Oil Furnace Burner On But No Fire

Oil Furnace Burner On But No Fire - Heating and Cooling

Oil furnace burners are used by most people to heat their houses. They are complex assemblies, usually trouble-free, and capable of giving you years of service. In order to enjoy them as long as possible, you should take good care of them by cleaning and maintaining them as necessary. Even if you are very careful, sometimes there may be certain troubleshooting issues.

What Do You Do With the Oil Furnace Burner On But No Fire?

Possible causes:

– The opening of the nozzle is clogged

– The transformer is short-circuited

– Short-circuited electrodes and electrode wires

Clogged Nozzle

If your oil furnace burner is on, but there is no fire, you should check a certain component called a burner nozzle. Its opening may be clogged – even a scarce quantity of dust or water may have caused it. Replace this part and the problem may disappear.

Short-Circuited Transformer

In the second situation, you will have to check the transformer. It is recommended that you disconnect the wires leading to the motor and to the furnace prior to this operation. You should leave only the wire leading to the transformer connected.

Use a handle-insulated screwdriver to touch this wire to one of its terminals. At the same time, lower its shaft slowly into contact with the other terminal of the transformer. The electric current must form a two-inch arc. If this arc is not large enough, the transformer must be replaced.

Short-Circuited Electrodes and Electrode Wires

Finally, the oil furnace burner may be prevented from firing by the presence of one of the two following problems: some electrodes may be short-circuited or even the electrode wires may have suffered a short circuit.

Find Professional Help

These are a few of the possible causes. If none of them proves to be your furnace’s problem, you may want to contact an expert. TalkLocal can put you in contact with several professionals who may be of great help.


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