It is often cheaper to replace a furnace and AC together. However, it depends on the specific situation. For example, if the furnace only needs a new air filter and the AC only needs a new capacitor, then it would likely be cheaper to just replace those parts rather than the entire system.
It can be cheaper to replace furnace and AC together, but it really depends on the specific situation. For example, if the furnace is very old and needs to be replaced anyway, then it might make more sense to just go ahead and replace the AC unit at the same time. However, if the furnace is only a few years old and still in good condition, then it might be more economical to just replace the AC unit. In general, it's always a good idea to get quotes from several contractors before making a decision about replacing either the furnace or the AC unit. That way you can be sure you're getting the best possible deal.
