Blinking Light On Furnaces

The user manual book of the Trane furnace does not give what the blinking light means clearly. The small light in the bottom of the gas furnace is called blinking light. However, you can know about the codes based on the scheme wired.

Sometimes, blinking red light on a furnace will work if there is a bad condition in the furnace. It has a function to give you a sign to help you what happens with your furnace—all the furnaces completed with LED light. 

Furnace Light Blinking 3 Times

Three red flashings indicate a pressure switch opened. It is normal for the furnace. You do not need to spend your money and call the operation system. Check the vent pipe or switch hose.

You can also try to unplug the trip breaker for five minutes and reset or check the hose going to drain. Here, be sure that there are no obstructions. 

Furnace Light Blinking 3 Times
Furnace Light Blinking 3 Times

If you try to find the hose, you will face the container plastic, which two screws, and there is an external hose in the bottom and three hoses in the top. Make sure four hoses are not something makes the obstructions.

Clean a pipe cleaner in four holes. Usually, you will find buildup that makes blockage in container plastic. The last step you reinstall the furnace. 

Another way to deal with three red blinks reset your furnace and cleans the snow off the vent. You have to find a vacuum from the small inducer. When you draw the line of vacuum, it will be okay. Generally, the pressure of the switch is seldom too defective. 

Carrier Furnace Light Codes

Actually, if you are looking for a carrier furnace, you will get it in different sizes and formats use. But the most important, several furnaces have a guarantee limited combustion system, silence operation and display panel electronic. 

Carrier Furnace Light Codes
Carrier Furnace Light Codes

The furnace should be working well in several conditions. Thus, you have to maintain the furnaces. If something bad happened, it would make an error code appearing, and there is a blinking red light on the furnace. But, do not worry. There is a step to solve this problem:

Make sure to check a gas if several 22 on-screen. Cove a valve used clothes clean. But if there is a gas smell, a leak, please turn off the furnace and go away from your house. Next, contact the gas company as the next act.

If the furnace appears code 23 or 33 on the control panel, turn off and unplug the furnace and examine the tube pressure.  The third step is checking the furnace to be sure there is not dirt. The most important thing to do is to call the carriers. It would help if you had them solve your problem with the furnace. 

Lennox Furnace Light Codes

There is a Lennox furnace model that has internal control with LED. There is two LED light to solve code in a flash pattern. The first problem perhaps happens when both of the LED lights off. It means there is a problem. When LED number one is steady but LED number 2 flashing slow, it means problem-related to switch. On the other hand, it means the main power of polarity is reversed. 

Lennox Furnace Light Codes
Lennox Furnace Light Codes

If LED number 1 and number 2 make a flashing slow, there might be three problems. The first is the furnace not connected with the ground properly, the second one is the voltage under 75 volts, and the last is the connector is not attached to the board. 

If you face any problem like LED code if the Lennox is not heating or cooling. The fast flashing change in both LEDs means the ignitor has failed or the circuit opened.

The ignitor of the meter is properly between 10.9 ohms and 19.7 ohms. If you also get air blower and furnace are not responding to heat and cool. If LED number 2 on but LED number 1 flashes slowly, it is about the wired does not connect or open condition. 

The last is when LED number 1 off but LED number 2 has a flashing too slow, the furnace is not connected, and the wired is wrong. But several cases, the code means the air blowers are not well working or dead. 

If the furnace is good working, the LED light will show the low code, but if it is, LED number 1 has to flash too slow, whereas LED number 2 will be fast. Check the flame rod. Maybe it is dirty or has a wrong place on the burner. 

American Standard Furnace Blinking Red Light

If you have an American standard furnace, it is blinking red light. It is not something new because the entire furnace is normally working. When the furnace blinks in, four blinking and pause and three blinks and pause again, it is steady, not an error code.

Perhaps, for another standard, the blinking red light on the furnace is dangerous or bad things, but sometimes it is not as well as the American standard furnace. 

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HomeTips is an experienced author and expert technician. With years of practical experience in the field authored several informative articles on various aspects related to home improvement, including installation, maintenance, and repair.