Bryant Furnace Codes Explained – What Each Code Means and How to Fix It

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Knowing the right furnace codes and how to recognize them can help you catch problems before they get out of hand. Understanding what each code means, and how to fix it, can save you money down the road. If your Bryant furnace is making strange noises, displaying lights you’ve never seen before, or not turning on at all – one of those codes may be why. A busted furnace isn’t just a minor nuisance; it’s also a safety risk. A broken thermostat or control board could lead to carbon monoxide poisoning in the home if left unrepaired long enough. That’s why we’ve compiled this list of common Bryant Furnace Codes with explanations and solutions for repair. Keep reading to learn more!

Code 1: Furnace Will Not Turn On

This is, unfortunately, a really common problem. A furnace won’t turn on when it senses a problem. It could be due to a clogged filter, but it could also be a more serious issue. The first thing to check is your circuit breaker. If your breaker is flipped to the “off” position, flip it back to the “on” position and see if the furnace starts. If it doesn’t, the problem is most likely with the thermostat. The thermostat is what kicks the furnace on when the temperature drops in the home. If the furnace still won’t turn on, check the thermostat. Make sure it isn’t set above its maximum temperature setting, and that it is properly wired to the furnace. Also, check the fuse box and make sure the thermostat’s fuse is still intact and undamaged. If the fuse is blown, replace it with a new one. If the thermostat has been damaged and can’t properly turn the furnace on, you’ll need to replace it.

Code 2: Furnace Will Not Turn Off

The furnace should turn off as soon as the house reaches the desired temperature. If the furnace doesn’t turn off when the thermostat is satisfied, it could be due to several different issues. First, make sure the thermostat is properly wired to the furnace. Next, check the thermostat’s settings. The furnace may stay on because the thermostat is set too low. If you notice the furnace never turns off, check the circuit breaker. If the circuit breaker is flipped to the “off” position, flip it back to the “on” position and see if the furnace turns off. If the circuit breaker is fine and the furnace still won’t turn off, it could be due to a faulty thermostat. You’ll have to replace the thermostat with a new one.

Code 3: Furnace blower will not turn on

If the furnace is running but the blower isn’t, the problem is most likely with the thermostat. Blowers should turn on when the furnace first comes on. If the furnace is running and the blower is not, the thermostat is likely to set to “heat” instead of “cool”. Check the thermostat’s settings. If the thermostat is not set to “cool”, reset it. If the thermostat is properly set to “cool” but the blower still won’t turn on, check the circuit breaker. If the circuit breaker is flipped to the “off” position, flip it back to the “on” position and see if the blower starts. If the circuit breaker is fine and the blower still won’t turn on, the problem is most likely with the control board. You’ll have to replace the control board with a new one.

Code 4: Furnace flame is out

If the furnace flame is out but the blower is still running, the problem is most likely with the air delivery controller (ADC). The ADC is the part of the furnace that controls the flame. If the flame is out and the AD is still running, you’ll have to replace the AD with a new one. If the flame is out and the blower is not running, something in the furnace has sparked a circuit breaker. You’ll have to replace the broken component with a new one.

Code 5: Furnace temperature control is not working properly

If the furnace is running but the temperature control isn’t working properly, it may be because the sensor is broken. The sensor reads the house’s temperature and sends that reading to the thermostat. If the thermostat sees a reading other than what it’s programmed for, it sends a signal to the furnace to kick on. If the sensor is broken, the furnace will turn on but the thermostat will not reach its desired setting. You’ll have to replace the sensor with a new one.

Code 6: Furnace sensor is broken.

If a furnace sensor is broken, it will not send the proper reading to the thermostat, which will then not be able to adequately regulate the house’s temperature. If any of the sensors are broken, you’ll want to replace them all. Sensors should be replaced every five to seven years.

Code 7: Burner Or Flame Sensor Is Broken

If the burner sensor or flame sensor is broken, it will not be able to properly monitor the furnace flame. The sensor should be replaced every five or seven years depending on which one it is. If the sensor is broken, the furnace will not be able to operate properly.

Code 8: Electronic Control Board (ECB) Malfunction

If the electronic control board (ECB) malfunctions, the furnace will not be able to run properly. You’ll have to replace the ECB with a new one. An ECB should be replaced every five to seven years.

Code 9: Electronic Air Delivery Controller (EADC) Malfunction

If the electronic air delivery controller (EADC) malfunctions, the furnace will not be able to run properly. You’ll have to replace the EADC with a new one. An EADC should be replaced every five to seven years. Final Thoughts As you can see, furnace troubles can be really serious. That’s why it’s important to learn how to recognize the different codes your furnace may display, and how to troubleshoot them. You’ll be able to catch and repair most issues before they become serious and cost you a lot of money.