[bridgetmurr48]

I need help wiring a 4 wire system red green blue and white. I am trying to wire a hunter thermostat and have a forced gas furnace/ac unit. I put red to rh with a jumper from rh to rc and green to g and white to w and blue to Y1. It will not work. Please help any info would be appreciated. It is getting hot and I need to get the air to come on. Thanks
Bridget

[hvac1000]

First
Did you write down where the old wires came off the old thermostat terminals? If so follow the install manual that came with your new thermostat.

[KISS]

With 4 wires, you can figure it out. I recommend turning of the furnace between each trial.
Connect only two wires at a time and figure out what turns on:
1. Fan
2. Heat followed by Fan within a few minutes
3. Just the outside AC unit
4. Nothing

RED GRN BLU WHT
0 0 1 1 ?
0 1 1 0 ?
1 1 0 0 ?
1 0 1 0 ?
1 0 0 1 ?

So fill in the table with the proper number 1-4 and we'll figure it out. If nothing comes on, then there is a problem with the transformer or small fuse in the furnace.

[wmproop]

Its probably the thermostat,, after 15 years I have yet to run across a hunter tstat that was worth the space it takes up in the garbage can