HVAC Repair in Yankton, 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 Yankton County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work, most of it in the cold
Your furnace runs from October through May in Yankton County, and winter nights average 13°F through December and into February. At that temperature the burner cycles on and off for hours at a time to hold the house steady, and every start puts wear on the igniter and the flame sensor. When one of those parts finally gives out, the furnace either won't light or shuts itself off partway through a cycle.
Summer is short here, just June through August, but afternoons average 83°F and the air conditioner has to work through it on its own schedule. The county has also logged 35 winter storms and 62 damaging wind events over the past ten years, and wind like that can knock an outdoor condenser out of alignment or drive debris into it.
- 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

NOAA nClimDiv, 1991–2020 normals
A new furnace and air conditioner would cut about $100 a year off heating and cooling for a typical Yankton County home.
Estimates for a typical Yankton 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 does not test or license HVAC contractors at the state level. Whatever rule applies to a repair in Yankton County comes from the city or town where the house sits, not from the state. Some towns keep their own license requirement for contractors working there. Others have no such rule at all, and in that case there is no local record either.
On a heating and cooling repair, the gas connection is the part that has to be right, since a bad connection is the dangerous part of the job. Whether anyone checks that connection depends on the town, since South Dakota leaves that oversight to local rule rather than a state one. Where the town has no such rule, the protection on this job comes down to which town the house is in.
Source: South Dakota Legislature
- Why is my heat not working?
- Start with the thermostat and the power to the furnace. If the thermostat screen is blank or set below room temperature, that alone will keep the heat from turning on. Check the breaker and the furnace switch, which looks like a light switch near the unit. If those are fine and the furnace still won't fire, the igniter or the flame sensor is often the cause, and those need a contractor to test and replace. At 13°F on a winter night here, it's worth checking this as soon as you notice the house isn't warming up.
- Why is my system running but not cooling the house?
- If the blower is running but the air isn't cold, check the filter first. A filter clogged with dust blocks airflow across the coil, and the coil can ice over as a result. If the filter is clean and the air still isn't cold, the system may be low on refrigerant, which points to a leak somewhere in the coil or lines. That's not something to chase down yourself. A contractor needs to check pressures and find the leak before adding refrigerant does any good.
- What can I check before calling for HVAC repair?
- Check the thermostat first, including the batteries if it uses them and the setting itself. Then check the filter, since a dirty filter can cause both weak heat and weak cooling. Look at the breaker box and any switch near the furnace or outdoor unit to rule out a simple power issue. If the outdoor unit is covered in leaves, ice, or debris after a storm, clearing that away can also solve the problem on its own. Anything beyond that, like a part that's failed inside the unit, is a job for a licensed contractor.


