also equipped with a NEMA 5-15P plug, which is a standard plug type found in most RV electrical systems.

The Cummins Onan 333-0639-01 block heater is an essential addition to your RV generator setup, providing peace of mind and ensuring reliable performance in cold weather conditions. Its heavy-duty design and versatile electrical compatibility make it a valuable investment for any RV owner.

Cummins Onan Block Heater (Cummins 333-0639-01): A Comprehensive Analysis

The Cummins Onan 333-0639-01 block heater is a popular choice for those who own generators or engines that require frost protection in cold weather conditions. Here's a balanced assessment of the product, outlining its advantages, disadvantages, and a concluding recommendation.

1. Efficient Frost Protection: The block heater is specifically designed to provide reliable frost protection for engines and generators, ensuring optimal performance in freezing temperatures.

2. Versatile Voltage Compatibility: The heater is compatible with both 240V and 480V power sources, making it a versatile option for various applications.

3. Durable Construction: The heater is built with high-quality materials and features a robust design, ensuring long-lasting performance and reliability.

4. Easy Installation: The installation process is straightforward and can be completed with minimal effort, saving time and resources.

1. Power Consumption: The block heater consumes a significant amount of power to maintain the desired temperature, which can result in increased energy costs.

2. Manual Control: The heater does not come with an automatic temperature control feature, requiring users to manually turn it on and off.

3. Potential Size Concerns: Depending on the size of the engine or generator being heated, the heater may be too large or bulky for some applications.

The Cummins Onan 333-0639-01 block heater is an effective solution for providing frost protection to engines and generators in cold weather conditions. Its versatile voltage compatibility, durable construction, and efficient frost protection make it a popular choice among users. However, its power consumption and lack of automatic temperature control may be drawbacks for some. Ultimately, the decision to purchase this block heater depends on the specific needs and requirements of the user.

Based on the advantages and disadvantages outlined above, we recommend the Cummins Onan 333-0639-01 block heater for those who require reliable frost protection for their engines or generators, and who have the necessary power source to support its energy consumption. Users seeking automatic temperature control may want to consider alternative options.

Details:

Oem heater Open box never used.

part #: 333063901 prices

• $320.00-$700.00

specifications generatormac:

• brand: Cummins
• mpn: 333-0639-01
• part type: 480v Block Heater
• equipment type: Block Heater
• country of origin: United States

general generatormac:

• condition: New Open box
• Business Industrial > Light Equipment Tools > Generator Parts Accessories

seller generatormac:

• # reviews: 129
• rating: 88.9%
• city: Euless, Texas

payments generatormac:

• credit card: Discover
• wallet: Paypal
• other

returns generatormac:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer
• method: Money back

offer generatormac:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0
• best offers: True
• started: November 27, 2025

shipping generatormac:

• service: USPS Media Mail
• type: Calculated
• cost: $5.22
• class: Economy
• carrier: USPS
• transit: 5-11 Days

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