Oil Furnace - Test Procedure

Oil Furnaces

Re: Test Procedure / Checkout Steps

1. Check Oil Supply

If the furnace is running, turn the thermostat off and allow the furnace to cool.
Turn off power to the furnace.
Remove the oil supply line from the nozzle assembly.
Gently bend the supply line to be able to spray oil into a cup.
Place a jumper across the thermostat input to the controller.
Re-apply power to the furnace.
- If the burner does not start, press the reset button on the primary control to reset.
Allow the furnace to pump oil into a cup for up to 5 seconds (stop by turning off power).
- Oil stream should start immediately with the pump motor (except newer models with a delay solenoid valve).
- Oil stream should be continuous and have adequate pressure.
- Oil stream should be solid red (white foam indicates air).

2. Check Transformer & Electrodes

TEST TRANSFORMER
Turn off power to the furnace.
Un-hook power wires to the ignition transformer.
Hook-up a "Transformer Tester" to the transformer power wires.
Test the Transformer.
TEST ELECTRODES
Remove the Electrode / Nozzle assembly from the burner.
Use a well-insulated pair of pliers to hold the Electrode / Nozzle assembly on the transformer.
Use a jumper wire to Ground the Electrode / Nozzle assembly.
Power the transformer with the "Transformer Tester".
Observe the electrodes for a proper spark pattern.

3. Clean Cad Cell

4. Check / Replace Nozzle

If the nozzle has not been replaced in the past year, it is best to go ahead and install a new nozzle.
Lift the ignition transformer to expose the electrode/nozzle assembly.
Remove the "keeper" ring from the electrode/nozzle assembly.
Note the adjustment position of the nozzle assembly.
Loosen the positioning screw if necessary.
Remove the electrode/nozzle assembly.
Replace the nozzle.
- Be Aware! When you loosen the nozzle, oil will run out of the assembly.

5. Check Electrode Adjustment

6. Check Ignition/Burner