Boiler Leaking Oil: What to Do

  • 1-3 hours
  • Intermediate
  • 5-30
What You'll Need
Old rags
Fairy liquid
Hot water
What You'll Need
Old rags
Fairy liquid
Hot water

An efficient boiler adds to the comfort of our daily living experience. It performs an essential water heating role to meet household needs. Boilers for home use may be powered by oil, natural gas or electricity. Depending on your model, the system may sometimes leak oil. This may be caused by a damaged valve or pipe in the heating system. The fuel pipe or other parts may be loosely attached. Components in the burner may also be defective. A persistent leak may cause stains to develop on the floor. It may also give rise to an unpleasant smell if left unattended. Here's what you can do if you spot an oil leak.

Step 1 – Turn off

Before you begin your repair work, be sure to turn off the heating system. This will ensure that you work in a safe environment.

Step 2 – Inspection

Carefully check the entire heating system to detect the exact source of leaking. This will help you determine where to focus your repairs.

Step 3 – Tighten Components

As you inspect the system, you may come across some loose components. The fuel pipe may be insecurely fitted. If so, tighten it to give a firm fitting. Loose attachments may allow oil to seep through during operations.

Step 4 – Replace Damaged Components

It is best to replace any damaged parts you identify. Detach the faulty component and take with you to a boiler dealer. This will ensure that you get the right replacement.

Step 5 – Open the Burner

The burner performs the heating function. Oil leakage sometimes occurs here. If leakage is from the filter or fire valve, the top of the burner should be wet. A dry top indicates the problem may be from elsewhere within the burner. Use a screwdriver to remove the burner top. Place screws and top in a convenient place for easy retrieval later.

Step 6 – Inspect Oil Line

The oil line is attached to the oil pump. Carefully inspect the oil line to determine if it is okay. Any worn out or damaged areas could allow oil to seep through. It is best to replace the oil line if it appears faulty.

Step 7 – Inspect Oil Pump

Check the screws and plugs on the oil pump. These may have been loosened during maintenance, such as bleeding the system. This can allow leakage to occur. Be sure to tighten components.

Step 8 – Identify Hydraulic Jack

This component may also cause oil to leak. It could have been damaged during operations or previous maintenance work. It could also have worn out. A faulty hydraulic jack has to be replaced. Remove the item and take it with you to a dealer to get a fitting replacement.

Step 9 – Close the Burner

Retrieve burner top and screws from storage. Attach as before. Turn the system on. No more oil leakage should be evident.

Step 10 – Clean

Use fairy liquid and lots of hot water to clean oil stained areas around the boiler.