Furnace Repair: 3 Common Problems & How to Fix Them

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Having a gas furnace in your home is a great way to heat your home in a more natural method than with a central heating system. If you are having problems with your furnace, it might be due to one of the three following common issues.

1. There is No Heat

One of the most common complaints with a gas furnace is that it is not producing any heat. This may be caused from any number of things, such as the thermostat being set too low or not working at all, having a blown fuse or tripped circuit breaker, or the gas control valve being closed. You might also not get any heat from your furnace if you have a problem with the pilot light, or with the electronic ignition.

If you aren't getting heat, first check to be sure the thermostat is turned up high enough and that it is working properly. Then, check the circuit breaker or fuse box, and make sure the pilot light is currently lit. If these are all working properly, you may need to contact an HVAC repair professional to check the intermittent pilot ignition system or hot surface electronic ignition.

2. The Pilot Light is Out

The easiest problem to fix in regards to your gas furnace is if the pilot light is out. You will know it is out by the furnace not turning on, or it not producing enough heat. The pilot light can go out if you have a problem with the thermocouple as it can shut off the gas supply. If this seems to be the problem, you can replace it yourself or call in a professional such as Maryland Oil Company.

In other cases, the pilot light just needs to be lit again. The light can go out from a heavy wind or draft, or from dirt in the gas tube. The type of furnace you have determines how to light it, so check your owner's manual for detailed instructions.

3. The Furnace is Noisy

If your gas furnace turns on and gets hot, but it is noisy, this is something you should be able to fix. There are several noises you might hear coming out of a furnace, including a rumble sound that is from problems with the burners being off, a squealing noise that is due to the bearings, motor or belt, or a lower rumble noise from the gas burners needing to be cleaned.

Possible repairs for a noisy gas furnace include loosening or tightening the belt, replacing the belt, adjusting the pilot light, or having the burners cleaned or adjusted. The burners should not be cleaned by yourself, but by a professional for safety purposes.