Ok I need to hook up 24vac from the transformer that is in the furnace, so the thermostats will work on ac power rather than the battery.There is one red wire coming from this transformer in the furnace which go to RH in the thermostat which is 24vac. I need the other side of the transformer which will go to the common in side the thermostat.
Then the thermostat will run on ac power and the remote will work. But I can't fine the transformer. And there is also a reset button inside the furnace. Would like to know where it is at {Hard to fined}

Any screw located in the furnace is common ground, hope this helps

I am in malysia so I need to help with my english grammar