Furnace Heat Exchanger: What It Does & Why It Fails
October 18, 2025
If you’ve ever had a technician mention a furnace heat exchanger, you might’ve wondered what that actually means. At Sub Zero Temp Control, we talk about it a lot—because it’s
If you’ve ever had a technician mention a furnace heat exchanger, you might’ve wondered what that actually means. At Sub Zero Temp Control, we talk about it a lot—because it’s
If your furnace has been acting up lately, you’re not alone. Here at Sub Zero Temp Control, we’ve helped countless homeowners who suddenly find themselves without heat on a cold
If you’ve ever stared at your thermostat wondering how to switch from AC to heat, you’re not alone. Every fall, we get calls from homeowners who aren’t sure if their
If you’ve ever had your heat suddenly cut out on a freezing night, you know how stressful that can be. One of the sneakiest culprits I see out in the
If you’ve ever dealt with a furnace that won’t stay on, you know the frustration. Many times, the problem comes down to one small but crucial part: the furnace pilot
A common question I hear is, what is EM heat? (And no, it doesn’t mean “extra magic” heat — though some customers have guessed that before.) Homeowners usually spot that
If your home uses an electric furnace, you know how much you rely on it once that first cold snap hits. I see these systems every day, and most of
Few things are worse than turning on your system in the colder months and feeling a blast of cold air instead of heat. It makes you wonder why you suddenly
One of the questions I get from homeowners most often is, “how long do furnaces last?” It’s a smart question because a furnace isn’t just another appliance — it’s one
Curious about how large buildings keep indoor air fresh without wasting energy? One solution is the energy recovery wheel — a clever piece of HVAC technology that saves energy while
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