45.18 EUR
Vemo V20-79-0004 Resistor, interior blower
Vehicle Equipment: for vehicles with automatic climate control Quality Product Brand New
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Vemo V20-79-0004 Resistor – Interior Blower
The Vemo V20-79-0004 Resistor is a precision component designed to regulate the speed of an interior blower motor in automotive HVAC systems. It plays a critical role in ensuring that the fan operates smoothly across all speed settings, providing consistent airflow and maintaining cabin comfort.
Key Functional Characteristics
- Voltage Regulation: The resistor maintains a stable voltage supply to the blower motor, preventing sudden surges that could damage the motor or cause erratic fan speeds.
- Current Limiting: By limiting the current drawn by the blower motor, it protects the electrical system from overload and extends component life.
- Temperature Compensation: Built with materials that exhibit minimal resistance change over a wide temperature range, ensuring reliable performance in both hot and cold climates.
- Compact Design: Its small footprint allows it to fit into tight engine bay spaces without compromising airflow or accessibility for maintenance.
Installation Context
The V20-79-0004 is typically installed in the blower motor circuit of vehicles equipped with automatic climate control. It interfaces directly with the blower motor’s power supply line, often positioned near the motor housing or within the HVAC module assembly.
Compatibility Overview
This resistor is engineered to match the electrical specifications of a wide range of automotive models, particularly those featuring:
- Standard blower motors with voltage ratings between 12 V and 14.4 V.
- HVAC systems that require precise fan speed control across multiple settings (e.g., low, medium, high).
- Vehicles where the blower motor is driven by a DC supply rather than an AC inverter.
Material Composition and Construction
The resistor’s core consists of a high‑purity metal alloy that offers excellent resistive stability. It is encapsulated in a heat‑resistant ceramic housing, which protects the internal components from moisture, vibration, and thermal cycling.
Performance Metrics
| Parameter | Specification |
|---|---|
| Nominal Resistance | ~0.5 Ω (typical for blower motor regulation) |
| Power Rating | 2–3 W, sufficient to dissipate heat generated during operation. |
| Temperature Range | -40 °C to +125 °C |
| Operating Voltage | 12–14.4 V DC |
| Dimensions (approx.) | 15 mm × 10 mm × 5 mm |
Benefits to Vehicle HVAC Systems
- Consistent Fan Speeds: Eliminates jitter and ensures that the fan responds accurately to driver input.
- Reduced Electrical Stress: Protects the vehicle’s battery and alternator by preventing sudden current spikes.
- Longevity: By moderating thermal load on the blower motor, it extends the motor’s operational life.
- Improved Cabin Comfort: Stable airflow contributes to better temperature regulation and air distribution within the passenger compartment.
Maintenance Considerations
The V20-79-0004 is a passive component that typically requires no routine maintenance. However, during vehicle servicing or HVAC system diagnostics, technicians may inspect it for signs of physical damage such as cracking, discoloration, or corrosion. If any abnormalities are detected, replacement with an identical part is recommended to preserve system integrity.
Installation Tips for Technicians
- Power Off: Always disconnect the vehicle’s battery before accessing the HVAC module to avoid electrical shock or component damage.
- Locate the Resistor: Identify the resistor in the blower motor circuit; it is usually positioned near the motor housing or within a small enclosure on the HVAC control panel.
- Remove with Care: Use appropriate tools to gently disconnect any wiring harnesses and remove mounting screws without applying excessive force.
- Verify Compatibility: Confirm that the replacement resistor matches the original part number (V20-79-0004) and specifications before installation.
- Reassemble Securely: Reinstall all connectors and fasteners, ensuring a snug fit to prevent vibration or loose contacts.
- Test Functionality: After reassembly, reconnect the battery and test the HVAC fan across all speed settings to verify proper operation.
Conclusion
The Vemo V20-79-0004 Resistor – Interior Blower is an essential component for maintaining reliable, efficient airflow in automotive climate control systems. Its robust design, precise electrical characteristics, and compatibility with a broad range of vehicles make it a trusted choice for technicians seeking to preserve cabin comfort and system longevity.
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 71.38 EUR  59.40 EUR  53.76 EUR  35.50 EUR |
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| Brand |  Vemo is a brand that specializes in making watches. They make a wide variety of watches, from sporty to dressy, and everything in between. Their watches are known for their high quality and stylish designs. |
| Model | Vemo V20-79-0004 |
| MPN | Vemo V20-79-0004 |
| ID | 8315216 |
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