Dometic ProHeat X45 12V Air Compressor
The Dometic ProHeat 930812K Air Compressor is the factory 12-volt compressor used in ProHeat X45 and X45 Plus diesel-fired coolant heaters.
The compressor supplies a metered amount of clean compressed air to the heater’s fuel nozzle. As the compressed air passes through the nozzle, it creates a venturi effect that draws fuel from the regulator and produces a fine fuel-and-air mist for combustion.
ProHeat identifies 930812K as the 12V compressor, with 930824K serving as the corresponding 24V version.
Key Features
- Genuine Dometic ProHeat replacement component
- Factory part number 930812K
- Fits ProHeat X45
- Fits ProHeat X45 Plus
- 12V electrical system
- Supplies metered compressed air to the fuel nozzle
- Creates the airflow needed for the nozzle’s venturi effect
- Supports fuel atomization for combustion
- Adjustable compressor air pressure
- Rebuild components available separately
- Factory replacement/service component
How the Air Compressor Works
The ProHeat X45 uses an air-assisted fuel atomization system.
During heater operation:
- The air compressor supplies a metered amount of compressed air to the fuel nozzle.
- Compressed air passes through the nozzle at high speed.
- The airflow creates a venturi effect at the nozzle.
- The pressure difference draws fuel from the fuel regulator into the nozzle.
- The nozzle mixes the fuel with the compressed air and produces a fine fuel-and-air mist.
- The mixture enters the combustion chamber, where it is ignited.
Proper compressor airflow and pressure are therefore important for maintaining the fuel atomization needed for correct heater combustion.
Product Specifications
- BTRAC SKU: PH-930812K
- Manufacturer: Dometic ProHeat
- Manufacturer Part Number: 930812K
- Product Type: Air Compressor
- Voltage: 12V
- Compatible Heater: ProHeat X45
- Compatible Heater: ProHeat X45 Plus
- System: Combustion Air / Fuel Atomization
- Primary Function: Supplies metered compressed air to the fuel nozzle
- Air Pressure: Adjustable based on altitude
- Separate Compressor Filter: 825730K
- Rebuild Kit: 954685K
- Diaphragm Kit: 980666K
- Application: Replacement / service component
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