Overview — Coolant Heater 249-0859
249-0859 is the coolant heater used on CUMMINS engines to keep the engine block warm for reliable cold-weather starting, heating the coolant so the engine reaches operating temperature faster. We can supply all the original and replacement part numbers listed below, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The heater is rated for the original wattage and voltage, sized to suit the engine’s coolant circuit. The heating element is enclosed in a corrosion-resistant body with the original thread or flange fitting, and the electrical connection accepts the standard supply lead. A built-in thermal protection guards against dry operation, and the seal prevents coolant loss at the installation point. As an OEM-spec heater, it provides the designed heating capacity for the engine application.
Applicable Models & Applications
This coolant heater is used on CUMMINS engine families where cold-start assistance is specified, including generator sets, industrial engines and construction equipment operating in low temperatures. The family references 3309189 and 330918900 cover the same heater duty on adjacent builds. Typical applications include standby generators, pumps, compressors and mobile equipment that must start reliably in cold weather. Confirm the wattage, voltage and fitting size against the heater removed from your engine before ordering.
Maintenance & Replacement
Check the heater element and its electrical connections each season before cold weather, and confirm the coolant level is correct since the heater must be fully immersed. Replace the heater if the element is open-circuit, the body shows corrosion, or the seal leaks. When installing, fit the new sealing ring, bleed the coolant circuit, and verify the heater draws current with a clamp meter. Never energize the heater without coolant, and check the supply circuit and its protection before operation.
Price Reference (USD)
The reference price for this Coolant Heater (249-0859) is approximately USD 40 – 150 per unit depending on wattage, brand grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Also in the COOLANT HEATER Series
3309189, 330918900.
Value & Service
A heater with the wrong wattage or fitting wastes money and may not start the engine in deep cold, so we verify 249-0859 against the original CUMMINS specification and confirm voltage and fitting before dispatch. We stock the heater and the family numbers listed above and can ship worldwide with tracking. Our team will confirm the correct element for your engine and climate before you order.
Racer Machinery is a dedicated construction-machinery parts supplier — send us your part number and engine model, and we will confirm fitment, price and lead time for this coolant heater and related CUMMINS cold-start components.
