thinking of installing new thermostat,wondering if brand matters.And, any tipps of making project easy and painless . is there anything i should be aware of that would need special attention also, how can i check cooling fan to make sure it is working properly. it hasn't got hot in chicago area yet but do notice temp hitting 195 area not sure if this is normal or not,this is why i'm thinking of changing stat.thanks in advance you guy's hvave been great to have around.