Volvo HVAC Blower Power Stage OE 20443826 / 351332-391 – Aluminum Pin Heat Sink Module

Heavy Duty Blower Motor Resistor Overview

A blower power stage (also called a blower motor resistor module) regulates electrical power to the HVAC blower motor to achieve smooth fan speed control. Compared with open-coil resistor plates, a power stage typically provides more stable speed regulation and uses a heat sink to manage thermal load.

• OE-level aftermarket replacement for Volvo 20443826 blower power stage

• Aluminum pin heat sink improves thermal stability during continuous operation

• OE-style connector layout supports faster fitment verification

• Fitment verification support by OE + connector photo + mounting points

• Bulk supply for importers/distributors (MOQ 100)

OEM Cross Reference – Volvo 20443826 / 351332-391

Important notice : OE / interchange numbers are for reference only. Please confirm fitment by OE number + connector layout + mounting pattern before ordering.

Vehicle Fitment – Volvo HVAC Blower Power Stage (Verification Recommended)

Technical Specifications – Aluminum Pin Heat Sink Blower Module

Wire-Wound HVAC Resistor Block Design and Features

High-power wire-wound ceramic core

Stable resistance performance under continuous HVAC blower loads, supporting consistent fan speeds in truck HVAC systems.

Open-frame cooling structure

Improves airflow around the resistor element to enhance heat dissipation and reduce overheating risk.

Reinforced metal bracket

Designed for vibration resistance and stable installation on heavy-duty trucks and commercial vehicles.

Blower Motor Resistor Failure Symptoms and Diagnosis for Fleet Maintenance

Common symptoms of a faulty blower motor resistor include:

• Only one fan speed works

• Blower runs intermittently or stops

• No airflow from vents

• Burnt connector or overheating smell

• Unstable cabin temperature control

HVAC Resistor Block Installation Notes and Connector Check

• Confirm terminal layout and mounting pattern before installation

• Replace melted connector housing if overheating occurred

• If repeat failures happen, inspect blower motor current draw and wiring resistance

• Professional installation recommended for workshops and fleet environments

Blower Motor Resistor Quality Testing and Manufacturing Standard

From a manufacturer's standpoint, the most common field issues come from overheating and poor terminal contact. Our batch-level controls focus on:

• Resistance stability and electrical continuity checks

• Terminal contact and alignment inspection

• Assembly consistency for bracket positioning

• Heat endurance verification for production batches

Export Packing & Container Loading for Bulk Orders

For distributors and importers, stable packaging and shipment execution matter as much as product quality. We prepare bulk orders with export-standard carton packing, palletizing, and container loading. Before shipment, we can share loading photos and packing details to help you manage receiving and warehouse operations.

What you can expect

• Export-grade cartons with clear carton marks (OE No. / qty / batch)

• Palletizing + stretch wrap to reduce damage during long-distance transport

• Container loading with space optimization for bulk shipments

• Mixed-SKU consolidation support (send your part list for packing plan)

• Shipment photos available for your receiving & documentation process

MOQ note: MOQ is 100 pcs per item. For bulk orders, share your destination port and order mix—we'll propose an efficient packing and loading plan.

Sample Room & Fast Fitment Verification

For distributors and importers, the key to a smooth first order is fast and accurate fitment confirmation. Our dedicated sample room keeps resistor blocks and related HVAC electrical parts organized by OE reference and application. This enables quick cross-checking of connector layout, mounting pattern, and structure, so you can reduce wrong-fit risk and shorten purchasing cycles.

What this means for your sourcing team

• Faster OE and application verification before bulk production

• Quick photo support (connector & bracket details) for your internal approval

• Sample availability for evaluation and comparison

• Better accuracy for distributor listings and warehouse SKU management

• Reduced returns caused by mismatched connectors or mounting holes

How to request a sample or verification

Send your OE number / reference number, photos of the original part (if available), and target quantity. We'll confirm match and advise the most suitable option for your market.

Blower Motor Resistor MOQ 100 and Packaging for Bulk Orders

MOQ: 100 pcs for bulk orders. We support B2B export packaging suitable for importer/distributor warehousing.

To quote efficiently, please send:

• OE number: 20443826

• Quantity (MOQ 100 pcs)

• Destination / port

• Connector & bracket photos (recommended for fast confirmation)

FAQ – Volvo Blower Power Stage OE 20443826 / 351332-391

1. How should buyers confirm the correct 20443826 power stage module?

Match OE 20443826 plus connector layout and arc-shaped mounting points. The curved housing profile is a key identifier for this module type.

2. What is the difference between a "blower power stage" and a resistor plate?

A power stage is an electronic blower speed controller module (often with heat sink cooling) that provides smoother regulation. A resistor plate uses stepped resistance stages and relies more on airflow cooling.

3. Why does this module use an aluminum pin heat sink?

Pin-fin heat sinks increase surface area, helping dissipate heat generated during speed control. This improves stability during long HVAC operation, especially in warm environments and continuous use.

4. What are typical failure symptoms of a Volvo blower power stage?

Common symptoms include no blower, intermittent airflow, speed not responding, or blower stuck at one speed—often linked to thermal stress or connector contact issues.

5. What are the most common wrong-order causes for arc-shaped power stage modules?

Wrong orders usually come from different mounting hole positions or connector keying differences between revisions. Photo verification is recommended for bulk orders.

6. What should workshops check if the new power stage fails again quickly?

Check blower motor current draw, cabin filter blockage, and connector heat damage. High motor load or poor contact can overheat a new module.

7. Does a melted connector plug need replacement when installing a new module?

Yes. If the vehicle-side plug shows melting/discoloration, replacing the connector housing is recommended to restore proper contact and prevent repeat overheating.

8. What incoming QC checks should distributors do for bulk shipments?

Recommended QC includes connector pin alignment, mounting point consistency, heat sink integrity, and label verification for 20443826 / 351332-391.

9. What information should B2B buyers provide for fastest quotation and confirmation?

Provide OE 20443826, quantity (MOQ 100), destination/port, and photos of connector + mounting points to avoid wrong-fit bulk orders.

10. Can you support private label packaging and listing materials for distributors?

Yes. For bulk orders we support neutral/branded packaging, barcode labeling, and listing-ready photos/content to help distributors launch faster.