What Is Navien Error Code 003? How To Fix Navien Error Code 003?
by J Nandhini
Updated Feb 09, 2023
What Is Navien Error Code 003?
Navien Error Code 003 is a diagnostic error code that is displayed on Navien boilers, water heaters, and heating systems. This error code typically indicates a problem with the fuel supply or combustion process in the machine. The exact cause of the error can vary, but common causes include low fuel levels, low gas pressure, dirty air filters, dirty fuel filters, faulty spark plugs, and dirty combustion chambers. If you receive Navien Error Code 003, it is recommended that you consult a qualified technician for diagnosis and repair.
Causes Of Navien Error Code 003
Navien Error Code 003 can be caused by a number of factors, including:
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Low fuel level in the tank: If the fuel level in the tank is low, the engine may not be getting enough fuel to run properly, leading to the error code.
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Low gas pressure: If the gas pressure is low, the engine may not be getting enough fuel to run properly, leading to the error code.
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Dirty air filter: A dirty air filter can restrict the airflow to the engine, leading to the error code.
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Dirty fuel filter: A dirty fuel filter can restrict the fuel flow to the engine, leading to the error code.
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Faulty spark plugs: If the spark plugs are not firing properly, the engine may not be getting the spark it needs to run properly, leading to the error code.
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Dirty combustion chamber: A dirty combustion chamber can cause the engine to run poorly, leading to the error code.
How To Fix Navien Error Code 003?
Navien Error Code 003 usually indicates a problem with the fuel supply or combustion process in the Navien machine. To fix this error, follow these steps:
1. Adjust the Water Pressure
Turn the water valve counterclockwise to open it.
Observe the reading on the water pressure gauge to determine if it is high or low.
If it is high, turn the water valve counterclockwise until the reading is low. If it is low, turn the valve clockwise until the reading is high.
In case the reading still doesn't change, turn off the water valve completely and turn it back on. If the issue still persists, seek assistance from a professional.
2. Maintain the Inlet Filter
Open the Navien machine and locate the inlet filter.
Remove the existing filter.
Clean the filter using a clean cloth.
Reinstall the cleaned filter.
3. Verify the Gas Pressure
Check the fuel level in the tank. A low fuel level may result in the Navien machine giving error code 003.
Check the gas pressure and make sure it is at the correct level.
Inspect the air filter and clean it if necessary.
Check the fuel filter and clean it if needed.
Verify that the spark plugs are working correctly.
4. Sanitize the Combustion Chamber
Take out the spark plugs and air filter.
Clean the combustion chamber thoroughly using a degreaser and a brush.
Wipe the chamber dry using a clean cloth.
Reinstall the spark plugs and air filter.
Start the engine and check for the Navien error code 003.
What Is Navien Error Code 003? How To Fix Navien Error Code 003? - FAQs
Navien Error Code 003 is a diagnostic error code that is displayed on Navien boilers, water heaters, and heating systems.
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Adjust the Water Pressure
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Maintain the Inlet Filter
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Verify the Gas Pressure
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Sanitize the Combustion Chamber