When the house won't hold 70 in January, the fear is a $6,000 furnace. The reality in most Omaha homes, especially the mid-century ones in Millard, Benson and Dundee, is something much further down this list. Work through it in order.
1. Change the filter (free – $20)
A clogged filter is the number-one cause of weak heat and short-cycling. If you can't remember changing it, that's your answer. Monthly in winter if you have pets.
2. Check the thermostat and vents (free)
Make sure the thermostat is on heat and the fan on auto, fresh batteries if it takes them. Then walk the house: furniture and rugs over supply vents, and closed vents in "unused" rooms, throw the whole system off balance.
3. Open up the returns (free)
Return air grilles blocked by couches or boxes starve the furnace. It can only push out as much air as it pulls in.
4. Get a tune-up ($80 – $150)
An annual furnace tune-up cleans the burners and flame sensor, checks the igniter and heat exchanger, and catches the part that's about to die in the fall instead of at 2 a.m. in January. If the furnace runs but the house stays cold, this visit usually finds out why.
5. Clean the ducts if they've never been done ($300 – $600)
Not an every-year job, but if you just bought an older home, had major renovation dust, or airflow from the vents feels weak everywhere, duct cleaning plus sealing obvious leaks in accessible runs can noticeably improve what reaches the far rooms.
6. Fix the envelope, not the furnace ($200 – $3,500)
If the furnace runs constantly and the house still feels drafty, the furnace probably isn't the problem. Weatherstripping, caulking and attic air-sealing are a cheap weekend with a handyman, and an attic insulation top-up is the single highest-ROI comfort upgrade in Omaha's older housing stock. A right-sized furnace in a leaky house will never win.
7. Then, and only then, talk replacement
A furnace at 15 to 20+ years with a major repair on the table (igniter and blower motor are borderline; a cracked heat exchanger is final) is a fair candidate. Get multiple quotes, ask each contractor to size the unit with a load calculation rather than matching the old one, and do the insulation first so you can buy the smaller furnace.
Book the tune-up in October, before the first cold snap, when HVAC calendars are still open and you're not paying emergency rates. Steps 1 through 4 solve most "furnace can't keep up" winters for under $200.