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Gary Novosielski
2025-07-08 13:59:54
This is a nicely designed unit that can handle both a heater and air conditioner, each with up to a full 15 amp draw simultaneously, since it will only supply power to one or the other, but never both. It can also be used to handle just one of either type of course. It will control over a wide range of temperatures from more than fifty below to over two hundred degrees Fahrenheit, and can be set to use Celsius.It has an external temperature probe that on a quick test with ice water proved to be rapidly responsive and dead accurate to within 0.1 °F. It controls by setting a single set point, and specifying a heating differential and cooling differential which control how far below or above the set point the temperature may drift before supplying power to the appropriate unit until the set point is reached again.It is very useful when the temperature knobs on portable electric heaters or air conditioners are not accurate enough to keep a constant temperature. On most units, you get a 1-10 dial with no way to know what the temperatures are without a lot of trial and error, and bad performance even then. Having the thermostat external solves that problem.The unit can be set to protect air conditioning compressors by setting a minimum down time in minutes so that the AC can't be cycled off and on rapidly. and can be set to audibly alarm at specified high and low temperatures.I was concerned that since it had touch controls it might not recover from a power failure, but this is not a problem. It behaves as expected: if it was turned on when the power fails, it will turn back on when it's restored, and if it was originally off, it will beep once but stay off.
Erin Davis
2025-06-02 13:19:59
I looked at many controllers before settling on this one. First I needed one that would handle a 15,000 btu window a/c so that put many of them out. Between the rest, I ended up choosing this one. Very happy with this! It's pretty easy to set and the only reason I say pretty easy is because I have to think backwards since you set the shut off temp first (for a cooling appliance) and then add the number of degrees to that for when it cuts on. Probably easy for most everyone else but me. Still, it's an easy press of the button to set the on and off temp. It's got a nice long power cord and a nice long temperature probe cord which is very handy for me. It's worked perfectly all summer and we've had a couple of power outages. It also has a compressor delay function which is helpful. I'd buy this again if I needed another and have recommended it to a few friends. UPDATE: After two full hot summers running my large window a/c unit, and now being used to turn on/off two heat lamps I have to say I'm more than pleased with this unit. This past summer it would trip it's breaker occasionally and I thought perhaps it was the controller but later realized my old window a/c unit was off and on pulling too much power at startup coupled with periods of too much voltage spikes and dips on my line after the wind turbines were powered on all around me. It's running the heat lamps perfectly and the temp probe reads spot on with another thermometer probe I have hung next to it so I can read the temperature from inside. I highly recommend this unit.UPDATE at 4 years: Still no problems or complaints! This thing just keeps on working perfectly and spot on with the temps and controlling whatever I have plugged into it. I first thought it was a bit expensive when I purchased it but now I see that it's worth every penny and more. Don't hesitate to buy this if you have any needs at all for controlling a heating or cooling device.UPDATE AT 5 Years: Still going strong and reliable as ever. I count on this to keep my water lines from freezing in the rv basement area and it has it's work cut out for it for several months of the year, running two heat lamps. Seems perfectly on temp. Definitely a great purchase!
adam0789
2025-05-20 20:03:27
I've been using this for a week, and the temperature maintains very well. The probe is accurate to within 1 degree when comparing to my digital and mercury thermometers, which is great! Although figuring out how to adjust the settings is confusing at first, the unit comes with an instruction booklet that very clearly describes how to get the unit to do what you want. Many of the negative reviewers saying they unit can't do certain things are incorrect, they just don't have the right settings adjusted right. Maybe the instructions I got are an updated version from theirs, but it makes it pretty clear.My one regret is not getting the BN-LINK version, which seems to be the EXACT same unit, except a better 1875W rating vs 1650W for this product, the company website seems more legit and American based, AND it's $10 cheaper (since when is a China product more expensive!?).If you made it this far, there's a few extra settings that I didn't expect that are really nice: 1) you can set a time threshold before your heating or cooling device turns on, meaning it won't cycle on and off too frequently if your settings too close. This is helpful for me, because I'm maintaining exactly 68 degrees for my homebrew fermentation, so I have the heat turning on at 67.8 and turning off at 68.0, with a 2 minute time delay. With temperature settings so close, a 2 minute time delay keeps my heater from kicking on and off every 15 seconds. 2) There is a temperature adjustment setting, so if your device usually reads hot by 4 degrees, you can adjust it so the unit always shows you 4 degrees lower than the probe reads, therefore making it more "accurate"
Barry Kocay
2025-04-26 15:12:59
Works great!
NP
2025-04-19 14:22:55
This controller works great and is easy to program. We are using it to control a 10,000 BTU air-conditioning unit for our wineroom. The AC unit is located in our service room and the cold air output is fed into a 6" insulated duct to the wineroom, 25 ft. away. I remotely located the controller's temperature sensor (2 wire NTC type) in the wineroom. The controller is in the service room. You can set the temperature and the hysteresis to within 0.1 degree F. This is the on/off set points. I set our to fluctuate 0.5 degree F so the AC unit would not cycle on and off too much. I set the temperature to 56 degrees F and it cools it to that temperature perfectly, then it allows the room to heat up to 56.5 degrees F before turning on again. It's perfect and the displays are big and bright. To make the AC unit operate below is lower limit of 62 degrees F, I moved the AC unit's thermistor from the face or cooling fins of the evaporator. (update: I discovered that the AC unit was sometimes shutting off before the controller would so I added a 68kohm resistor in parallels to the AC units thermistor. This makes the AC unit run colder and solved the problem)Prior to getting the controller, I had remotely located the AC unit's temperature sensor in the wireroom but I found the temperature fluctuated a lot (up to 6 degrees). I think this is designed behavior to improve the AC unit's efficiency so the best solution for excellent temperature tracking is using this controller.(update: I found the AC unit runs its fan at least 30 seconds prior to the compressor turning on. This was causing a temperature drop in the wineroom so I adjusted the controller to 0.1 degrees F between the on/off setpoints an this makes the winreoom operate within 0.4 degrees F of the set temperature. The is a 1500% improvement because of the controller compared to not using the controller as the temperature was fluctuating 6 degrees before. Succsess!
RCMAN55
2025-02-19 17:15:54
I will be purchasing more of these.
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