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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A furnace or AC tune-up in Deephaven starts at $129, and both together are $219. We test and clean each system. Boiler visits are priced within the $129–$349 maintenance range.
A Deephaven house often has several generations of equipment. Houses built from 1930 to 1960 usually began with a single basement furnace sharing a chimney flue with the water heater, so the tune-up checks the flue connector, draft and any rust, plus the ducts and returns that have outlived several furnaces. Older lake houses on hot-water heat get the boiler, circulators, expansion tank and relief valve checked before the first hard cold.
Most Deephaven homes still draw water from private wells, which matters for humidifiers: mineral scale builds up on the pad and water panel, so we check and clean it. Lake humidity means the condensate drain runs nearly nonstop in July and August, so we clear the line and test the float switch. On the AC we clean the coil, test the capacitor and check the charge, and we look at the lower-level dehumidifier if the house has one. A short-cycling AC cools the main floor without drying the basement.
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. With so much shoreline, many Deephaven houses face open ice all winter, and a northwest wind across a frozen bay finds every gap on the lake side.
Most homes in Deephaven draw from private wells, and well water carries minerals that coat the humidifier pad and water panel. A scaled pad does less, and the unit can leak or run constantly. We clean or replace it at the tune-up and set the humidity lower as the temperature drops.
We check the burner and controls, the circulators, the expansion tank, the relief valve, the pressure and the venting. We also look for leaks and test the thermostats and zone valves. We confirm the price for your equipment when you book.
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.