It sounds like there may be an issue with the air conditioning system in your Honda Accord. The air conditioning system typically controls the center vents, so if they are not working correctly, it may be due to a problem with the system itself.
One possible cause of this issue could be a faulty blower motor responsible for circulating air through the vents.
Another potential cause could be a problem with the air conditioning compressor, which is responsible for cooling the air blown through the vents.
It’s also possible that there may be a problem with the air conditioning control unit, which is the component that controls the operation of the air conditioning system.
In any case, it’s best to have a trained mechanic diagnose and repair the problem to ensure that your air conditioning system is working properly.
Diagnosing Honda Accord Center Vents
If you want to try to diagnose and repair the problem with your Honda Accord’s air conditioning system yourself, here are some steps you can follow:
First, check the air conditioning system’s fuse to ensure it hasn’t blown. The fuse is usually located in the vehicle’s box, typically under the dashboard on the driver’s side. If the fuse has blown, replace it with a new fuse of the same amperage rating.
Next, check the air conditioning system’s belt to ensure it is properly tensioned and in good condition. The belt is typically located under the vehicle’s hood, and you can access it by opening the hood and looking for the belt on the front of the engine. If the belt is loose or damaged, it will need to be tightened or replaced.
Check the air conditioning system’s compressor to ensure it is functioning correctly. The compressor is typically located at the front of the engine and compresses and circulates the refrigerant through the air conditioning system. If the compressor is not working properly, it will need to be replaced.
Check the air conditioning system’s blower motor to ensure it functions properly. The blower motor is responsible for circulating air through the vents, and if it is not working properly, it may cause a problem with your center vents.
You can access the blower motor by removing the vehicle’s dashboard cover and looking for the motor near the bottom of the dashboard. If the blower motor is not working properly, it will need to be replaced.
Finally, check the air conditioning system’s control unit to ensure it functions properly. The control unit is responsible for controlling the operation of the air conditioning system, and if it is not working properly, it may cause a problem with your center vents.
You can access the control unit by removing the vehicle’s dashboard cover and looking for the unit near the top of the dashboard. If the control unit is not working properly, it will need to be replaced.
Suppose you are not comfortable performing these steps yourself or cannot diagnose and repair the problem with your air conditioning system. In that case, it’s best to have a trained mechanic handle the repair to ensure it is done properly.
How To Fix Stuck Air Vents On A Honda Accord?
Your mode control motor may malfunction if your air vents are stuck. Changing the fuse can solve the problem, or it can simply be a blown a fuse. There is no difficulty in replacing it.
If it works intermittently, there may be a problem with your air/heat. When the blower motor operates in one mode and does not in another mode, then you may need to replace the blower motor resistor. Run a self-diagnosis test before trying to resolve the issue. You should be able to determine where the problem lies.
Step 1 – Run The Self-Diagnostic Function
By self-diagnosing, you can find out what the problem is.
You can diagnose the problem by repeatedly pressing the MODE (VENT/FLOOR) button. Press the button repeatedly to make the LED flash.
Ensure that the ignition and fan switches are in the “OFF” position.
Select the Max Cool setting on the temperature control dial. You can select Vent by pressing the mode control button.
Start the engine.
Keep holding the button for recirculation control.
Keeping the button pressed, press the rear window defogger button five times within 10 seconds. The self-diagnostic will begin after the recirculation indicator blinks twice.
In order to tell if there is a problem, the recirculation indicator will flash once the self-diagnostic is complete. A flashing light indicates a system problem if it occurs one to six times.
The evaporator temperature sensor circuit malfunctions if the light flashes seven or eight times. There was no problem detected if the light didn’t flash during the self-diagnostic test.
Step 2 – Check Mode Control Motor Fuse
It may be that the mode control motor is malfunctioning when only air is coming out of the face vents. Ensure the problem isn’t a blown fuse before replacing the mode control motor.
A blown fuse prevents the motor from functioning, which means the door that controls air direction cannot move. The fuse panel for the driver’s side of the car can be found on the driver’s side.
It is the number 8 fuse that controls the mode control motor. There is a 7.5-amp fuse in the circuit. Replace the fuse and see if this solves the problem. The next step is to move on if this is not the case.
Step 3 – Replace Mode Control Motor
Locate the motor that controls the mode. Depending on your chosen mode, the mode control motor changes how air passes through the system. You’ll find it under the instrument panel and to the left of the heater case on the driver’s side.
Right above the heater case is the blower motor. A parallel line should be drawn between the mode control motor and the left fender. The mode control motor is wired with seven wires.
Every time the key is turned to the “II” position, one of the wires gets voltage. Grounding will also be applied to one wire. The dashboard will ground another wire based on the mode selected.
Remove the mode control motor and replace it with a new one.
Check if the problem has been resolved by turning on the ignition.
Step 4 – Manually Adjust Slide Levels
It is difficult for the motor to turn dry slide levers, and sometimes it is unable to turn them at all.
You can turn the levers by hand and lubricate the slides to solve the problem. You can access the slide levers by pushing the driver’s side seat back as far as you can. Located beneath the dashboard, the slide levers are located in the middle.
Step 5 – Replace Blower Motor Resistor
If your fan works at one speed but not another, it may be a problem with your blower motor resistor. It works when the fan is in position two and not in position three. But when the fan is in position four, it works.
You can expect to pay between $12 and $30 for a new blower motor resistor. The blower motor resistor can be found in the blower motor. It is located beneath the glove box.
You will see several blue connections on the end of the brown plug. Pull the plug out of the resistor by pressing on the tab. Take out the mounting screws using a Phillips screwdriver.
As soon as the resistor is removed, it should fall off. Replacing the old resistor and remounting and reconnecting the connections are all required. Using your fan speed controls, turn the ignition to the “ON” position.
How Long Do AC Blower Motors Last?
Accord blower motors are not part of regular maintenance; they must be replaced when they fail. Overheating, moisture damage and manufacturing defects can cause blower motors to fail earlier than the expected lifespan of over 10 years.
A blower motor’s bearings can also dry out over time due to a lack of lubrication, increasing friction in the motor. If this occurs, it is possible to hear unusual whirring or droning noises from behind the dashboard.
What Causes Blower Motor Resistor To Fail In Accord?
When the blower motor struggles due to internal component degradation, it can place a lot of strain on the resistor, which can cause it to burn out. Therefore, when replacing the resistor in an Accord, it is usually recommended that the old blower motor also be replaced.
Will A Blower Motor Work If The Resistor Is Bad?
If the resistor fails, the blower motor may still function but only run at high speed or remain stuck at one speed. Overheating may cause the resistor to fail, causing the blower motor to stop working.
If the AC blower motor on your Honda Accord isn’t working, there are many possible reasons. Start by checking for the most obvious cause, such as a blown a fuse or faulty relay, when looking for the cause.
Anyhow, laypeople should go to a workshop as they can easily damage their vehicles, especially their electrical systems. Getting the issue diagnosed by a mechanic will save you time and money.