SWT2F Thermostat DP 120-277V 22A

Purchased this to control a 240v space heater in my workshop as the unit heater does not have a calibrated thermostat or positive off position. Other than for general heating, it is important to be able to set heater to prevent freezing in the shop when vacant. Placed this thermostat in line with the power cord. Easy to install as is any line voltage thermostat, nice to have a positive off position to avoid having heater turn on when shop door is open in winter, However the calibration of this thermostat is horrible. most of the time it is 20 degrees off, set it for 80 degrees and it shuts off when temperature reaches 60. Some times it was closer to 10 degrees off, so there was no way to manually offset the temperature and have it stay where you want it. By this time I have discarded packaging so not worth my time to return it and into the trash bin it went. Purchased the Honeywell YCT410B1000, a name brand thermostat for a couple of bucks less! Now shop stays within 1 or two degrees of where it says on the stat, and it can be set to turn on at 40 degrees (10 degrees less) will help save some more $$ while preventing frozen materials in the shop.

This thermostat will not hold a temperature. It swings about 15 degrees before shutting off/turning on the heater. We used it as an on/off switch for a couple years just because I didn't feel like replacing it again. Finally it quit working as an on/off switch as well. This unit is garbage.

I bought this to control a low amperage wall room vent fan. I installed this in a utility closet to provide warm room air for our heat pump water heater. I am only using one side of the double pole system, in other words the fan is 120 volt. We live in central Texas so I thought a heat pump water heater installed inside our house (just where the old resistance water heater was) made a lot of sense. The cool air discharge of a heat pump water heater is a valuable by product for us at least 7 months a year.I installed a Suncourt TW108 ThruWall Room to Room Fan 8" near the ceiling drawing house air in and discharging just above the water heater. I installed the thermostat in the exhaust air stream from the water heater's heat exchanger. I had a bit of difficulty adjusting the thermostat so that it would come on as the water heater began dumping cool air yet shut off after the water heater's fan shut off and the air warmed back to ambient. I understand that most thermostats operate "on" for several degrees between set point and some operating range. This is so the system does not cycle on-off-on so frequently. It appears this temperature range for my unit was fairly broad, 5° to 6° F or so. This may be uncomfortable for some applications. This may be user adjustable, but, if so, I did not see this in the instruction sheet that came with the unit.One other caveat--this is designed for 240 volt installations. The best I can tell is this only interrupts one side of the circuit. If I am correct, this leaves 120 volt live potential to your appliance. This effectively shuts off the appliance but might surprise an unsuspecting user.This said, this an attractively priced thermostat and appears to be good value.

While it works, it was not marked well for installation, and the instructions didn't help much. The Thermostat feature is not accurate and the is no way to adjust it, The best part of the whole process was that it helped me determine that it was not my radiant ceiling heat that was bad it was the old thermostat. Now if I could adjust the thermostat control so that it was close to the temperature on the dial I would be a lot happier.

Our Electric baseboard heaters were not heating as well this winter, we normally set the thermostat at 68, but this year we had to turn the thermostat to 74 to feel the same heat. We explored getting new electric baseboard heaters because we though they were dying. So We got a friendly y electrician to look at the heaters and the line voltage thermostats. What happened was the thermostat was failing not the heaters. Our electrician tested the heater by taking apart the thermostat and running the heater just using the circuit breaker and measured the room temp with a thermometer. It turns out heaters work fine it was just a thermostat issue.. Our electrician says it’s a very common issue, line voltage thermostat start to become less efficient after 8- 10 years.

The mounting cover is a little small. There is little room for the unit to fill any mistakes around the box. The unit is designed for mounting on a standard box but is very close to the same size, so you have to make sure the cutout for the box is very close. It looks good but until I get it installed. I won't know how it works.

After three months this unit started to lock up and became unresponsive. Sometimes this would happen when the heat was called at 100%. The lock up prevented the thermostat from lowering the temperature at night. We would wake up to a sauna! The only way to reset this unit is to turn it off at the breaker. This unit continues to lock up and requires a circuit breaker reset every three or four days.Not worth my time and money i spent for installer.No No No

Not calibrated. It is off by 11'. I see in not the only one who has this "inferior" QC problem. Although it works , sure would have been nice to get the quality expected that comes with normal functionality.

Thermostat doesn’t engage at 50, more like 58. I have it paired with a stelpro spider heater and to be honest it’s not as good as I thought it would be for the price. Not accurate.

Good quality for price!

Solid reliable product

I used it for wood furnace. Just what I needed worked great.