21621751 Air Heater | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 12V 5kW Hot-Water Air Heater, 55mm Outlets - Part Number: 21621751

A compact cabin air heater using hot engine coolant and a three-speed radial fan to deliver up to 5kW of heating output.

⚙️ Key Features

• Electrical system: 12V

• Heating output: 5kW

• Air outlet diameter: 55mm

• Free-flow air volume: approximately 330m³/h

• Stainless-steel casing with copper and brass heat exchanger

• Approximate dimensions: approximately 230 × 160 × 236mm

• Approximate weight: approximately 5.1kg

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21621751 → Supersedes 41103331

OEM / Related Numbers:

• 21621751

• 41103331 - Earlier air-heater reference

• 21621721 - Coolant pipe set

• 21621971 - Related air outlet

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

• Volvo Penta hot-water cabin-heating systems

• 12V vessel electrical system

• 16mm coolant connections

• Ducting sized for 55mm outlets

🔌 Function

Hot engine coolant passes through the heater core while the electric fan moves cabin air across the core and into the ventilation ducts.

Common signs of failure or damage:

• Fan not operating at one or more speeds

• Little or no cabin heat

• Coolant leakage from the heater core

• Air trapped in the coolant circuit

• Electrical connector or fan-motor overheating

• Restricted airflow from blocked ducts

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging