This post is going to be a bit of deflection, because the answer to the question is a simple one: Yes, your furnace works harder on colder days. It doesn’t work differently when it’s colder—the same principles of how the furnace heats and distributes air are at work. What makes the furnace work harder in cold weather is that it must run for longer to raise the interior temperature of your house to the target you need for comfort.
Now here’s where we deflect, because talking about your furnace working longer during cold weather needs some examination. The, ahem, cold fact we’re looking at is that you are probably making your furnace work harder than necessary on those cold days. This leads to higher energy bills, but it can also lead to a furnace that fails abruptly in the middle of one of the coldest days of the year. Knowing more about your furnace running on cold days can help you avoid emergency heating repair in Cincinnati, OH.
During fall, we stress the importance of our customers having maintenance for their gas furnaces. Maintenance takes care of many important steps to ensure the best performance from a furnace, but the most important benefit of maintenance is ensuring a furnace works safely.