What do you call an auxiliary cooling fan?
-Michael Harding, June 2017 A couple of decades ago, it was popular to simply add a switch under the dash to control an electric cooling fan, often referred to as an auxiliary fan. This was a mediocre way of doing things, primarily because the current required to spin the fan was drawn through the switch itself.
How do you replace a cooling fan relay?
The cooling fan relay has an electrical connector that will need to be disconnected and switched over to the replacement cooling fan relay. Most commonly used connectors are a push type connector. Disconnect connector and remove cooling fan relay. Step 3: Compare the replacement cooling fan relay to the one being removed.
How can you tell if an auxiliary fan has failed?
The first sign that the aux fan has failed may be warmer than expected air from the interior vents when the air conditioning is on and the car is at a standstill or in stop-and-go traffic. Still another sign is a rattling noise coming from the air conditioning compressor located at the front lower right section of the engine bay.
Can a flex a Lite be used as an auxiliary fan?
Auxiliary Fans These are Flex-a-lite electric fans designed to be used as auxiliary cooling fans, mounted in front of the radiator, to help a belt-driven fan with additional airflow through the radiator at idle or slow vehicle speeds.
How do you replace an auxiliary fan assembly?
Slide in the replacement auxiliary fan assembly. Make sure that the frame is correctly positioned on the mount. Tighten all the screws to secure the new fan assembly in place. Reconnect the electrical wirings that provide power to the auxiliary fan.
When to use an auxiliary electric fan in a car?
Some times you need a little extra airflow at slow vehicle speeds to keep your car or truck cool. That’s when an auxiliary electric fan mounted in front of the radiator may be just the ticket.
Can a flex a Lite fan be used as an auxiliary fan?
In some applications, this can cause the engine to run hot or overheat because there isn’t enough air moving through the radiator. Adding an auxiliary electric fan to the front of the radiator can overcome this problem. Flex-a-lite makes several fans that have an open shroud design to allow for airflow, which is ideal for this use.
What kind of auxiliary fan does VDO use?
VDO offers a wide range of car cooling system components, which include cooling modules, cooling motors, and auxiliary fans. This brand also sells the individual components of the auxiliary fan assembly separately. Their auxiliary fans are available in single or dual units. The same goes for the cooling product selections of TYC Genera.
What should the temperature be for a fan to shut off?
The temperature sender, if used, is designed to provide a ground signal at about 185 degrees, and will shut back off when the temperature drops below 165 degrees. This wire (gray in our kit) supplies the ground signal to trigger the relay.
What are the symptoms of a bad cooling fan relay?
1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.
When do you turn on the fan relay?
When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature approaches excessively high temperatures.
When does the VCM turn off the auxiliary cooling fan?
If the auxiliary cooling fan has been turned ON by high A/C head pressure, the VCM will turn the fan OFF when the pressure has dropped to 250 psi. The minimum ON time for the auxiliary cooling fan is 30 seconds. I’m not seeing the pictures in your post.
What should coolant temp be to turn on electric fan?
If your ideal operating temperature is 176-180 I’d agree with setting your fan to turn on at 185, that way it kicks on whenever your coolant temperature starts to climb above that temp your fan can keep things in check.
-Michael Harding, June 2017 A couple of decades ago, it was popular to simply add a switch under the dash to control an electric cooling fan, often referred to as an auxiliary fan. This was a mediocre way of doing things, primarily because the current required to spin the fan was drawn through the switch itself.
What should the temperature be without a fan?
Part number 91064028 has options for fan turn on and off and with the 170 degree thermostat the hot coolant will enter the radiator at 170 and in many cases may cool the engine to this temperature without the fan running.
Do you need a relay kit for dual cooling fans?
Wiring Dual Cooling Fans With dual cooling fans, there are two methods for wiring up the relay kit. This is based on the draw from the fans, if the fans are larger and draw more than 15 amps each, it’s recommended to install a second relay kit as shown below.
Can you use a dash switch on an electric fan?
In electrical terms, that’s a no-no; you should never rely on a switch on the dash to handle the kind of current required to power an accessory that is more than 10-15 amps. A number of things can (and sometimes will) go wrong, even if you buy a switch that can handle 15 amps.
What should the ground signal be on an electric fan?
The temperature sender, if used, is designed to provide a ground signal at about 185 degrees, and will shut back off when the temperature drops below 165 degrees. This wire (gray in our kit) supplies the ground signal to trigger the relay. The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on.
Can a ceiling fan be wired to a single wall switch?
Cap the blue wire coming from the fan by itself with a wire nut as it is not needed when wiring for a single wall switch. Connect the three grounding wires (green, green/yellow stripe, or bare copper) coming from the ceiling fan-rated electrical box, the downrod attached to your fan, and the ceiling bracket.
What kind of wire to use for a fan override switch?
If you get a resistor with larger leads, you can use butt connectors and crimp it together just as I instruct for the diode. 18 gauge wire. Enough to run from your fuse box under the hood to wherever you want to mount your switch, and a bit more to run a ground from your switch. 18 gauge is the smallest wire I use for any wiring projects.
How do you connect a fan wire to a switch?
Connect the fan wire to two diagonal connectors of switch (on right side at top and left side at bottom). Connect the other wire coming from original cut to one of the center terminals of switch. Connect the new fused wire to other center terminal.