what does blinking red light on furnace mean

by Dr. Kennedy Dooley II Published 4 years ago Updated 2 years ago

What Does A Red Blinking Light On Your Lennox Furnace Mean?

Blower Restarting after a System Reboot. When your furnace’s power is restored, its blower often starts up. ...
Combustion Failure, Fuel, or Fault Proving. ...
Failures of Pressure Switches and Inducers. ...
A High Limit and a Rollout Switch. ...
Furnace Lockout. ...

Full Answer

What does the blinking red light on my furnace mean?

When is a Blinking Furnace Light Dangerous?

Gas smell around the heater
A beeping carbon monoxide sensor
Overheating

What to do if your furnace light is flashing?

– Turn off the power to the furnace at the circuit breaker. … – Lift up the blower compartment cover to access the blower wheel and blower motor. – Look for a small red or yellow button on the side of the blower motor. – Press the reset button down if it has popped up. Why is my furnace blinking 3 times? Three LED flashes.

Why is the red light in my furnace blinking?

Turn off the power to the furnace at the circuit breaker. The circuit breaker is clearly marked.
Lift up the blower compartment cover to access the blower wheel and blower motor.
Look for a small red or yellow button on the side of the blower motor.
Press the reset button down if it has popped up.

What does the red light on my oil furnace mean?

Two (2) flashes: Mean the furnace is likely blowing cold air because it’s dropping the flame, i.e., the flame is feeble.
Three (3) flashes: Indicate a problem with the pressure switch. ...
Four (4) flashes: Indicate an issue with the limit switch. ...
Six (6) flashes: Are a sign that the furnace has a problem with polarity or grounding. ...

More items...

Should My Furnace Light Be Blinking?

Yes, if it’s ON, it will most likely blink. Most furnaces blink even if they’re in perfect working condition, perhaps so you can relax knowing that everything is fine.

Typical Furnace Error Codes

As you can tell from the above discussion, the biggest issue with the flashing furnace light is that it can mean anything literally. It could be a gas supply issue, a pilot light issue, an electrical power issue, or even a matter that requires safety cutoff.

Reasons the Light on Your Furnace is Blinking

The light on your furnace blinks for two main reasons. First, it blinks to alert you of an ongoing issue within the furnace. This way, you can take proper steps to stay safe and get the issue resolved.

What to Do if the Furnace Light is Blinking

You need to do two things when your furnace begins to blink. First, make sure you and everyone else within the home are safe. This is critical as sometimes the blinking LED lights can be accompanied by gas leaks. Make sure everyone is safe,

How to Restart Your Furnace Pilot Light

If all you need to do to fix the issue is to restart the issue, you’re in luck. Restarting the furnace means re-booting the system so that it self-resolves the ongoing problem.

When is a Blinking Furnace Light Dangerous?

The blinking furnace light by itself isn’t dangerous. Unfortunately, sometimes the light might be accompanied by unwanted incidents that make the situation unsafe. You need to take extra caution if you notice the following;

What Does a Blinking Red Light on a Furnace Mean?

Generally speaking, this means there is a problem either internally within the furnace system or with the thermostat it communicates with.

Popular Furnace Brands and Blinking Red Lights

Each furnace exhibits error codes unique to the machine itself. Decoding what your furnace is trying to tell you is essential to finding the right fix.

Wrapping It Up

If your furnace is blinking a red light, try some of the tips and tricks above to fix it!

Why is my furnace light blinking?

If it is glowing solid amber or yellow, then that means everything is fine, and you have a happy furnace. But if you see your Furnace Light Blinking, that’s when your furnace is trying to tell you something.

What does it mean when your furnace is not receiving power?

If you are looking at your furnace and do not see a red light at all when you know it should be on, that means your furnace is not receiving power. Check your circuit breaker box to see if you tripped the breaker for the furnace.

How to reset a furnace that is locked out?

You can reset your furnace by cutting the power to the furnace at the breaker. Leave it off for a few seconds, and then turn it back on. Like your computer, sometimes you just need to turn it off and back on again.

What is a pressure switch in a furnace?

Inducers and pressure switches are parts of the furnace that make sure the furnace is venting unwanted gas. Although this is best left to a professional technician to deal with, check to see if your chimney or exhaust is blocked first. That may solve the problem.

Why is my furnace light blinking?

If you notice a solitary light flashing slowly and the other blinking rapidly, your furna ce could be having a low flame signal. This can happen even when your heater is running like it should. It indicates the flame sensing rod could have build-up or in the bad area on the burner. Similar Asks.

Why is my oil furnace turning red?

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.

Why is my thermostat red?

Thermostat red light flashing or stays on: When the thermostat light (Emergency Heat Light) is flashing or on during normal operation (whether in the cooling or the heating mode, but not the Emergency Heat mode), this usually indicates that the outdoor unit is "locked-out".

How do I reset a furnace motor?

Lift up the blower compartment cover to access the blower wheel and blower motor. Look for a small red or yellow button on the side of the blower motor. Press the reset button down if it has popped up.

What Does Blinking Light on a Furnace Mean?

You will find a little red light on your furnace. If the light glows solid, it means your furnace is working fine. But if it starts blinking, it means there is something wrong with it. Look closely, and you will notice an error code.

Blower Running After Power Up

Usually, when power gets restored to your furnace, your blower will fire up, and you will see an error code. It happens at times, and you do not need to worry about it. Your furnace should start soon.

Pressure Switch and Inducer Failures

Every furnace has a pressure switch and inducer. The draft inducer motor removes gases produced during the combustion process from the heat exchanger. The pressure switch monitors the draft inducer motor to check if it is removing the gases properly.

Furnace Lockout

A furnace lockout occurs when your furnace tries to fire multiple times but fails to ignite. To resolve the problem, reset your furnace by cutting the power supply at the breaker. Leave your furnace off for a few seconds, and then turn it back on.

Gas, Proving Fault or Ignition Failure

If you are getting a code that indicates flame failure, problems with the gas, or ignition failure, check your flame sensor to see if it is dirty. A dirty flame sensor may not detect the flame even when there is one. Clean your sensor gently with light grit sandpaper.

High Limit Switch & Roll Out Switch

Both the high limit switch and roll out switch detect heat. The high limit switch monitors the temperature inside the heat exchanger. The roll out switch detects signs of excessive heat and shuts the furnace down to prevent a fire from starting if it overheats.

How do you read a furnace error code?

Although furnace error codes differ between brands, all the most popular furnace brands use a system of blinking lights to communicate error codes. To read a furnace error code, locate the LED light and note its blinking pattern. Be sure to count how many times the light flashes and to note how quickly it’s blinking.

Trane Furnace Error Codes

Trane products, including furnaces and air conditioners, are some of the most reliable on the market. However, that doesn’t mean they don’t have problems.

Amana Furnace Error Codes

Amana HVAC systems are also highly-dependable and efficient. Similar to Trane furnaces, Amana furnaces use a blinking red light to signify an issue with the unit.

Lennox Furnace Error Codes

Have a Lennox furnace at home? The Edmonton heating services experts at ProSolutions are familiar with the Lennox brand – and we’re here to help.

Ducane Furnace Troubleshooting Codes

Ducane furnaces are made by Lennox and are another popular choice among Edmonton homeowners. Like Lennox, Ducane furnaces use flashing LED lights (red and green) to communicate error codes. However, a green LED is only used to specify furnace error codes when there is a demand for high heat.

Goodman Furnace Fault Codes

Goodman furnaces come highly recommended by furnace specialists in Edmonton. The brand is well-built and reliable. But, as with any furnace, Goodman units can experience issues – especially since cold Alberta winters can take such a toll on these types of appliances.

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