This is a beatifully simple thermostat to instal for 2 wire systems.The price is unbelievable and the quality is excellent. We just hooked up our red and white wires to the screws marked red and white and we were off and running. Seems to be quite accurate for our needs. Definitely works far better than the mercury switch we replaced.

no

works great on an old floor heater from 1942!! great upgrade!! Ours was the original mercury thermo.it finally broke.

Easy to read and set. Easy to install.Glad I got it

This works great in the camper with a 12 volt system. There are no batteries to go dead like my fancy digital thermostat had - causing the furnace not to work.

Inexpensive and good quality

Great for my RV.. don't worry about the 24v.. its perfect fit for my suburban furnace.

This was ordered for our travel trailer. It was not difficult to install and is accurate.

Easily replaced old heat only thermostat in my motor home.

Works as should.

Installed on 24v gas heater, works great. Easy to turn off when not in use. Installation was easy.

Worked great

Works well and easy to install. It replaced an outdated model on ours.

Works great

It's great easy to read, came quickly, accurate.

Replace same model that was 30yrs old with this one, works really well and very easy to install. Thermostat on unit is for estimates only not real accurate.

Easy to install

Works GREAT!

Works in our millivolt floor furnace application well in that when it connects the two wires the furnace turns on and when it opens the furnace turns off. The only issue I have is that the control is so course. When set to 75 for example it stays on until the air temp is 80 then turns off. When the air temp reaches about 68 it turns back on. It rocks between the 10-12 degree range. I find I have to get up and turn the temp down when it is heating then turn it back on again when the place cools down. Good exercise. But, that kind of defeats the purpose of the contraption. Other than the range of control, this works well and is a very easy install. I think I am going to try one of the electronic ones that uses a calibrated thermistor rather than the bimetal to see if I can get control as good as the old Mercury thermostat. That one was /-2 degrees for a temp band of about 4 degrees. The electronic one requires batteries but claims /- 1 degree control. That might cause a furnace oscillation problem though. It is tough to beat the old Mercury devices.

Two wires. Bam! Done.