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Yes, one wire to Rh and one wire to W. If you only got 2 wires, black and white doesn't matter.

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It will turn on the fan for several minutes (5 ?) if there is no activities in the past hour.

You may also set 2 programs to same temperature but slightly different time. For example P1 at 9:00am, P2 at 9:20am. And P3 at 6:00PM, P4 at 6:30pm.

I guess if you set it to fixed span (+/-0.3C) it will tends to overshoot (particularly if the climate is still not too cold). You may try to set it to 5 cycles/hour mode and it may track the...

You may also try to move the System slide switch from HEAT back to OFF and then HEAT again to see if it works. Open the unit and check if any wire (especially R and W) is loose.

HE setting is needed for electric furnace. HG is for gas furnace which will turn on the fan by itself.

Set to HG if your furnace will turn on the fan by itself (usually after a slight delay)
Set to HE if you furnace will not turn on the fan and need the thermostat to specifically turn it on also.

a. No
b. Yes
c. No
d. Depending on models

'4' is probably same as RH. You can try using the jumper to connect Rc and Rh to see if it work.

I think this thermostat does not support heat pump + furnace.

Also different day of week can have different program setting. So check the program for the weekday in question to see if it is what you want.

If you still remember the where the 4 wires were connected to the White Roger thermostat, take note of the name of the terminals the 4 wires are connected to. That may help as sometime the colour of...

Probably the 2 leads of the temperature sensor (probably blue colour) sticking out at the bottom back of thermostat(when you removed it from wall) is shorted together. Gently separating the 2 leads...