I have just installed my quad-7100 in my new house, but I have one problem... the fan just turns off and on randomly while burning a good hot fire, it will never stay on for more than a few minutes. The only way I can avoid listening to it turn off and on all the time is by turning the override 'on' and turn the fan to a really low setting, otherwise the dang thing will just turn on full speed every few minutes and turn back off... even if I have the override 'on' with the adjustable nob clicked off. What do you think? Everything is brand new!