It is very important to have proper heat in the winter. During cold evenings, you can sit inside and watch it snow. Perhaps you will simply enjoy a warm evening at home with loved ones.
You may notice your Comfortmaker furnace blowing cold air. You will need to investigate the matter, right away. Here are some things to check before you call a technician.
Go down to your heat system and have someone turn the thermostat up. Is the burner of the unit coming on and getting hot? Does everything seem fine? Is the blower motor running and the burner off? It there is no flame, you may wish to check some things.
Checking for diagnostic codes
Most newer furnaces are electronic in nature. They have a control panel with the ability to diagnose most problems that occur. There are two basic ways to get the diagnostic codes.
Do you still have the manual that comes with the unit? You should have detailed information on your control panel. It should also have a code chart. This will tell you what is causing the problem.
You may also look on the unit. It may be on the blower panel. It may be inside a panel. You should find instructions for retrieving and understanding the diagnostic codes.
In most cases, you will receive flashing lights. They may also have different colors. A slow flashing green light may mean normal conditions. A red one may mean failure. A red light that flashes twice could mean a stuck pressure switch.
When you receive these codes, it can lead you in the right direction. The problem may be simple and easy to fix. On the other hand, you may need professional help.
A burner flame
Your burner may be lighting just fine. For some reason, the air may feel slightly warm. The problem may be simple. You may need to check to see if the blower motor is on the right speed.
In the warm weather, you need high speed to blow cold air. In cold weather, you need slower speeds to move the warm air into your house. It may simply be a matter of lowering the blower speed.
Check with your owner manual. Some models have different methods for changing blower speed. You may not need to remove the blower panel. In some cases you will need to remove the panel and change the position of a wire or two.
There is also a possibility that a limit switch is not properly working. You will receive a trouble code when this happens. If you know what you are doing, you can replace the switch. If not, have someone with training and experience, take care of it for you.
You may notice your Comfortmaker furnace blowing cold air. The first thing to do, is check to see if the burner is lighting. Next check the trouble codes. This may tell you all that you need to know.
In some cases, the burner will light, but the air will not feel very hot. You may need to change the speed on the blower motor. You need high speed for summer and lower speed for winter.
Originally posted 2010-09-13 12:58:21.