Fall Furnace Checklist: What to Do Before Winter
A fall furnace checklist for Minnesota homeowners: filter, vents, drain, CO alarms, humidifier, propane and a test run, plus what a $129 tune-up adds.
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Chanhassen tune-ups run $129 for a furnace or an AC and $219 for both, with a zoning check in the big vaulted two-stories. In the big two-stories we also look at how the thermostat and zone dampers handle a vaulted great room.
Chanhassen's two-stories from the 1990s and 2000s are now old enough that a tune-up is more than a filter change. On the furnace we check the inducer, igniter, flame sensor and condensate trap, and look at the humidifier pad and water panel, which scale up fast and, set too high, frost the great-room windows in January. We also check that the side-wall PVC pipes are clear, because drifting snow on the windward side can shut a high-efficiency furnace down.
On the air conditioner we clean the coil, test the capacitor and measure the temperature split. Builder-sized single-stage systems often cool the main floor and shut off before the upstairs catches up, so we look at the blower speed and the upstairs returns. For lake homes on Lotus and Minnewashta, we also check the condensate drain and float switch, which run hard in humid weather, and the lower-level dehumidifier if there is one.
Updated November 10, 2026
Each $129 visit covers cleaning, a safety and carbon monoxide check and a written report. Boilers, heat pumps and mini-splits fall in our $129–$349 maintenance range, confirmed when you book.
The humidifier setting that felt right in November is too high once it is well below zero outside. Indoor humidity should come down as it gets colder, roughly 25 to 35 percent in cold weather and lower in deep cold. At the tune-up we check the humidifier, test the humidity setting and tell you what to set on the control.
Sometimes. We check the blower speed, the filter, the coil and the temperature split, and we look at whether the upstairs has enough return air. If the AC is simply sized for the main floor, a tune-up will not fix that, and we say so. A variable-speed blower or a zone damper is the next step.
Signs your system is overdue for a tune-up
A fall furnace checklist for Minnesota homeowners: filter, vents, drain, CO alarms, humidifier, propane and a test run, plus what a $129 tune-up adds.
Read the guideBypass, fan-powered or steam: how each whole-home humidifier works, which fits a furnace or heat pump, what installs cost, and settings that keep windows dry.
Read the guideFurnace quit in a cold snap because the drain line froze? How to thaw it safely, stop it refreezing, and our $79 trip charge, waived with the repair.
Read the guideHeat out? AC quit? Call or send a request.