Hi, I had replaced a new Noma 5+1+1 thermostat last winter, our furnace ran OK with temp control. Today, when I trun on the cool air conditioner, the a/c is on but the blower does not respond. If I turn off the automatic cool a/c switch, I can manually turn on the blower. I do believe there must be wiring problem. There are H2, H1, B, O, RC, RH, G, Y, W connector on the switch and I have connected the 5 wires to
RC [ red wire ]
RH [ black wire ]
G [ green wire ]
Y [ brown wire ]
W [ white wire ]
Can someone advise the correct wiring so that my cool a/c can be turned automatically.

Do I need to jump wire to the B , O connector ?

Thanks,
:Ed

Did you jumper from Rc to Rh ? Not familiar with Noma but the jumper is normally need on a furnace that has a single 24 v transformer. With out a jumper your cooling circuit has not power. If you have just one transformer give the jumper a try, bet you'll be cool soon. Any chance of getting instructions from Noma? Noma Thermostat - electronics-101.com

My cooling system is working now, thanks ballengerb1