I would like to know how to test a digital thermostat (new Honeywell programmable) with a multimeter at the furnace control board The control board is Honeywell TotalZone.
I have standard mult-meter and need to know where to put the leads and what settings. Also, is this signal in millivolts DC and what *
So, when the thermostat should be calling for heat, what should the multi-meter read at the control *
Thanks in advance,