An ice-covered tree branch with dangling icicles in the foreground, with a snow-dusted house and frozen shrubs blurred in the background.

HVAC Repair in North Sioux City, SD

Homes here need heat from October through May and cooling from June through August. If your system quits, tell us what it's doing and a licensed contractor who covers Union County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An unfinished basement featuring concrete block walls, exposed floor joists, a bare concrete floor, and a forced-air furnace with a large metal exhaust duct in the corner.

Eleven months of work a year, in weather that swings hard

Your furnace carries the load from October through May, and your air conditioner takes over for June through August. That leaves the system only one real month of rest. Winter nights average 13°F, cold enough that the burner has to cycle on and off through the night to hold the house steady, and each start is a small shock to the igniter. Summer afternoons average 83°F, and the compressor runs long stretches to keep the house cool, which wears on the parts that keep it running.

The area has also seen 31 winter storms and 63 damaging wind events over the past ten years. Wind that strong can knock an outdoor condenser out of alignment or drive debris into it, and a storm that cuts power will stop a furnace's blower motor cold even if the gas is still on.

8 months
October through May, your system heats
3 months
June through August, it cools
13°F
the average winter night it heats against
83°F
the average summer afternoon it cools against
Isometric cutaway illustration of a small house with a dark shingled roof, showing an interior furnace unit, ductwork, and a flue pipe extending through the roof.
Your system heats October through May and cools June through August.

NOAA nClimDiv, 1991–2020 normals

An unfinished concrete basement containing a gas furnace with sheet-metal ductwork, utility shelving, and exposed overhead joists.

A new furnace and air conditioner would cut about $100 a year off heating and cooling for a typical Union County home.

  • A new furnace and AC$540 a year
  • An older furnace and AC$640 a year

Estimates for a typical Union County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, South Dakota fuel prices and NOAA climate normals. Your home will differ.

Repair makes sense when one part has failed.

Replacement makes sense when the furnace's heat exchanger is cracked, the air conditioner's compressor has failed, or repairs keep coming.

In South Dakota, HVAC licensing for homes is left to the cities and towns.

South Dakota keeps no state license for HVAC contractors. Whether one is required on this job depends on Union County's own city or town, since the state has left that rule to the municipalities. There is no state record to check either way, only whatever the local government has set up where the house sits.

For a heating and cooling repair, that means the license, if there is one, comes from the city rather than the state. Gas connections are the part of this kind of repair where a bad joint or a bad seal turns dangerous, and in South Dakota there is no statewide license covering that work either. Whatever oversight exists here comes down to what the local government requires, not a rule set by the state.

Source: South Dakota Legislature

Why is my heat not working?
Start with the thermostat. Check that it is set to heat and the temperature is above room temperature, since a setting left over from summer is an easy thing to miss. If the thermostat looks right, check the breaker for the furnace and the filter, because a filter clogged enough can cause the system to shut itself off. Gas furnaces also have an igniter and a flame sensor, and either one failing will stop the burners from lighting even though the blower still runs. With winter lows here averaging 13°F, a furnace that will not fire is not something to wait out, so if the basics check out it is worth getting a contractor out the same day.
Why is my system running but not cooling the house?
The most common cause is a dirty filter or something wrong with the outdoor unit, not the compressor itself. If the filter is clogged, the coil inside can freeze up and stop pulling heat out of the air, so the blower runs but the air coming out is not cold. Outside, check that nothing is blocking the condenser unit, no leaves, no grass clippings, no fence panel too close to it, since it needs open airflow to release the heat it is pulling from the house. If the filter is clean and the outdoor unit is clear and it is still not cooling, the system likely needs a technician to check the refrigerant charge.
What can I check before calling for HVAC repair?
Check the thermostat first, including the batteries if it uses them, then check the breaker for the furnace or air conditioner. After that, pull the filter and hold it up to a light. If you cannot see light through it, replace it, since a blocked filter is behind a lot of the no-heat and no-cool calls a contractor gets. For the outdoor unit, walk out and look for anything blocking it, especially after one of the wind events this area gets fairly often. If all of that checks out and the system still is not working, describe what you found when you call, since it will help the contractor figure out what is wrong faster.