When you start hearing strange noises from your furnace, it might be having problems, some which you can figure out yourself while for some you may need to seek professional help to be able to figure them out. Some of the noises might of no cause for concern, but there are some you should never ignore since they could be indicators of serious problems in the system. The following are the top 4 strange noises in your furnace that you should be checking.
These sounds from a furnace are usually not a cause for concern. They mostly occur when the unit has not been in use for a while and they could just be indicators that the unit is warming back up. After the furnace has run for a few minutes, the noise may disappear. But if you notice that the chirping sounds are still on even after then unit has been operational for a while, or the sounds continue growing worse over time, you should not hesitate to call a furnace repair technician to check your unit. Usually, when the chirping sounds continue without stopping, it could be an indicator that a belt needs replacement.
Rattling sounds in a furnace can occur when objects such as leaves and sticks are stuck in the outside part of the condenser unit. It is very important to always ensure that the unit furnace is free of debris to prevent any damage to it. Rattling noises can also be caused by a loose fan or a motor that is worn out. If you hear these noises, you do not need to call a repair technician immediately because sometimes the sounds are short-lived. But if the sounds continue getting worse with time, it could be a sign that the unit is beginning to fail, so you will need to contact a licensed furnace repair technician to inspect and correct the problem.
If you hear squealing sounds from your furnace, it is important that you take action immediately. They are usually indicators that the outdoor fan is failing. You can try fixing them on your own by replacing the bearings depending on the make and model of your furnace. If the squealing sounds still occur even after replacing the bearings, you might need to replace the whole unit that comprises the fan and motor. If you are not sure about how to do the replacement, make sure to seek professional help.
Clicking sounds in your furnace should also cause you to seek immediate help from a furnace repair technician. Clicking sounds usually occur when the flame sensor is dirty or in a bad condition. If that is the case, you can just clean the flame sensor using a piece of emery cloth. The clicking sounds may also occur when the ignition is not putting out the signal for the main gas valve to open. You will need to call a service company to replace the module if that is the case.