Squeaks, rattling, and rumbles are a sign that there is something wrong with your natural gas furnace. If you experience any of these problems, you will want to investigate the cause of the odd noises so that you can have your natural gas furnace repaired and so that you can perform some maintenance tasks yourself.
The Furnace Belt
Problem with your natural gas furnace's belts can cause strange noises for your furnace. The fan belts occasionally need to be adjusted. Belts that need to be replaced will be cracked or frayed. Fortunately, it is not expensive to replace a belt. Tension the new belt after you have installed it so that it deflects ½ to ¾ of an inch.
Blower wheels can sometimes get out of balance, which can lead to odd noises. This happens when the blower wheel becomes dirty or as the blower wheel ages. The wheel will need to be cleaned periodically. Fortunately, it is permanently lubricated and will not need any maintenance beyond a simple cleaning. However, this should be done by a furnace technician because there are things that can go wrong that could cause problems for the furnace. For example, the capacitor could be attached to the housing and would need to be discharged.
The Air Ducts
If your furnace keeps creating a squeaking noise, this can come from an air leak. The air leak is usually in one of the ducts. The parts of the duct work that are the most likely to develop air leaks are on the joints. The leak can often be sealed up with putty or a piece of tape.
When the burners are clogged, this can create noise in the furnace. This results from the burners not being cleaned properly. If you completely shut off the furnace and clean the burners, you can eliminate this problem. When you remove the burners, it will also be a good time to check them to make sure that they are functioning properly. Look for signs of rust and holes. The burners can simply be rinsed with fresh water to remove dirt and debris and should then be dried.
Generally, if your furnace creates a strange noise, you will want to contact a furnace repair technician. But if you understand what is wrong with the furnace, you may be able to perform some of the repairs yourself and you will also be able to help guide the furnace repair technician, such as from Anytime Plumbing Services, toward the cause, allowing the furnace to be repaired more quickly.