[Bchavez]

First off nothing is wrong with the current dial knob tstat but I am needing or wanting something more accurate and keeps a more constant temp. (5 degree drop between turn ons are getting old) I have three baseboard heaters hooked up to one tstat. Single stage, 4000 watts total. What do you all suggest and is it as simple as turning the power off and taking the old one off/putting the new one up just like the old? I considered calling an electrician because of a comment the electrician made when the house was built 5 years ago. He says that it takes a certain tstat not just any tstat. Also we have a 2 -1500 watt and a 1000 watt heater connected but only 1- 1500 and the 1000 watt heater come on at any given set temp and the 3 rd heater will join in when the tstat is set to a temp of 68 or above. It then will shut off before the other 2, it sure heats up the room really fast but I rarely set it that high because it heats up to 73 with the 5 degree variation. See my dilemma/concerns? Thank you!

 

[joed]

It depends if this is a line voltage stat or a low voltage stat.

 

[AllanJ]

There is always a spread of a few degrees between when a thermostat turns on and when it turns off. Somehow I think that most models have a spread of more than three degrees.

Double pole thermostats (recommended so as to control both legs (supply and return if you insist) of 240 volt circuits, or alternatively used to control two circuits and therefore up to twice the wattage) often don't turn both poles on or off at (exactly) the same temperature. Usually they have calibrating screws so you can get it close.

 

[Bchavez]

The model number of the unit is m600s.

It's set at 60 but it kicks on at 66 degrees and turns off at 70 or 71 degrees. I have a separate indoor/out thermometer so I know the inside temp since this wall mount is not accurate.

 

[Bchavez]

It depends if this is a line voltage stat or a low voltage stat.

According to the model number it is a line voltage.

 

[k_buz]

There are a ton out there.

http://lmgtfy.com/?q=240V+programable+digital+t+stat

 

[AllanJ]

It's set at 60 but it kicks on at 66 degrees and turns off at 70 or 71 degrees. I have a separate indoor/out thermometer so I know the inside temp since this wall mount is not accurate.

I'm pretty sure that all thermostats have some calibration adjustment inside.