4 blinking lights furnace error code: Here are 3 simple Yet useful tricks

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Do you see a mysterious code of 4 blinking lights furnace? Furnace problems can be frustrating, but they don’t have to leave you cold. This code, known as the 4 blinking lights furnace error code. It can appear on various furnace brands.

This blog post will guide you through 3 easy-to-follow solutions to your 4 blinking lights furnace issue. We’ll cover common furnace brands like Carrier, Goodman, York, and Coleman, and explain what blinking lights mean for each. Here’s how to fix your furnace!

What does 4 blinking lights mean for a furnace?

The meaning of a 4 blinking light code varies depending on your furnace brand, but it generally means there’s an overheating issue.

  • High limit switch trip: This safety switch shuts the furnace down if it detects too much heat.
  • Blower motor malfunction: You need it to circulate warm air. It might overheat if the fan isn’t working right.
  • Clogged air filter: Clogged air filters hinder proper heat exchange and can lead to overheating.
  • Faulty control board: Sometimes, the control board is faulty and triggers the error code.

Consult a qualified HVAC technician if you encounter this code and prevent tampering with your furnace. They’ll be able to pinpoint the source and make sure your furnace runs safely.

Troubleshooting a 4 Blinking Lights Furnace Error Code

Make sure you’re safe before you start troubleshooting. You should never work with electrical components or gas appliances unless you’re experienced.

You can try these basic troubleshooting steps, but only if you’re comfortable:

Check the air filter:

Furnace air filter
  • Locate the air filter, usually near the furnace blower compartment.
  • Remove the filter and visually inspect it. If it’s dirty or clogged, replace it with a clean, high-quality filter. Refer to your furnace manual for the recommended filter size and type.
  • Reinstall the replacement filter and turn the furnace back on. You can move on to the next step if the issue persists.

Reset the furnace: How to Reset 4 blinking lights furnace?

This is a general guide on how to reset your furnace:

You should always refer to your furnace’s user manual for specific instructions, since it may vary slightly from brand to brand.

Feel free to call a qualified HVAC technician if you’re unsure.

Here are the common steps involved in reset a furnace:

  1. Find the power switch or breaker that controls your furnace. You can find it on your furnace or in your home’s electrical panel.
  2. Turn off the power by flipping the furnace switch or tripping the breaker on the electrical panel.
  3. Wait at least 30 seconds to shut the furnace down.
  4. Reset the breaker or flip the switch to turn the power back on.
  5. Attempt to restart the furnace by adjusting the thermostat and observing if it ignites and operates normally.

If the error code persists, don’t reset the furnace repeatedly. It could damage it more. You shouldn’t tamper with any furnace internal components, as it could be dangerous.

Check for obstructions:

Check the vents and intake grills for any obstructions. Make sure nothing’s blocking the airflow, like dust, debris, or furniture.

Your home’s registers and vents should be open and unobstructed.

Read Also: Goodman Furnace Solid Red Light Issue: Steady ON Or LED Flashes [ Fixed ]

Safety Tips on 4 blinking lights furnace: Know these things

4 blinking lights furnace don’t mess with the furnace’s internals. This could cause more damage.

If the code persists after trying these basic steps, or if you feel uncomfortable at any point, call a qualified HVAC technician immediately. They can diagnose the specific issue and fix it safely and effectively.

It’s only for general troubleshooting, so always prioritize safety and ask a pro if you have any questions or concerns.

Read Also: Yellow Light Flashing On Furnace: What It Means And How To Fix It

What does error code 4 mean on a carrier furnace when it flashes?

For a carrier furnace, a 4-blink error code indicates two potential issues:

4 blinking lights furnace
4 blinking lights furnace

Trips on 4 consecutive limit switches:

Basically, the high limit switch shut down the furnace four times in a row because of excessively high temperatures.

Airflow isn’t enough:

There are several things that could be causing this, including:

  • The evaporator fan motor might not be working right, which leads to insufficient airflow.
  • It’s the difference between the temperature of the air entering and leaving the furnace that may indicate an issue with airflow.

Read Also: DIY Guide To American Standard Furnace Repair: Troubleshooting, Error Codes 31, 13

How do I fix the green flashing light on my furnace?

A green flashing light on your furnace can be concerning, but don’t fix it yourself. Call a qualified HVAC technician to ensure your safety.

A blinking green light can have other causes. A technician can diagnose the problem and ensure the right solution is applied.

furnace repair

Here’s why a professional is your best bet:

  • The first rule is safety: Working with electrical components and gas appliances is dangerous without proper training. Professionals handle these safely.
  • The root cause can be identified by a technician, so you don’t end up spending money you don’t need to.
  • A professional can replace your circuit board, if necessary, with the right skills and tools.

Make sure you get professional help if your furnace’s green light is blinking. They’ll diagnose the problem and get your system going again in no time.

Read Also: How To Relight A Gas Furnace Pilot Light? Have You Tried 4 Effective DIY Steps?

In conclusion, understand how to fix a 4 blinking lights furnace error code and you will avoid the frustration and discomfort of a broken furnace.

These solutions will help you troubleshoot and resolve the issue, so that your home stays cozy and warm during the winter.

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