Nobody enjoys going into a dark basement when there are spine-chilling sounds coming from the oil furnace. Here are some likely sounds that might be making the noise. If you hear a loud ‘boom’, it’s usually caused by a delayed ignition. An Heating, Ventilation, as well as A/C company should be called instantaneously since the cause could be an explosion from gas building up in the oil furnace chamber. The same sound occurs when too much gas builds up when lighting a gas grill. There are several explanations for why ignition is delayed in a gas oil furnace. One is that there is a high air-to-gas ratio, making the ignitor hard to light. Another cause might be insufficient amounts of gas due to low gas pressure. Finally, the burners could be clogged with debris, worn down, or otherwise compromised. Another sound coming from the oil furnace is more like a house-shaking rumble as the oil furnace completes a single of its heat cycles. This cause is genuinely due to the fact that oil continues to burn in the combustion chamber after the burners shut off. Again, call a certified Heating, Ventilation, as well as A/C repairman instantaneously. This complication can lead to carbon monoxide gas being released into the home, which is deadly. If the oil furnace makes a loud rattle when it clicks on, carbon monoxide could also be the culprit. The oil furnace may have a cracked heat exchanger, which is the largest cause of carbon monoxide leaks. Next are squealing or grinding noises, the cause which more than likely is a loose blower belt. Or, the motor bearings could be failing as well as need to be upgraded or oiled. A clicking noise is normal when a oil furnace first turns on, which is from the ignitor. Finally, a buzzing noise is genuinely the result of something that’s loose in the oil furnace transformer.