A snow-covered two-story house illuminated by warm entrance lights during a nighttime snowfall.

HVAC Repair in Watertown, 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 Codington County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
A gray forced-air furnace with sheet-metal ductwork stands in an unfinished basement with exposed wooden joists, concrete walls, and a hanging incandescent bulb.

Nine months of heat, six below zero winters, and wind that doesn't let up

Your furnace in Watertown runs from September through May. That is nine months a year it has to work, and on winter nights that average 6°F it runs long and hard to keep the house warm. The igniter and the blower motor take the brunt of that. When one of them wears out you notice fast. The house won't hold heat, or the furnace won't start at all.

Summer is short here, just June through August, but afternoons averaging 79°F still put real load on your air conditioner's compressor. Codington County has also seen 46 winter storms and 63 damaging wind events over the past ten years. Wind like that can loosen an outdoor unit's connections or drive debris into it, so a system that ran fine before a storm may not after.

9 months
September through May, your system heats
3 months
June through August, it cools
6°F
the average winter night it heats against
79°F
the average summer afternoon it cools against
Isometric cutaway illustration of a small single-story house showing interior rooms with furniture, a furnace unit with attached ductwork running to a roof flue, and a dark shingled roof.
Your system heats September through May and cools June through August.

NOAA nClimDiv, 1991–2020 normals

An unfinished basement featuring exposed ceiling joists, a metal HVAC unit with round ductwork, a hanging light bulb, and scattered boxes and debris along the left wall.

A new furnace and air conditioner would cut about $120 a year off heating and cooling for a typical Codington County home.

  • A new furnace and AC$530 a year
  • An older furnace and AC$650 a year

Estimates for a typical Codington 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.

Codington County itself sets no HVAC rule. Whether a contractor needs a license for this repair depends on whether the house sits inside Watertown or another town, since each town sets its own rule and the county does not. That is different from a state test and a state record. Where a town requires a license, the protection is whatever that town checked before issuing it, and nothing beyond that.

For a heating and cooling repair, the gas connection is the part that matters most, since a loose fitting or a bad joint is the dangerous piece of the job. Whether anyone outside the contractor checks that connection depends on which town the house is in, since South Dakota itself has no license or inspector standing behind the work.

Source: South Dakota Legislature

Why is my heat not working?
The first thing to check is your thermostat, since a dead battery or a setting bumped to cool will stop your furnace cold. If that looks right, check your breaker panel and any switch near the furnace itself, since a tripped breaker or a flipped service switch cuts power without any other sign. Gas furnaces will also shut down if the pilot or igniter fails to light, and that needs a contractor to look at. With winter nights here averaging 6°F, a furnace that will not start is not something to leave for later.
Why is my system running but not cooling the house?
Check the air filter first. A filter clogged with dust blocks airflow across the coil, and when that happens the coil can freeze over and stop cooling the air even though the fan keeps running. Check that all your supply vents are open and unblocked too, since closed vents force the system to work against itself. If the filter is clean and the vents are open, the system may be low on refrigerant or have a failing part, and that calls for a contractor to check pressures and wiring.
What can I check before calling for HVAC repair?
Start with the thermostat. Make sure it is set to heat or cool as needed, the batteries are good, and the display is actually on. Then check your breaker panel for a tripped breaker and look for any shutoff switch near the furnace or outdoor unit that may have been bumped off. Check the air filter next, since a filter clogged with dust or pet hair is one of the most common reasons a system stops heating or cooling well. If the furnace uses gas, check that the gas valve is open and any pilot light is lit. If everything there looks normal and the system still is not working, a contractor will need to diagnose it, and in South Dakota the license required for that work depends on the city or town where the house is.