HVAC in Fargo is a no-heat call until proven otherwise. Basement furnaces, older boilers with radiators that bang, and high-efficiency units that die when the condensate line freezes are the local fleet. The valley wind makes the load worse, but the season is long enough that a weak burner cannot hide. Say whether anything is heating. It is a burner, a limit, or a safety that has quit.
Look outside at the intake and exhaust while you are on the call in your head. Drifts and a termination aimed into the wind will shut a good furnace down. Filters in a dusty, closed-up house get pasted shut and then the heat exchanger runs too hot. Rooms over garages and bonus rooms on the south edge never catch up if the ducts were starved. Ask what was ruled out before a part is named. A thermostat in a warm hallway will lie about a cold bedroom.
If you smell trouble or someone has mentioned the heat exchanger, stop running the unit. That visit is about the flue, the combustion air, and whether the exchanger is intact. It is not a filter errand. Short cycling on a windy night can be draft or a flame sensor, and it can be something you should not guess at. Say how old the equipment is if you know, and whether you are in an older house with a boiler or a newer house with PVC pipes out the rim joist.
Replace before the deep cold if you have a choice. A no-heat day in Fargo is the whole house, not an uncomfortable evening. Ask for a load that includes the glass and the wind, not a copy of the old label. Ducts in cold attics and leaks at the basement trunk give new equipment away. Efficiency stickers compare a test. They do not promise a result on your fuel. Matched indoor and outdoor pieces matter if cooling is part of the change, and cooling here is the short other season.
Say the neighborhood, dead or weak, boiler or furnace, and whether ice is on the outside pipes. If the house is cold now, say that in the first breath. The heating season does not do wait-and-see. Call the number on this page.