Furnace Repair FAQ for Sioux Falls Homeowners

Yes. Residential no-heat calls are taken 24 hours a day, 7 days a week, including holidays. Call 605-800-7431 and have your 5-digit ZIP code ready so we can confirm availability for your address.

Check the thermostat mode, setpoint, and batteries; the furnace service switch; the breaker; and the air filter. If heat does not return, call us. While waiting, keep exterior doors closed, open cabinet doors under sinks on exterior walls to protect plumbing, and never heat the home with a gas range or unvented fuel heater.

Complete loss of heat in freezing weather, a gas smell, a sounding carbon monoxide alarm, a loud boom at ignition, or visible scorching or soot. For gas odor or CO alarms, leave the home first and call the utility or 911 before calling for repair.

Response depends on call volume and road conditions, which change quickly during a cold snap. We give you a realistic arrival window when you call rather than an optimistic one.

Yes, after-hours labor rates are higher than daytime rates. We tell you before dispatch, and you still approve any repair cost before work begins.

Common causes include a dirty flame sensor dropping the burner seconds after ignition, a failed hot surface ignitor, a thermostat fan set to ON instead of AUTO, a clogged filter causing a high-limit trip, or a gas supply problem.

The furnace may have locked out on a safety switch, lost low-voltage power through a blown control board fuse, or failed to prove flame. If one breaker reset and a clean filter do not restore heat, it needs diagnostics.

That is short cycling. Usual causes are restricted airflow, a dirty flame sensor, poor thermostat placement, a partially blocked vent, or an oversized furnace. It wears out parts quickly and should be diagnosed.

Thermostat mode, setpoint, and batteries; the furnace service switch; the breaker; the air filter; and whether the blower door panel is fully closed. These five checks resolve a meaningful share of no-heat calls.

A change in sound is usually the earliest warning of a failing motor or loose assembly. Squealing often means a bearing or belt issue, rattling can mean a loose panel or blower wheel, and a boom at start-up may indicate delayed ignition, which should be checked promptly.

That is common during the first few cycles of the season as dust burns off the heat exchanger and it should fade within an hour or two. A persistent burning, electrical, or acrid smell is not normal — shut the system down and call.

Reset it once. Repeated resets on a furnace that keeps failing hide the underlying fault and put unnecessary stress on ignition components.

Usually airflow: undersized or leaky ducts, closed or blocked registers, a clogged filter, or a thermostat located where it reads an unrepresentative temperature. These are solvable problems, not necessarily furnace failures.

Annually, ideally in early fall before sustained cold arrives. Homes with pets, remodeling dust, or heavy runtime benefit from extra filter attention through the season.

One-inch filters generally every one to three months during heating season. Thicker media filters typically last longer, but check them at least twice a season.

Weigh age, repair cost versus replacement cost, failure frequency over the last two seasons, parts availability, and how long you plan to stay in the home. A safety issue such as a cracked heat exchanger overrides the cost math.

Commonly 15 to 25 years with regular maintenance. The long South Dakota heating season puts more runtime on equipment than milder climates do.

Yes. Along with Sioux Falls, we serve homeowners in Brandon, Harrisburg, Tea, Hartford, Dell Rapids, Baltic, Crooks, Lennox, Canton, and Worthing.

Change filters on schedule, keep registers open, clear snow away from sidewall intake and exhaust pipes after storms, test carbon monoxide alarms, and have the system serviced before the first hard freeze.