An inefficient heating system could cost you hundreds of dollars each year, and sadly, most homeowners don’t even know they are wasting this much money because they assume as long as the heater is producing heat, it’s working 100 percent. To know if your heating system is being inefficient, here are four things you will want to look out for.

1. High Gas Consumption

Chances are your utility company allows you to view your bills from a few years ago, and if you don’t have an online account, consider creating one to be able to compare the usage from today to a year ago. If you’re noticing your bill is at least 15 to 30 percent higher, then could be a sign your system is becoming inefficient. Unless you’re raising your temperatures, there’s no reason for your bill to increase this much.

2. Your Pilot Light

When your gas furnace starts up, you will notice a pilot light if you peek through the vents. A healthy system will have a steady blue color, but if your system is inefficient, this color can change. If you notice the flame is either yellow or it’s flickering, this could be a serious problem. These colors and signs often mean your system is producing high levels of carbon monoxide, and if you suspect this is the case, you will want to turn off your furnace immediately and call a professional.

3. Too Many Calls

It’s okay to call the professionals here and there, but if you’re calling at least three to four times per year, you may be better off investing in a new system. Most systems will need an occasional repair; however, if your system has had at least four repairs north of $200, then it has probably reached the end of its life. Experts such as those at Universal Refrigeration, will tell you it may be time to call the professionals if your system is older than 15 years.

4. Odd Noises

Pay close attention to the furnace when it boots on. Do you hear any popping or banging noises? If so, it may be a sign the furnace is on its death bed. A healthy furnace will be relatively quiet and won’t wake you up during a deep sleep.

If any of these signs apply to you, then it’s time to call a professional before your heater kicks the bucket on a 10-degree night. Investing in a new system or even having a simple repair performed could save you a lot more than you think.