I am looking for a manual. I have a Honeywell digital programmable thermostat, but cannot find the model #. It has 3 buttons on the side: up, down, and hold, and 3 blocks on the bottom: set clock, fan, and system. I tried Auto and then put the temp to 70 and pushed hold, but it goes up to 80. Should I just put the Fan "ON" then push hold at 70? Where can I get a manual. Thank you.