Today's furnaces frequently come with an LED light installed on the circuit board to help you figure out what's going on with the system. You might wonder what a blinking red light means on a different model of furnace. We’re here to help and have gathered information from experts to determine what a blinking red light means. For Lennox, Trane, Goodman, York,
Bryant, Rheem, and Carrier furnaces, the red light on the heater communicates with you using the same principle of Morse Code. The number of times the light flashes corresponds to a specific code that denotes a specific issue. It is also communicating that basic HVAC maintenance is needed. This article will explain how you read the red light codes for each furnace, how to interpret the codes and figure out what's wrong with your furnace. So keep reading! Each manufacturer has its own set of codes that describe the red blinking light on the furnace, which will be covered here. LennoxLennox furnaces have two LED lights that flash red at different frequencies, and the meaning will be discussed below:
Trane
Goodman
York
BryantThe Bryant furnace uses a sequence of LED lights or a 2-digit code with short and long light flashes. The first digit of the two-digit code is indicated by the short flashes, and the second digit is indicated by the long flashes.
Rheem
CarrierWhen working with a Carrier furnace, keep an eye on the number of times the LED light flashes and the speed with which it flashes. The short flashes decode the initial digit while the long flashes represent the second digit.
ConclusionWhen you see a blinking red light on a furnace, your system is sending you an error code. The lists above can help you narrow down the possible causes of your furnace not working properly. If you can't decode the blinking red light, you should call an HVAC technician to help identify the problem. Check out these related blog posts for more information. Do Electric Furnaces Need Yearly Maintenance? How To Clean An Electric Furnace? How do I reset my Trane furnace?Locate the switch for your thermostat in the breaker box. Flip the switch to the OFF position for 20-30 seconds. Return the switch to the ON position. The reboot process will take several minutes to complete.
What does the red light mean on my furnace?When lit, this red light, also called a lockout light, indicates that a safety mechanism on your furnace has caused a shutdown because it has detected a problem or recognized a fault. (Note: Not all furnaces have this red light. Some have a red reset button that does not light up.)
What does 3 blinking red light on furnace mean?Have you ever looked at your furnace and thought what do 3 flashes on American Standard furnace mean? This error occurs when the combustion air pressure switch that monitors the flow of air through the vent system fails to close while the induced draft motor is operating.
Why is there a red light on my Trane thermostat?If you notice a red light coming from your thermostat during regular operation, this usually means that the outdoor unit shut itself off due to a problem and is locked out from normal operation. When this happens, the outdoor unit sends a signal to the thermostat to let you know there is a problem with the unit.
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