Your homes system of this vintage has provisions for air-conditioning (cooling), then the thermostat wiring will have at least three wires (some will require a separate r terminal for heating and cooling and will be labeled rh and rc now needing a minimum of 4 wires), r, w, and a y terminal.
, the terminals of the thermostats of today are still labeled the same, and provide the same functions as what we have discussed thus far.
How to hook up a thermostat to the furnace
9use a wire connector to join the black leads from the power supply cable and the input side of the thermostat.
Adding wires to your thermostat location is not possible, or very difficult, look for a thermostat that is battery powered which wont require the terminal c for operation.
How to hook up a thermostat to fan
So would i use the g-wire to provide necessary power to the thermostat for its features, and forfeit the use of fan-only in non-heating mode?
Basic two-wire thermostat can be compared to a simple single-pole switch that you will find throughout your home, only instead of you turning the switch on and off as required, a mechanical or electronic temperature controlled mechanism is the operator of the switch.
How to hook up a thermostat for heat only
Things you will need voltmeter wire cutters utility knife wire strippers wire connectors screwdriver tip when attaching a thermostat directly to an attic fan motor, there will be no second ground wire.
When i unscrewed the old one from the wall, there are only 2 white wires coming out of the wall and into the back of the thermostat!
This information is designed to help you understand the function of the thermostat to assist you when installing a new one, or replacing or up-grading an old one.
That you are armed with a basic understanding of the temperature control system in your home, you should now be able to identify what kind of system you have, and what type of functions you will need if replacing or up-grading your existing thermostat.
They just get a little more sophisticated so if you are pre-wiring a new home, check with the contractor providing the hvac system as to what thermostat wiring is required.
Replaced the wire with 18/8 just in case and my question is can and should i plug in the g therminal on both thermostat and on the control fan center!
If possible, leave an equal amount of cable to make attachments with one either side of the thermostat.
This terminal is for a common connection from the control transformer that will provide steady 24 volt power between terminal r and c to power the thermostat itself.