Why does my Honda Civic fan not run?

Table of Contents

Why does my Honda Civic fan not run?

With the jumper attached, the fan should run continuously when the ignition is in the “ON” position. If the fan does not run, this is an indication that the thermo switch is faulty. If this is the case, you will need to replace the thermo switch. Figure 2. Location of thermo switch in a Honda Civic’s thermostat housing.

Why is the radiator not working on my Honda Civic?

Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your Civic is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. There are a few simple reasons that the fan would not be cycling on.

What should I do if my Honda radiator fan is not turned on?

Find a non critical one like the Horn or headlight relay and swap it out with the fan relay. If that works it is your relay and then you just buy one that is the same. With your engine running and you have your interior fan lever/switch on does it blow air on all positions?

Where is the thermostat plug in a Honda Civic?

Figure 2. Location of thermo switch in a Honda Civic’s thermostat housing. The connector has four holes: two are for the electrical wires of the thermo switch plug and the other two are for the plug’s locking mechanism. Make sure to test the electrical holes and not the locking holes.

Why is my Honda Civic radiator fan not working?

I am using 2004 honda civic 2004 car, radiator fan and cooler fan not working, ac also not working, i checked fuses those are ok, and fan conditions ok ( checked directly from battery , i did short cooling sensor connector pins but no results where is problem how can i get results ? ple help me on this issue Answered!

What to do if your Honda Civic heater stops working?

If the heater has stopped working in your Civic, this process has failed in one way or another. A word of caution: If there is no coolant in your overflow, you can refill it by adding more to the overflow reservoir. There is almost never a situation where you would need to take the radiator cap off of the radiator to add coolant.

Why are the fans not running in my Honda?

Lift bonnet/hood then check and see if fans are running, both should be. Do not assume because they aren’t that your fans are bad. It could be a temp sensor failure. Was this answer helpful? Yes its done, Interior fan all the way on, AC on. Engine on, in neutral or park handbrake/E brake on. Both fans are On /Off a few seconds only.

Figure 2. Location of thermo switch in a Honda Civic’s thermostat housing. The connector has four holes: two are for the electrical wires of the thermo switch plug and the other two are for the plug’s locking mechanism. Make sure to test the electrical holes and not the locking holes.

How to test if a Honda radiator fan is working?

Here is how to test if the fan is functioning properly: 1 Unplug the radiator fan connector. 2 Run jumper wires between the connector’s two electrical terminals. See Contact Test in Step 1. 3 If the fan does not turn on, you will need to replace it.

Why does my Honda Civic get ice in it?

Ice formation can occur if somehow moisture got introduced into the system. As an experiment to pin point the problem, you can have your AC blow hot air and see if that improves the time that the system takes to start cooling again normally. It’s a simple fix. I had the exact same issue with my Honda 2010 Civic.

Where is the fan blower motor on my AC?

All fuses good all relays good. The fan blower for your ac/heater is located under the glovebox. Take your hand and smack the fan blower motor a few times. That’s all it took for for mine to start working again. It’s been working for over 6 month’s now!

With the jumper attached, the fan should run continuously when the ignition is in the “ON” position. If the fan does not run, this is an indication that the thermo switch is faulty. If this is the case, you will need to replace the thermo switch. Figure 2. Location of thermo switch in a Honda Civic’s thermostat housing.

What’s the problem with my Honda Civic a / C?

2006 Honda Civic. The A/C works for the first 5 minutes of the day (blows pretty cold), then doesn’t come on again. When the A/C works for that first five minutes, the clutch engages (no weird sounds) and the cooling fan is on.

Why does my Honda A / C only work intermittently?

It will work intermittently but after a time will open up. Best test for this is to run it until it stops then check continuity across the clutch coil. Controlers can go bad as well, but typically on this model i have found it is the clutch coil.

What to do if your Honda AC is not working?

You may be better off going to a shop and paying for an A/C service. That costs about the same as good set of gauges anyway. At the very least, they can tell you what is wrong with the system if there is a bad part. I should also mention that the fan still comes on even when the AC isn’t on.

Where is the ECT sensor on a Honda Accord?

Follow these steps to test it: Locate the ECT sensor, which is just below the distributor. Unplug the sensor. Bridge the gap in the sensor connector with jumper wires. See Contact Test in Step 1. If the radiator fan does not come on, you will need to replace it. Figure 4. Location of ECT sensor for a ’98 Accord.

What does it mean if your VTEC is not working?

If you can not HEAR it clearly that does not mean it is not working. Get a test light and check it. 3 weeks later… i like it. i just saw that post today while i was lurking on dseries. im gonna get an account sometime soon

Why is my radiator fan not working on my Honda Civic?

Figure 1. 1999 Civic under-hood fuse box with location of fan relay (circled in red). Another easy way you can check if the radiator fan switch relay is bad is to swap the radiator fan relay with the condenser fan relay. If the radiator fan begins working, this is an indication that the fan relay is bad.

Why is the top of my Honda Civic so hot?

The top hose is hot, the bottom is cool but does not feel like there is any pressure. If taken for a test drive the temp is fine for a while but then it climbs up as you accelerate, let off the gas and the temp comes down. The 2 fans are working. Any suggestions. I will be doing a compression test tomorrow just in case to check the head gasket.

What was the problem with my Honda Civic?

White smoke/steam started was coming out of the hood. Pulled over, turned the car off, popped the hood and the fluid in the reservoir was extremely hot..bubbling and pouring out. This guy helped me out, took off the radiator cap, a white/brownish foam was pouring out of the reservoir/radiator.

Here is how to test if the fan is functioning properly: 1 Unplug the radiator fan connector. 2 Run jumper wires between the connector’s two electrical terminals. See Contact Test in Step 1. 3 If the fan does not turn on, you will need to replace it.

Why is my radiator fan not working in my garage?

You also no longer hear the reassuring sound of the radiator fan kicking in when you pull into your garage. If this is the case, it might be time to check if the fan is working properly, and is cooling things down under the hood.

How can I tell if my radiator fan relay is bad?

Another easy way you can check if the radiator fan switch relay is bad is to swap the radiator fan relay with the condenser fan relay. If the radiator fan begins working, this is an indication that the fan relay is bad. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step.

Why is my Honda Civic heater not working?

While there are a variety of reasons your Honda Civic heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Get your Honda issue diagnosed by a professional.

What does the thermo switch on a Honda radiator do?

If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot.

While there are a variety of reasons your Honda Civic heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Get your Honda issue diagnosed by a professional.

What to do when your car fan won’t turn on?

To diagnose the problem, press the MODE (VENT/FLOOR) button several times. The LED should flash on and off as you press the button. Turn the ignition and the fan switch to the “OFF” position. Set the temperature control dial on Max Cool. Push the mode control button and select Vent.

How do you turn off the AC vent?

The LED should flash on and off as you press the button. Turn the ignition and the fan switch to the “OFF” position. Set the temperature control dial on Max Cool. Push the mode control button and select Vent. Turn on the ignition. Press and hold the recirculation control button.

Why is my Honda Civic running so hot?

A Civic’s engine lies alongside the A/C setup under the hood, so if you can’t find anything wrong with the freon levels or the compressor, you may need to consider a different source. If you discover that the engine is running hot, its proximity to the A/C will negatively affect the system’s cooling capacity.

What to do if your Honda Civic Air Conditioner breaks?

You don’t normally give the inner workings of your Honda Civic a second thought until something goes wrong, especially when it affects the interior temperature. But visiting the auto mechanic after your air conditioner breaks can be a costly trip if you weren’t planning on such an expense.

What kind of Freon does a Honda Civic use?

Depending on the year of your Civic, the A/C may use R12 freon. Don’t attempt to adjust the level of this freon yourself, as it requires special tools that prevent the freon from being released into the atmosphere. It’s illegal to purchase R12 freon without a license and doing so carries a hefty fine.

Why does my fan fuse keep blowing out?

A blown cooling fan circuit fuse is another symptom of a potential problem with the cooling fan motors. If the motors fail or surge, they may cause the fuse to blow in order to protect the rest of the system from any sort of damage due to electrical surges. The fuse will have to be replaced to restore possible functionality to the fans.

What should I do if my blower fan is not turning?

Repair the connector. If the motor still does not turn, the motor is bad. Replace the motor. Test the switch. Plug the connector back in to the blower motor, and then trace the wire harness back to the connector closest to the blower motor switch, usually located under the dash. Disconnect the connector and set the multimeter to ohms.

Why is the fan not working on my Honda CRV?

The fan wiring is some of the more vulnerable wiring in your CR-V. You can test the voltage going from the fan relay to the fan itself. If it is getting 12+ volts, the fan should be coming on. But if it’s not, which means the fan has gone bad.

What causes a bad or failing blower motor relay?

Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…

What causes a fuse to blow on a blower motor?

If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.

If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot.

How can I make my Honda radiator fan work?

Place one end of a fused jumper wire on one of the relay’s control terminals. Place the other end of the fused jumper wire on the car’s positive (red) terminal of the battery. Then, touch one end of a regular jumper wire to the other relay’s control terminal. Ground the other end of the regular jumper wire to the vehicle.

How can I check if my Honda fan is bad?

Could the fan be bad how can i check that… hot wire the fan (undo the plug from the fan and have 2 wires from the battery to the plug leads of the fan) if you cant find the problem you can just hook the fan to a toggle switch ,and just put it on when you need it

How can I hot wire my Honda fan?

hot wire the fan (undo the plug from the fan and have 2 wires from the battery to the plug leads of the fan) if you cant find the problem you can just hook the fan to a toggle switch ,and just put it on when you need it Hot wire fan like rich said, that will narrow down that the fan motor is good, then just start tracing and ohming wires.

Why does my Honda Foreman 450 fan never come on?

As far as the the light coming on it has never came on. my foreman 450 fan never comes on if the weather is less then 80 degrees. Check the fuses first and formost. If you unplug the fan you can test that side of the circuit to see if you have a power.

What to do if your cooling fan is not working?

Take it apart there and put a ground wire in there and plug it back together. Then when the key is on the fan will run. To test the fan ground the blue wire going to the oil thermosensor .. To test the fan motor apply 12v to the blue fan motor wire .. To test the fan control unit .. I found it was just a blown fuse.