A furnace blowing cold air in Pueblo is usually one of a few things: the pilot light or igniter has failed and the burners are not lighting, the flame sensor is dirty and is shutting the burners off after a few seconds, the heat exchanger has a crack causing the system to shut down as a safety measure, or the thermostat is set to fan-only instead of heat. Our technicians will run through the full diagnostic to find the actual cause.

A banging or booming sound when your furnace starts in Pueblo is often caused by delayed ignition, where gas builds up before igniting and causes a small explosion in the combustion chamber. This is not something to ignore. it puts stress on the heat exchanger and can cause cracks over time, which is a carbon monoxide risk. Have it looked at before the next heating season if not sooner.

Older heat pumps lose heating efficiency significantly as outdoor temperatures drop below freezing. This is a well-known limitation of standard heat pumps. If your Pueblo home’s heat pump is struggling in cold weather, it may be switching to emergency heat (resistance heating) which is less efficient and more expensive to run. Modern cold-climate heat pumps handle lower temperatures much better. Our technicians can assess whether your system needs repair or whether replacement with a more capable unit makes sense.

The same 5,000 Rule that applies to AC applies to furnaces: multiply the system’s age by the repair cost. Above $5,000 and replacement often wins. A Pueblo furnace that is over 20 years old, has already had major components replaced, or is requiring increasingly frequent repairs is probably telling you something. WireNut will give you honest numbers on both options.

Yes. Boilers are common in Pueblo’s older housing stock and WireNut’s technicians are trained to work on them. We diagnose and repair boiler pressure issues, pilot problems, zone valve failures, pump issues, and radiator imbalances. If your boiler is beyond economical repair, we handle replacement as well.

A WireNut heating tune-up in Pueblo includes inspecting and cleaning the burners, testing the igniter and flame sensor, checking the heat exchanger for cracks, measuring combustion efficiency, testing safety controls, inspecting the flue and exhaust, checking the blower motor and belt, and testing the thermostat response. It is the kind of inspection that catches small problems before they become cold-night emergencies.

No. If your carbon monoxide detector is alarming near your furnace, get everyone out of the house including pets, leave the door open, and call us. Do not try to reset the furnace or run it again. A CO alarm near the furnace can indicate a cracked heat exchanger, which is a genuine safety emergency. WireNut will get to you fast.