Oil furnaces have their perks: they are energy efficient, safe, durable, and cost-effective. Just like other heating systems, they develop a myriad of problems that you must diagnose and fix for your appliance to continue functioning optimally.
Here are the most common oil furnace problems as given by oil burner repair service professionals:
Failure of the fan starting
When the furnace isn’t starting, first take a look at the thermostat and ensure its set on heat, and the setpoint is above the average room temperature. You should then turn the fan from fan to auto.
When the fan isn’t coming on, check the fuse or breaker. If the fuse is blown or the breaker has tripped, check the furnace wiring for signs of damage then reset the breaker.
If the breaker hasn’t tripped, the problem might be with the primary control, fan timer control, thermostat, blower motor, or run capacitor.
You may find the blower running, but the burner doesn’t come on. In such a situation, check the reset button on the primary control. If the red reset button is sticking up, push it down, and release it.
Failure of the burner to operate
When you have this problem, the first place to check is whether the unit has fuel and if it’s getting electrical power. You also should check whether the thermostat is set too low. The problem can also come about if you have a control problem or the furnace is off-limit.
For you to fix the problem, add more fuel. Also, check for a blown a fuse or circuit breaker and fix them. The wires might also be the problem.
Carefully trace the path of electricity and see where it’s getting lost. Check to see whether the filler/ductwork is restricted or blocked. Also, confirm that the motor/blower is operating correctly.
Burner cycling too often
There are several possible culprits for this problem: improper firing rate, heat anticipator set incorrectly, inadequate duct system, blower speed set too high, limit set incorrectly, and leaving the house doors and windows open.
For you to fix the furnace problem, adjust the heat anticipator, and measure the current and set it according to the temperature recommended by the manufacturer. You also should survey the duct system and make the necessary changes.
Set the blower so that it achieves the temperature recommended by the manufacturer and close the doors and windows.
An improperly functioning furnace produces rattling, knocking, and squealing noises. The sounds signify problems with your appliance. Possible causes of the noises include:
- Air in the lines
- Poor belt tension
- Worn-out belt
- Dirty oil burner
- Loose access panels
- Problem with the motor bearing
- Blocked air
- Poorly set pilot light
Unless you have the necessary skills, avoid trying to diagnose the issues by yourself. The best way out is to hire a furnace expert to look into the problems and fix them.
Odors and fumes
Since the furnace is powered by oil, it’s common for it to produce some fumes, but if the fumes are excessive, you have a problem in your hands you must address as soon as possible.
Unusual odors and fumes come about due to a partially plugged nozzle, failure of the furnace to have proper end cone, poor adjustment of the burner, cracked heat exchanger, delayed ignition, hindered combustion air, and storing items too close to the furnace.
For you to fix the problem, you must clean or replace the nozzle, replace the end cone, adjust the burner, clean the furnace, undertake a combustion analysis to find out what is preventing effective air combustion, and move items that are too close to the furnace.
You can do some of these things. For the things that are beyond your capability, ask a furnace service Long Island professional to give you a hand.
Furnace burning too much fuel
Your furnace will burn too much fuel when you are using the wrong nozzle, the blower needs lubrication, you have poor ductwork, using a wrongly sized furnace, or you have pressure originating from the oil pump.
Possible solutions to the problem include: inspecting the furnace and cleaning it, replacing the nozzle with a better fit, and inspecting the ductwork for signs of leakages and fixing them.