Honeywell thermostat connections for 1997 Bounder

[keskus100]

Hi, I have installed a Honeywell thermostat, but when I turn the heat on, both the a/c and heat come on. The a/c seems to work fine when I turn it on. Can anyone help with a proper wiring diagram?also, how do I add a picture to this post?
The model # on the t-stat is RTH221B1047. The closest one on the Honeywell site is the RTH2510B1000. They are pretty much identical.
Thanks.

[1492]

Moved from Forum Technical Support

[Old-Biscuit]

IS Fan control in AUTO??

IF that is not the issue then you need to post the Brand/model of:
A/C Unit
Furnace
Honeywell T-stat Model
AND WHAT was the old t-stat?????????????


As for the picture posting..........LINK