HVAC Repair in Sisseton, SD
Homes here need heat from September through May and cooling from June through August. If your system quits, tell us what it's doing and a licensed contractor who covers Roberts County will get in touch.
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Nine months of heat, and nights near zero
Your furnace is the machine that matters most in Sisseton. It runs from September through May, and on the coldest nights, when the temperature drops to 6°F, it cycles on and off for hours to keep up. Almost half the homes here heat with propane, and a furnace working that hard puts steady wear on the igniter and the blower motor. When the igniter finally goes, the burner won't light at all.
Summer asks less of a system here, just three months of cooling with afternoons around 80°F, but Roberts County sees real storm weather. Ten years of records show 54 winter storms and 115 damaging wind events. Wind can knock debris into an outdoor condenser or tear at its fins, and a hard freeze during a winter storm can crack a component that was already weak. When the system won't start after a storm, that is usually where to look.
- 9 months
- September through May, your system heats
- 3 months
- June through August, it cools
- 6°F
- the average winter night it heats against
- 80°F
- the average summer afternoon it cools against

NOAA nClimDiv, 1991–2020 normals
A new furnace and air conditioner would cut about $230 a year off heating and cooling for a typical Roberts County home.
Estimates for a typical Roberts 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 statewide license for HVAC contractors. Whether a license applies to this job depends on the town where the house sits, since that is where the rule comes from if one exists at all. There is no state record to check either way.
For a heating and cooling repair here, that means the license itself is not what stands behind the work, because in most of the state there is not one. Gas work carries real risk because a bad connection is what makes it dangerous, and South Dakota's rule leaves the question of who checks that connection to the city or town rather than answering it statewide.
Source: South Dakota Legislature
- Why is my heat not working?
- Most no-heat calls come down to the thermostat, the igniter, or the flame sensor. If the furnace runs but never lights, the igniter or flame sensor is usually the problem. If it does not run at all, check that the thermostat has power and is set to heat, and check the breaker and the furnace switch. Nearly half the homes in Sisseton heat with propane, so if you smell nothing at the tank or the gauge reads empty, that is worth ruling out before anything else. With winter lows here averaging 6°F, a furnace that is not lighting needs a contractor out quickly.
- Why is my system running but not cooling the house?
- If the blower is running but the air is not cold, the most common cause is a dirty air filter or a frozen evaporator coil. A clogged filter starves the coil of airflow, and the coil ices over, which cuts cooling even though the fan is blowing. Another cause is low refrigerant from a leak, which a contractor has to find and repair rather than just top off. Check the filter first since that is the one thing you can rule out yourself. Summer afternoons here run around 80°F, so a system stuck like this needs attention the same day.
- What can I check before calling for HVAC repair?
- Check the thermostat first. Make sure it is set to the right mode and has power, since a dead battery or a tripped setting can look exactly like a bigger problem. Next check the air filter and swap it if it is dirty, since restricted airflow causes both heating and cooling complaints. Then check the breaker for the system and, if it is a furnace, make sure the switch nearby is on. If those all check out and the system still is not heating or cooling right, a contractor will need to look at it directly. South Dakota leaves HVAC licensing to the city, so who is licensed to do the repair depends on where the house sits.


