Your cart is empty.
Your cart is empty.Fan relays are built to perform quietly, reliably and economically for applications involving: air conditioning, heating, appliance, Fan control and general purpose switching operates in any position heavy-duty general purpose relay operates in any position.
G. Gordon
2025-09-04 15:40:59
Used this relay in conjunction with a transformer to power a Nest thermostat that controls a millivolt Vermont Casting propane stove. Works perfectly. The stove wires connect to the load side on the bottom two tangs. The white wire from the thermostat (switched) connects to one side of the power on the relay and a wire from the transformer connects to the other. Then a blue and red wire from the transformer connect to common and R on the nest.
Cody S.
2025-09-01 18:35:14
Update - December 2022:This relay worked reliably for roughly 3.5 heating seasons. Recently, there were two separate instances where it would audibly click when my thermostat came on but the boiler side wasn’t being connected. I tested the boiler wiring directly and it fired up immediately.Since the relay appeared to be the most likely culprit, I replaced it with a spare one I had which immediately worked as expected.I’m satisfied for how long it lasted. I would recommend buying 2 at a time to just always have a spare if you’re ever using it for something like a Nest.The original seemed to fail when the heat was cycling more than usual as well. Guessing it sped up what was inevitable.Otherwise, my original rating still applies. These are simple and easy to use with a pretty decent lifespan.——————Original Review - October 2019This little relay is cheap but quality. I got this to use in tandem with a 24v hardwired transformer to control my millivolt boiler. Since my current system had no C wire and was just the Rh/W wires to turn the heat on, I couldn't just plug in my Nest.After some research, it seemed like the safest way to add a 24v power supply would be to use a transformer and a relay. Some tutorials claim plugging in the two transformer wires into the C and Rc ports on the Nest will get it to work (which it will) but you run the risk of the Nest sending the 24V of power down to your millivolt system which would not be good.To get around that, I wired up my transformer then ran the Rh wire to the thermostat and the W wire from the thermostat to this relay on the control end then back to the transformer to complete the circuit. Then just plugged in the Red and White wires coming from my boiler into the controlled side of the relay. Completely eliminated the possibility of the two different voltages crossing and messing anything up on my ancient heating system. I also ran an additional wire for the C and Rc ports to provide continuous power but that's not necessary in this setup, just peace of mind for me.Now that it's been getting cold, this relay has been tested without a problem. The Nest kicks on to call for heat and the relay gives a reliable click with the heat kicking on immediately.Just keep in mind this is a physical relay so the click is going to pretty audible. If you don't want to hear it, put it somewhere tucked away. If you're not a fan, you can find a solid state relay that should do the same thing.
rg-sd
2025-08-15 12:23:43
I installed this relay to take care of a problem I had with my thermostat turning heat on on my furnace. I was getting a system protest mode error and a note to install isolation relay. Everything works now that I installed this relay.
Adam Tarbox
2025-07-30 15:30:43
Perfect match for my new Ecobee smart thermostat. My boiler does not have a transformer or modern R/W/C etc connections, it has T/T connections compatible with the old mercury thermostats. Pair this with a 24v transformer and my new school thermostat works great!
Ed P
2025-06-25 14:11:35
I purchased this for a furnace and it was not an exact fit, but a very simple fix and it works great, especially for the money. Cheap and effective replacement.
alm
2025-06-13 14:14:29
seems ok
Sarah
2025-05-25 13:38:36
This was exactly what we needed for our AC unit. It came very quickly and was easy to install!
Tim
2025-04-29 21:05:46
I bought this as an activation relay for my whole house humidifier project. I have a well water and filters and water softener it still leaves a ton of white residue and kills pretty much any type of evaporation-based humidifier in 6 months. So I got a misting humidifier and hooked it up to a reverse osmosis system. Worked great, except the water pressure after the RO system was not sufficient for high atomization in this humidifier. So I plugged in a 24 volt booster pump and wanted to use this relay to activate the pump once the furnace humidifier contact sends 24v. Pump has it's own power supply and all I wanted was to turn it on once the humidifier kicks in. So I have connected this relay in series with the humidifier, which is just really a solenoid valve, and it did not work. Neither the solenoid valve, nor the relay. It turns out that the relay draws so much current that the voltage drops to 12v. So with another load on the line it just does not close the contacts. Tried connecting it in parallel to the solenoid valve, the same story, except the solenoid valve worked and the water was flowing, but the relay never closed. Perhaps I got a defective one. I made it to work by using this relay to activate both the solenoid valve and the booster pump, but I had to buy a temperature switch that would activate once the furnace was hot and close the relay contacts. Less than ideal, since the evaporation humidifiers kick in as soon as the furnace fan is active and can humidify air even if the furnace is not heating the air. Useful when you have a wood burning stove and just use the central fan to circulate warm air.I wish the description would show the current drawn for this relay. I guess it still works, but there cannot be any other load on the circuit. I even tried a 1.5A 24v supply (transformer with a bridge) and still it was not enough.
kcwcc
2025-04-04 10:22:42
No issues. Simple replacement or use to augment your HVAC system. This is a quality part, not a cheap knockoff. You don't want to risk anything effing up your HVAC controls because they will fail at the worst possible time, guaranteed.
Shawn
2025-03-25 17:39:54
Works great. I measured the current draw of the coil it is only 320ma. Was worried because using my new furnace to control a humidifier and didn't want to much load. But 320ma is very low. I am turning on a small fan and solenoid of the humidifier with the contacts. Works great and my home is no longer dry.
Bill Storozuk
2025-01-05 20:35:25
Did its job, connecting Nest thermostat to my Lennox furnace to make it run properly, GOOGLE and LENNOX should get together to correct this “PROBLEMâ€, and quit BANGING HEADS
Carl Pineault
2024-12-27 12:48:16
C’est ok
SK
2024-12-06 13:22:14
This is a very nice relay, the best part is it very quite,Install was very easy.
Recommended Products
$10.90
$ 4 .99 $4.99