Honda Accord Rear Defroster Not Working – Causes And Fixes

When the rear defroster in your Honda Accord fails, it reduces visibility and safety while driving. Identifying the underlying issue and implementing the necessary fix will restore functionality. Bad fuses, damaged heating elements, broken connections, and electrical problems are all common causes. You can get your Honda Accord’s defroster working again with some troubleshooting and repairs.

Checking The Fuses

Checking the fuses is the first step in diagnosing a broken defroster. Fuse #14 (40A) and #2 (30A) are the two most important fuses to inspect in the under-hood fuse box. Fuse #2 is unique to the EX and EX-L models. Check fuse #30 (7.5A) in the under-dash box as well. Replace any blown fuses with new ones of the same amperage. If a blown fuse was the source of the problem, this simple fix will restore functionality.

Inspecting The Heating Elements

If replacing the fuses does not resolve the problem, inspect the heating elements on the rear window. Examine the area carefully for any visible cuts or damage. In addition, look for areas that appear abnormally dark, as this may indicate a break in the heating element. A break will obstruct the proper flow of electrical current.

Honda Accord Rear Defroster are Not Working
Honda Accord Rear Defroster are Not Working

Sand the damaged area carefully so that the conductive silver paint will adhere. Allow for two coats of paint to dry between coats. This should repair the element’s break. If the damage is severe, the entire heating element may need to be replaced. For the best results, consult a technician.

Checking Electrical Connections

Loose electrical connections are another possible cause of a non-functional defroster. Each side of the rear window on Hondas has a power plug that connects to the heating elements. Check that both plugs are completely inserted. Wiggle the connections to see if they are loose. If it’s loose, push in firmly until you hear a click.

Examine the plugs and sockets for dirt, corrosion, or damage that could result in poor contact. As needed, clean with electrical contact cleaner or replace damaged parts. Power must reach the heating elements through proper electrical connections.

Resetting The System

If the troubleshooting steps listed above do not solve the problem, try resetting the defroster system. The procedure will remove any anomalies and re-calibrate the system.

To begin, turn the ignition to “ON” without starting the engine. Turn on the rear defroster and leave it running for 10 minutes. This gives the grid lines time to warm up and reset.

Then, turn off the defroster and start the engine. Allow it to idle for 10 minutes to allow the controller module to reset. These simple steps may be all that is required to reactivate your Honda’s rear defroster.

Electrical System Issues

The issue with the rear defroster could be in the electrical system itself. Control module, switch, or wiring issues can all prevent operation. Strange noises when using the defroster could indicate an electrical problem.

Honda Accord Rear Defroster is Not Working
Honda Accord Rear Defroster is Not Working

To begin, inspect all wiring for loose, damaged, or disconnected wires. Repair or replace any damaged wiring. If the wiring is correct, the controller module or switch may be defective. Allow a technician to diagnose the specific defective component and recommend repair or replacement. Resolving the electrical issue will return the system to normal operation

Frozen Component Issues

Components such as the heater core or blower motor can freeze in cold temperatures, causing the rear defroster to malfunction. Turning the defroster on high for an extended period of time can assist in thawing the frozen component. Try directing hot air at the problematic component as well.

Inspect the sealed units and gaskets for any cracks or deterioration that allows moisture intrusion to prevent future freezing. Replace any faulty seals or gaskets to keep components protected from the elements. Proper maintenance helps to avoid frozen parts problems in the future.

Professional Diagnosis And Repair

For complex electrical issues or extensive damage, it may require a professional to accurately diagnose and repair the problem. Dealership technicians have specialized knowledge and resources to get your Honda Accord’s rear defroster functioning optimally again.

They can pinpoint specific component failures in the complex defroster system. With the right diagnosis, they can replace defective parts, rewire connections, or make other repairs. While professional repair costs more, it ensures the problem is properly fixed.

Preventative Maintenance

Simple maintenance steps can prevent many defroster problems and keep your Honda driving safely and fog-free. Check heating elements regularly for any cracks or dark spots indicating damage. Clear off snow, ice, and debris that can obstruct defroster performance. Ensure all electrical connections are snug and free of corrosion.

Test operation periodically to catch problems early before they leave you stranded. Make any identified repairs promptly. Following the maintenance schedule will maximize the life and effectiveness of your Honda Accord’s invaluable rear defroster system.

Frequently Asked Questions

Why Did My Honda Accord’s Rear Defroster Stop Working?

Common causes include blown fuses, damaged heating elements, loose wire connections, electrical faults, and frozen components. The specific reason requires troubleshooting to identify.

How Can I Repair Broken Lines In My Defroster Grid?

Lightly sand damaged areas and apply two coats of conductive silver automotive paint. Allow drying time between coats. This should repair small breaks.

What should I check if my Honda Accord’s rear defroster has no power?

Check all fuses related to the defroster circuit. Inspect wiring connections for any loose, damaged, or disconnected wires. This will help identify power supply issues.

Why Does My Defroster Only Work At High Speed?

This symptom usually indicates a problem with the blower motor resistor. Have a technician diagnose and replace the faulty resistor to restore normal operation.

How Can I Prevent Ice From Blocking My Rear Defroster?

Regularly clear snow, frost, and ice buildup that can obstruct defroster performance. Check that heating elements are free of cracks allowing moisture intrusion.

Also Read: Honda Accord Power Steering Problems


A non-working defroster in your Honda Accord can create visibility issues and driving hazards. In most cases, the problem can be resolved with simple troubleshooting and repairs. Focus on bad fuses, heating element damage, loose plugs, and electrical issues.

Reset procedures or professional diagnosis may be needed for more complex problems. Addressing the specific cause will get your defroster functioning optimally again, maintaining clear visibility and safe winter driving.

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Ammar Masoud

I have had a long and fulfilling career in the automotive industry, primarily with Honda and Acura. With 15 years of experience as a Honda service technician, I became highly skilled in repair and maintenance, gaining a deep understanding of these vehicles. After many years in the automotive field, I decided to embark on a second career in industrial manufacturing. It was a significant change, but I found that the skills I had honed in the automotive industry were incredibly valuable in my new role. In my current position in industrial manufacturing, the demand for quality workmanship and meticulous attention to detail is paramount. Fortunately, these are traits that I have cultivated throughout my years in the automotive industry. I take pride in applying these skills to meet the high standards expected in the manufacturing sector.