Best Automotive Replacement Condenser Fan Relays in 2022

Last update: November 21, 2022

Emerson 90-290Q Fan Relay SPST Review:


I connected my Honeywell whole-house humidifier to a Nest thermostat using this relay. I decided to give this relay a try after previously buying a different (and more expensive) relay from Amazon that only lasted a few weeks. All is well thus far. Although I've only had it for one day, it works flawlessly. I'll keep you updated if anything changes. One advantage of this one over the other is that it is MUCH quieter. Despite when standing next to it, you can barely hear this relay turning on and off even though it is a relay and they do click when engaging and disengaging. When the other one turned on and off, I could hear it from anywhere in the house.



ESUPPORT Car Universal Transparent Relay 12V 80A SPDT 5Pin Switch Wire Socket Plug Harness Kit Pack of 5 Review:


These relays' specifications are unclear. High 40A coil capacity—capable of handling high current applications without difficulty. What on earth does that even mean? There is no connection between the coil and "high current applications.""40A 14 VDC" is printed on the relay's top (see picture). I have never come across a relay contact with a 14VDC rating. Either it's a type-0 or the contacts are absolutely bad. If they don't work, I'll let you know.Relay coil measured current draw is 128ma @ 12V. It has an 84 ohm resistance. Over several relays, this was rather constant.



GENSSI Car 30A 12V SPST Micro Relay Kit For Electric Fan Fuel Pump Light Horn 4Pin (10 Pack) Review:


I put them to the test on my movable bench power supply, and they perform admirably.The indicated pick up voltage is 7.8 volts, but they only pick up at 7.5 volts. really niceThey did not exactly satisfy the specification and would stop working at 3 volts, even though the drop down value is indicated as 1.2 volts. Although a little disappointing, this is more than sufficient for my needs.At 12v, the coils use approximately 100mA, and as the voltage declines, their consumption marginally decreases. This is not insignificant, and utilizing these on a project that relies on batteries will have a little negative influence on battery life. However, given the cost, I was overjoyed.I put these to the test at 40 amps with a dummy load. The wiring got too hot to touch, yet the relay kept working and was only very little heated. The wiring started to get warm around 30 amps, but not to the point where I would be concerned because the wire is rated at 70c. If necessary, it would be simple to switch out the wiring for something of a greater gauge, and you could likely push this relay up to 50a before it completely failed.



ESUPPORT Car Relay 12v 40a Spst 4pin Socket Review:


These are what I bought to power a 30 amp piece of machinery. I said at the time that just 20 gauge wires were required for the black and white, but all of the wires were 16 gauge. However, the blue, red, and yellow wires are likewise 16 gauge, which is somewhat of a joke for 80 amps. Since these wires should be at least 10 gauge for 80 amps, they act as fusible connections. To reach 30 amps, I utilized 10 gauge. To improve the current capacity, they did loop the 16 gauge wire into the socket, or they could have used two connection points on each of the switched pieces instead (blue, red and yellow). Obviously, connecting two 16 gauge wires to a single 10 gauge wire is preferable to using just one.The relays are quite silent when in use. They work quickly and disconnect just as quickly. The relay is made of high-quality materials and is sturdy. The internal parts seem to be of sufficient size to handle 80 amps. The pins are designed as blade lugs for slip-on connectors and are laid out in a typical Bosch-style relay arrangement. If required, the relay could be attached to a nearby building. Despite the fact that contact 86, which has the black wire in the connector block, is typically thought of as plus, the contacts 85 and 86 may be operated in either way if necessary. The red wire is attached to the typically closed contact (87a), the yellow wire to the normally open contact, and the blue wire to the common contact (30). (87).I originally used a 30 amp relay in my application, but after it failed, I opted to switch to one of these. still going strong.



ESUPPORT Car Relay 12v 30a Spst 4pin Socket Review:


These are what I bought to power a 30 amp piece of machinery. I said at the time that just 20 gauge wires were required for the black and white, but all of the wires were 16 gauge. However, the blue, red, and yellow wires are likewise 16 gauge, which is somewhat of a joke for 80 amps. Since these wires should be at least 10 gauge for 80 amps, they act as fusible connections. To reach 30 amps, I utilized 10 gauge. To improve the current capacity, they did loop the 16 gauge wire into the socket, or they could have used two connection points on each of the switched pieces instead (blue, red and yellow). Obviously, connecting two 16 gauge wires to a single 10 gauge wire is preferable to using just one.The relays are quite silent when in use. They work quickly and disconnect just as quickly. The relay is made of high-quality materials and is sturdy. The internal parts seem to be of sufficient size to handle 80 amps. The pins are designed as blade lugs for slip-on connectors and are laid out in a typical Bosch-style relay arrangement. If required, the relay could be attached to a nearby building. Despite the fact that contact 86, which has the black wire in the connector block, is typically thought of as plus, the contacts 85 and 86 may be operated in either way if necessary. The red wire is attached to the typically closed contact (87a), the yellow wire to the normally open contact, and the blue wire to the common contact (30). (87).I originally used a 30 amp relay in my application, but after it failed, I opted to switch to one of these. still going strong.



Dorman 620-831 Radiator Fan Assembly Review:


Once you remove all the other items and make room for it, it worked excellent and was simple to replace. There are many decent YouTube DIY videos on how to remove the bumper and grille, among other things. I was able to switch the fans without having to put the car into "service mode." It was quite simple to check for a broken auxiliary fan. I simply pulled the quick-connect and connected my multimeter to the connector that is intended to power the fan; sure enough, on a hot day, it quickly displayed about 12 VDC. I took sure to allow the aux fan become very heated before turning off the engine because it is supposed to function after the engine is stopped (when needed). Sure enough, the meter continued to read 12VDC for another 5 minutes or so after the engine was turned off. Before you really need to start disassembling anything, you can perform this test. To try and test the fan directly, I had a spare 12VDC high-capacity battery on hand (but you could just use your car battery). I plugged in power leads, but nothing happened. I then carefully gave the fan and motor a few turns with a screwdriver. After the second attempt, the motor (barely) ignited and spun on its own for approximately a minute. I would estimate that it rotated at less than 60 RPM, which is insufficient to extinguish a baby's first birthday candle.I would have given five stars, but the purchasing process was a little odd. It claimed to be PRIME and in stock, but once I ordered, it stated that delivery would take 5-7 days. I chose the more costly brand even though there was another one on Amazon for $20 cheaper, but it wasn't PRIME eligible, and I needed it quickly. It's also possible that it looked a little nicer. But as soon as I saw the ETA, I tried to cancel the order right away; however, I was unable to do so because it was "too late" and the order had already begun processing. If I had known it would take a week, I probably would have chosen the less expensive option with ground shipment. Anyway, I think it arrived in 3 days and is still functional. I calculated that doing this myself saved me $300 to $500 (of course, I put in a few hours of my own time) - but I like to fix things myself when possible and recommend it to those who are not scared to experiment, go outside of their comfort zone, and do some internet research. Just be careful to stay secure! Definitely, I'd suggest this fan unit.