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Silicone heater hose is a kind of heating element applied in the automotive field, which is characterized by high temperature resistance, corrosion resistance, soft and bendable, etc. It is mainly used for heating engines, air conditioners, seats and other parts. Understanding the working principle of automotive silicone heating hoses can help us to use and maintain them better.

Silicone heating hose structure

Inner layer: food-grade silica gel, with good resistance to high temperature, corrosion and abrasion, can directly contact the medium.
Middle layer: resistance wire, made of nickel-chromium alloy, with high resistivity and good high temperature resistance.
Outer layer: Silicone, with good high temperature resistance, corrosion resistance, insulation properties, play a protective role.

Silicone Heater Hose

Electrothermal Principle

Silicone heated hoses work through the principle of electrical heating. When the hose is connected to the vehicle’s electrical system. an electric current flows through the heat-conducting element inside the hose, whose resistance generates heat. This heat is transferred to the inner wall of the hose, which in turn heats the coolant. Once the coolant reaches a set temperature, the heating element automatically stops heating to prevent overheating.

Temperature control

Silicone heated hoses are usually equipped with a temperature control that regulates the heating power according to the ambient temperature and engine requirements. This ensures that the coolant is kept at the right temperature under all conditions, neither too hot nor too cold, thus effectively protecting the engine.

Silicone Heater Hose

Application Scenario

Automotive silicone heated hoses are mainly used in engine cooling systems, especially in cold regions or cold seasons. They can be used not only in automobiles, but also in other types of internal combustion engines, such as diesel generator sets, ships and construction machinery.


To summarize, automotive silicone heated hoses effectively transfer heat to the coolant through the principle of electric heating. Thus enhancing the efficiency and reliability of engine operation in cold environments. Understanding its working principle helps users better understand its role in automotive engineering and use and maintain it correctly.

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