Troubleshooting Oil Furnaces and Oil HeatersCleaning or replacing filters is a job anyone can do, and often it's the reason an oil furnace isn't performing at peak levels. Use this chart to see if the problem with your furnace might be fixed with a filter change.
|Furnace won't run
||1. No power.
||1. Check for blown fuses or tripped|
circuit breakers at main entrance
panel or at separate entrance panel;
|2. Switch off.
||2. Turn on separate power switch on|
or near furnace.
|3. Motor overload.
||3. Wait 30 minutes; press reset button.|
Repeat if necessary.
|4. No fuel.
||4. Check tank; if necessary, refill tank.|
|5. Fuel line blockage.
||5. Clean oil filter and oil pump strainer.|
If problem persists, call a
|Burner won't fire||1. No fuel.||1. Check tank; if necessary, refill tank.|
|2. No ignition spark.
||2. Press reset button on stack control;|
if necessary, clean stack control.
If no result, call a professional.
If furnace has electric-eye safety,
clean safety; if no result, call a
|Not enough heat
||1. Thermostat set
|1. Raise thermostat setting 5°.|
|2. Air filter dirty.||2. Clean or replace air filter.|
|3. Blower clogged.||3. Clean blower assembly.|
|4. Registers closed
|4. Make sure all registers are open;|
make sure they are not blocked by
rugs, drapes, or furniture.
|5. System out of
|5. Balance system.|
|6. Blower belt loose
|6. Adjust or replace belt.|
|7. Burner dirty.||7. Call a professional.|
on and off
|1. Air filter dirty.
2. Oil filter dirty.
3. Motor and/or blower
|1. Clean or replace air filter.|
2. Clean or replace oil filter.
3. If motor and blower have oil
| needs lubrication.
|4. Blower clogged.
||4. Clean blower assembly. |
|5. Stack control faulty.||5. Call a professional. |
||1. Blower control
||1. Reset thermostat from ON|
|stop running||set wrong.|| to AUTO.|
|2. Limit switch set
|2. Reset limit switch.|
||1. Access panels loose.
||1. Mount and fasten access|
|2. Belts sticking, worn,
|2. Spray squeaking belts with fan|
belt dressing; replace worn
or damaged belts.
|3. Blower belt too
loose or too tight.
|3. Adjust belt.|
|4. Motor and/or blower
|4. If motor and blower have oil|
|5. Burner dirty.||5. Call a professional.|
Oil filters should be changed twice a year. Find out when and how to do it on the next page.
For more articles on home repair, check out the following links.
- Furnace Maintenance: Save yourself time and money by learning the steps to keep youor furnace in prime condition.
- Major Appliance Repair: If the furnace isn't the only thing in your house on the fritz, you can learn how to fix other machines in this article.
- Small Appliance Repair: Once you've tackled the furnace, a toaster or blender seems like child's play. Find out how to fix them here.
- Thermostat Maintenance: To make sure there's actually a problem with your heating system, you may want to check the thermostat, too. Learn how to calibrate a thermostat.