Troubleshooting a digital thermostat
Gnack, you are mistaken:: a lot of thermostats ARE battery powered and
work independantly of the voltage they are controlling. Some can even
control millivolt systems for wall/floor furnaces. True, some are power
stealing, and some must have a common wire connected, and use batteries
to keep the program if the power is interrupted, but don't say ALL are
that way, because it isn't so. .
|