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!

Why is my condenser fan not coming on?

The cooling fans and condenser fans either are not coming on from a loss of power or the motors are burned up. First check the cooling fan circuit. If there is no power to the cooling fan, then check the fuses and see if they are burned.

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.

Why is my a / C compressor not coming on?

If there is voltage to the sensors and nothing past the sensors, then the system is low on refrigerant. If there is no voltage to the sensors, then the a/c switch would need to be replaced. The cooling fans and condenser fans either are not coming on from a loss of power or the motors are burned up.

What to do if your Honda AC Fan is not working?

DO this easy check First! If your Honda Fans aren’t working it can be easy repair. I found that both the radiator fan and the AC fan weren’t working. or replace the fans, relays, temperature switch or even the fuses. The temperature switch is an easy repair and it’s even easier to replace. You can get the part from Amazon.com for cheap!

Why is the radiator fan not working on my Honda Odyssey?

The Radiator Fan is not working during Normal Engine Run, but when i Turn-ON the AC, the Radiator Fan and Condenser Fan is working synchronously (Start and Stop at the same time). I could not locate the Radiator Fan switch?

Why is my radiator not working when the AC is on?

I checked it while it is on cold state, but then when turn the AC ON the Radiator Fan turn on, so I let the AC ON while i drive my car, after 30mins driving if i turn the AC OFF, the RADIATOR FAN still dont work, even the Radiator Temp was hot. The coolant temp has to be hot for the fan to come on.

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.

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.

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.

Is the Honda Civic overheating on the highway?

I have a honda civic 2000 and recently I noticed that it overheat only after exiting a long drive on highway. The car does not overheat for my normal daily commutes (within the city). Checked coolant on bot radiator and overflow tank. No leak on the ground in the garage where I parked the car overnight

What to do if your radiator fan is not turned on?

First point of call is to get your car scanned and see what codes come up if any. Also find the relay for the fans and see if it is faulty. They are mostly all the same and can often be interchanged. Find a non critical one like the Horn or headlight relay and swap it out with the fan relay.

Why is my Honda Civic overheating at low speeds?

But when the car is driving at low speeds or at a standstill, it’s up to the fan to do that job. If the fan isn’t kicking in, then there a few things that could cause that. One of the reasons could be a faulty thermostat, as the thermostat tells the fan when to turn on and off.

Why is my Honda Civic not turning on?

If the fan isn’t kicking in, then there a few things that could cause that. One of the reasons could be a faulty thermostat, as the thermostat tells the fan when to turn on and off. Another reason could be that the fan’s wiring harness is not getting power to actually turn the fan on.

Why does the coolant leak out of the radiator?

A coolant leak. While driving, the incoming air flow allows the radiator to keep the coolant temperature down. But when the car is driving at low speeds or at a standstill, it’s up to the fan to do that job. If the fan isn’t kicking in, then there a few things that could cause that.

How does the cooling system work in a car?

Your car’s cooling system allows the engine to function at the optimum temperature by using air to keep the engine coolant cool, and distributing it throughout the engine. If your car is running sluggish, has coolant leaks, steam, or engine malfunction, it could be overheating.

What to do if your Honda fans are not working?

Honda Fans not working? DO this easy check First! If your Honda Fans aren’t working it can be easy repair. I found that both the radiator fan and the AC fan weren’t working. or replace the fans, relays, temperature switch or even the fuses. The temperature switch is an easy repair and it’s even easier to replace.

Is there a bad a / C pressure switch shutting off the compressor?

Put 12 volts to the compressor and make sure the clutch locks up first. You checked the compressor clutch fuse, right? Highly unlikely the ECM died for the a/c only. Is there a bad a/c pressure switch shutting off the compressor? Get a shop to hook up the manifold gauges, jump the compressor to engage it and read the pressures.

Why is my Honda Civic a / C not working?

Clogged condenser or radiator ﬁ ns A/C condenser or radiator fan not work- ing properly Clean. Check voltage and fan rpm. Check fan direction. Line to A/C condenser is excessively hot. Restricted ﬂ ow of refrigerant in system Restricted lines. Discharge pressure abnormally low Excessive bubbles in sight glass; A/C condenser is not hot.

Why does my AC fan not come on?

When the ac is of the radiator hoses both become same heat after a while and the overflow reservoir starts boiling over and the fan do not kick in. Any advise please. You might have an initial temperature sensor which causes the fan to come on when the temperature begins to rise; that sensor might be defective.

Why are my coolant fans not running when AC is turned on?

Coolant fans not running when ac is turned on. AC compressor clutch engage then it will disengage. System has freon in it. It was working find but now nothin7. My car has 234565 miles. My car has an automatic transmission.

What do you need to know about Honda Civic a / C?

2006-2011 Honda Civic A/C Diagnosis and Repair EXPANSION VALVE (Meters the required amount of refrigerant into the evaporator) RECEIVER/DRYER DESICCANT (Traps debris, and removes moisture) A/C COMPRESSOR (Suction and compression) A/C CONDENSER (Radiation of heat) A/C PRESSURE SENSOR

Why is my AC compressor not turning on?

If the compressor isn’t starting, check the wiring connecting the two units. If it’s a blown fuse or tripped circuit breaker, the search has come to an end.

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.

What happens when you stop the Honda Civic a / C compressor?

Discharge pressure abnormally high After stopping A/C compressor, pres- sure drops about 196 kPa (2.0 kgf/cm2, 28 psi) quickly, and then falls gradually. Air in system Recover, evacuate, and recharge with speciﬁ ed amount. No bubbles in sight glass when A/C condenser is cooled by water.

How does the radiator work on a Honda Civic?

Honda radiator is a critical component of the cooling system, transferring heat from the coolant to the air flow generated by the fan. The radiator removes excess heat from the engine and keeps a stable, safe temperature for the engine to run properly. Item has been added to your cart! This part contains hazardous material.

What’s the pressure on the air compressor in a Honda Civic?

This time, I revved the car up to about 1,500 to 2,000 RPM (since the Civic seems to idle at around 500 rpm). Sure enough, he said that the low pressure was being sucked down to about 20 PSI and the high-pressure was kicking way up again past 400 PSI.

Can a radiator fan be turned on when the a / C is on?

Yes, the fan will come on when you turn the A/C on, so that proves the fan works. Leave the A/C off for the rest of the test. Start your vehicle, and let it idle for 10-15 minutes. Depending on the ambient temperature in your location, this should be long enough for the coolant temp to get hot and the thermostat to open up.

How much does it cost to replace a Honda radiator fan?

Radiator fan testing points. If the radiator fan is in working condition, move on to the next step. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If this sensor is faulty, a replacement costs around $25 to $45.

How does a radiator fan work when the AC is on?

The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.

How can I tell if my radiator fan is working?

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

Is the 2004 Honda Civic EX over heating?

2004 Honda Civic ex, Over heating, ” Disappearance of coolant” Hi, I have a 2004 Honda Civic ex coupe. I have changed the thermostat (twice), fan sensor, temp. sensor. The fan works and when doing an oil change the oil looks normal.

How does a resistor work on a blower motor?

Other car makers reverse that and run power to the blower motor first and terminate ground at the blower fan speed switch. By it’s very nature, resistors resist the flow of electricity, much like a flow restrictor in a pipe.

What is the under dash fuse box on a Honda Civic?

For the 2005 Honda Civic under-hood fuse box fuse descriptions, go here: Under-Hood Fuse/Relay Box (2005 1.7L Honda Civic). NOTE: If you need to see the under-dash fuse box illustration, go here: Under-Dash Fuse/Relay Box (2001-2005 1.7L Honda Civic).

What are the under hood lights on a Honda Civic?

Under-Hood Fuse/Relay Box (2001-2004 1.7L Honda Civic) PDF. Condenser Fan. Audio Unit. Dash Lights. Front Parking Lights. Front Side Marker Lights. Heater Control Panel. Inner Taillights. Ceiling Light. Ignition Key Light. Spotlights. Trunk Light. Radiator Fan Motor.

What are the relays on a Honda Civic EX?

2001-2004 Civic EX, DX, LX Under-Hood Relays Letter Relay Name A Condenser Fan Motor Relay B Horn Relay C Radiator Fan Motor D A/C Compressor Relay

Why does my Honda Civic not re-start?

Your Honda Civic will not re-start (once it has overheated). Coolant (or water) boiling in the radiator’s overflow tank as the engine runs or when you turn off the engine. Coolant boiling in the radiator’s overflow tank and the radiator fan motor does not activate. Your Civic’s radiator fan motor relay is located in the under-hood fuse box.

What happens when the radiator fan relay fails?

Since the radiator fan motor relay is one of the main components that gets your Honda Civic’s radiator fan motor to run.. when it fails the most obvious symptoms that your Honda Civic will experience is overheating. Your temperature gauge will max out (as you’re driving around). Your Honda Civic will not re-start (once it has overheated).

What happens when a Honda Civic overheats?

Your temperature gauge will max out (as you’re driving around). Your Honda Civic will not re-start (once it has overheated). Coolant (or water) boiling in the radiator’s overflow tank as the engine runs or when you turn off the engine. Coolant boiling in the radiator’s overflow tank and the radiator fan motor does not activate.

Why does my car AC blow cold air then blow warm air?

But that cold air turns warm fairly soon after because the high side pressures build to the point that the high pressure switch shuts off the compressor clutch. Once pressures equalize, the high pressure switch allows the compressor to start up again. The cycle repeats over and over, providing a short period of cold air, followed by warm air.

Do you turn the radiator fan on or off?

The coolant temp has to be hot for the fan to come on. Yes, the fan will come on when you turn the A/C on, so that proves the fan works. Leave the A/C off for the rest of the test. Start your vehicle, and let it idle for 10-15 minutes.

How can I tell if my Honda Civic has an air conditioner problem?

There are two connectors under the hood attached to your A/C’s refrigerant system that should be labeled as such, one for the high Psi end of your gauge (the red side) and one for the low end (the blue side). If the level is unbalanced, it will cause the entire air-conditioning system to shut down as a protective measure.

What should I do if my Honda Civic is running hot?

Inspect the engine. 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 should I do if my radiator fan won’t work?

If the radiator fan is in working condition, move on to the next step. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If this sensor is faulty, a replacement costs around $25 to $45. Follow these steps to test it: Locate the ECT sensor, which is just below the distributor.

When did the Honda Civic 5th generation come out?

Repair guides and support for the 5th generation Honda Civic, first released in late 1991. I have the same question, but I will give feedback on the answer. I have a 92 Civic, replaced a leaking radiator, fan was not working, so I replaced with a new fan same time I replaced the radiator.

Why does my Honda Civic not have a / C?

My 2008 Honda CIvic started having issues this year with the A/C. Took it to a mechanic this morning and he said it appears to be an electrical problem and the compressor isn’t getting any juice. But he checked all the switches he could find and they all check out fine. He suggested I go somewhere that specializes in A/C.

Is there a problem with my Honda Civic LX?

I also have a 2008 Honda Civic LX (with102,000 miles on it) and just spent over $1000 to replace the AC compressor at the Honda dealer (I know this dealership and their mechanics are reputable). The service technician told me that these breakdowns are not uncommon.

Where is the fan on a Honda Civic?

The fan is under the passenger side dash close to the glove compartment. Use the circuit tester and check for power at the 2-wire connector on the blower motor (the key and fan need to be on). If there is no power to the fan, the fan is bad.

Why does my Honda Civic AC not turn on?

If the compressor is not on, the problem could be a matter of power to the system, a bad control head on the dash or no Freon. Start by checking the fuses in the fuse and relay panel under the hood on the drivers side. Replace the fuses as necessary.

What to do if your Honda Civic has no power?

Use the circuit tester and check for power at the 2-wire connector on the blower motor (the key and fan need to be on). If there is no power to the fan, the fan is bad. If there is no power, move to the blower motor resister right next to the blower motor.

What should I do if my Honda AC Fan is not working?

If there is no power to the fan, the fan is bad. If there is no power, move to the blower motor resister right next to the blower motor. It is usually to the left and slightly to the rear and is used to control the speeds of the fan. Check to see if there is power to the resister.

Why is the fan not working on my Honda Civic?

The fan wiring is some of the more vulnerable wiring in your Civic. 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.

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 Jetta not have a cooling fan?

Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .

Why is my Honda radiator fan not working?

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. 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.

What to do if your Honda Odyssey AC is not working?

You might want to try this first if you are having AC problems before you take it to the shop. Swap out both relays and see if it works for you. If it does work, take the bad one and bring it to any parts store to get a new one. If this video helped you and feel like donating anything I really appreciate it! Here’s my cash app. $balatbatbrian87

Why is my rear AC not turning off?

Today I disconnected both the front seat (near the shifter) and first rear seat controls for the rear AC. It didn’t change anything. I finally removed the fuse under the first rear seat to get it to stop blowing. Less than a year ago I replaced the front blower motor control module because the front speeds weren’t working right.

Can a Honda Civic shut off while driving?

Within the last few months the car will shutoff while driving. i have no power steering, nothing. i have to pull the car to side of the road and put the car in nuetral to start. Sometimes it will start right away and other times it will take about 5 to 10 turns of the ignition.

Is there a recall on the Honda Civic?

Honda had a recall on that issue.just under the exhoust theres is some wires that rounds to cose to the exh and rubs against the manefold and it starts to were the cover and it will short out the car will not and also not start .also will stop running anytime when the wire tough. 18 people found this helpful.

How to test the Honda Civic radiator fan relay?

START HERE: The Radiator Fan Motor Relay Tests. TEST 1: Checking The Radiator Fan Relay Power Circuits. TEST 2: Bypassing The Radiator Fan Relay. TEST 3: Bypassing The Radiator Fan Switch. TEST 4: Bench Testing The Radiator Fan Relay. Where To Buy The Radiator Fan Relay And Save. More Honda Civic Test Tutorials.

Where is the fuse box on a Honda Civic?

The under-hood fuse box is located towards the rear of the engine compartment. If you remove the radiator fan motor relay, you’ll notice that its socket (in the under-hood fuse box) has four female terminals.

Why does my car have a radiator fan?

You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.

Where is the relay on a radiator fan?

The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.

When a radiator fan works it usually makes a whirring sound that is easily noticeable. However, the radiator fan does not always start spinning on ignition. The ECU signals the radiator fan to work at the precise time. So, do not worry if the fan doesn’t immediately start working. Visually check the fan if you don’t hear its noise. 1. Broken Fuse

Why does the radiator fan not come on when the AC is on?

In order for the AC Condensor to do its job it must stay as cool as it can. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem.

Where are the fuses on a radiator fan?

Have you checked the fuses in the black box on top of the battery. Those steel like fuses. Fuse 16 on the side of the dashboard. When opening the cover it will be the 2nd fuse from the top left. https://knigaproavto.ru/shemy/en/volkswa…

Is there a way to test a radiator fan?

You can test the electrical radiator fans by taking a wire from the car battery, unplug the radiator fan connector, and put 12v+ and ground into the connector. This is the fastest and easiest way to test your radiator fans. Because the radiator fan is often drawing so much power, there is often a relay that is powering the coolant fan.

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