Hello all--I have a Rheem hot air system in my ranch home--and i just installed a new honeywell Thermostat its a 2 wire system--nothing fancy--All works good--I was wondering what would happen if i went on vacation for a week in the winter--and the Thermostat shorted out and kept the heat on--what safety would shut the burner down?? I know this doesnt happen often--but what if it did?? My old RITETEMP digital stat--did just that--But we were home--We set the heat for 70 degs and an hour later it was over 80 in the house and the burner was still running!!! Thanks for any info...