If your home has an older furnace, you may wonder whether or not it is time to replace it with a new one, especially if you have noticed a marked increase in your energy bills. If so, look for the following signs that your old central heating unit is starting to go bad.
Rooms in Your House Are Different Temperatures
One of the more subtle signs that your heating unit is going bad is a noticeable difference in temperatures in each of your home's rooms. If your furnace has always kept your home equally warm, these varying temperatures are an indication that it is no longer able to do its job.
If you have noticed a difference in the warmth of the rooms, consider where each room is in relation to the furnace's location. You will probably find that the rooms closest to the heater are much warmer than the ones on the other end of your home. This difference means that the unit is no longer able to thoroughly force the air so that it reaches every room.
Heater Never Seems to Cut Off
Another indication that your heater is failing is that it never seems to cut off. Whether this problem stems from trying to evenly warm the home or from a bad thermostat, the furnace runs continuously, driving up your energy bills without providing adequate warmth. Before you jump to the conclusion that the heater itself is bad, perform a couple of simple tests to see if the problem lies with the thermostat. First, turn off the thermostat completely, and wait to see if the furnace shuts off.
If it does shut off, the thermostat is working. However, if the furnace does not shut off, or if it cycles from off to on, replace the thermostat with a new one. You can find these at home improvement centers that contain easy instructions on how to do it yourself. If you do change the thermostat with no change in the furnace's behavior, try turning the new thermostat all the way up. If the heater continues to run, there is a good possibility that motor is failing and may break down soon.
If your heating unit is showing either of the above signs, it may be time to have it replaced with a new one. Contact a heating unit installation service for more information on selecting the best unit for your home.