Why Is My AC Freezing Up? Ice on the Lines or the Indoor Coil
Ice on your AC lines or indoor coil means too little airflow or too little refrigerant. What to do right now, what you can check, and when to call.
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St. Louis Park filled in fast after World War II, so its 36 official neighborhoods are full of 1940s and 50s story-and-a-halfs, ramblers and expansion homes on small lots between Minnehaha Creek and the Cedar Lake trail.
We repair and replace furnaces, air conditioners, heat pumps, boilers and ductless mini-splits in St. Louis Park and across Hennepin County. Every visit starts with a $79 trip charge and a written price before any work, and the $79 is waived when you go ahead with the repair.
Updated September 23, 2026

Around town: Excelsior & Grand · The West End · Wolfe Park · Westwood Hills Nature Center · Minnehaha Creek. Neighborhoods: Fern Hill · Lenox · Bronx Park · Texa-Tonka · Brooklawns
Book in St. Louis ParkBefore World War II, St. Louis Park was a small village along streetcar lines, and Fern Hill grew up beside the line on Minnetonka Boulevard; about half of its houses predate 1945. Those older homes have more in common with Minneapolis houses of the same age: some converted gravity ducts, some boilers, masonry chimneys serving the water heater. Then the population jumped from about 7,700 in 1940 to more than 43,000 by 1960, and the rest of the city filled with small postwar houses that had forced air from day one.
Since then, most new housing has been apartments and condos, including mixed-use projects such as Excelsior & Grand. For single-family owners, the practical split is prewar versus postwar. Prewar houses raise radiator, chimney and asbestos questions. Postwar houses bring small ducts, low basements, and upstairs half-stories that the ductwork never reached.
On St. Louis Park's narrow lots, snow has nowhere to go. It slides off steep story-and-a-half roofs into the gap between houses, right where the furnace's PVC vents and the gas meter usually are, and shoveling packs it in. A buried intake or exhaust shuts the furnace off. In the prewar houses around Fern Hill, converted gravity systems often have returns under the windows and supplies on inside walls, so rooms with big exterior walls lag behind; weatherstripping the old windows helps more than raising the thermostat.
Condensers on St. Louis Park's small lots end up in tight spots: a narrow side yard, behind the garage, a few feet from the neighbor's dryer vent. A condenser that breathes its own hot exhaust, or lint, runs hotter and wears out capacitors and fan motors sooner, so placement deserves a conversation at replacement time. Houses near Minnehaha Creek can hold more moisture in the basement, and a dehumidifier set at 50 percent lets the AC concentrate on the upstairs.
CenterPoint Energy (gas) and Xcel Energy (electric) run the standard rebates here: CenterPoint for high-efficiency furnaces and boilers with any dealer, Xcel for heat pumps and AC, some only through registered contractors. St. Louis Park adds its own Climate Champions for Homes cost share, which can add to utility rebates on cold-climate heat pumps and heat pump water heaters. It requires a Home Energy Squad planner visit before work begins and a rebate from Xcel or CenterPoint, and a furnace alone doesn't qualify.
Rebate programs change every year; check the utility's current terms before you buy. Our guides: Xcel and CenterPoint rebates, heat pump rebates, what happened to the federal credits.
Central Minnesota Heating and Cooling serves St. Louis Park and the rest of Hennepin County, about 5 miles from downtown Minneapolis. We repair and replace furnaces, central air, heat pumps, boilers and ductless mini-splits, and we're open 7 days, 7am–9pm. Call 612-429-3465.
A flat $79 trip charge, waived when you approve the repair. Written price before any work; same prices in every town we serve. Installed prices are on our pricing page.
Most 1940s and 50s story-and-a-halfs have no ducts to the upper rooms, so central air never reaches them. The simplest fix is one ductless mini-split head upstairs, with the line set run down an outside wall to a small outdoor unit. As a heat pump it also helps heat those rooms in spring and fall. New ducts through the knee walls are possible but messier and usually cost more.
The furnace maker's instructions and the mechanical code set the limits: distance from windows and doors, from the gas meter and air intakes, from the neighbor's house, and height above the snow line. On a narrow side yard that sometimes rules out the obvious spot, and the vent goes through the roof or out the back wall instead. We plan the route before quoting so the price holds.
Order matters. Book a Home Energy Squad planner visit first, since the city requires one within 36 months before any work starts. Then choose a cold-climate heat pump that qualifies for Xcel's rebate, because the city's cost share builds on a utility rebate. A 96% furnace can be part of the project only as the heat pump's backup. Keep the utility rebate paperwork, and check the city's current rules before you sign.
Usually not. Running new ducts through plaster walls in a 1920s or 30s house is costly and disruptive, and a working hot-water system gives even, quiet heat. If the boiler is old, a modulating condensing boiler sized to the radiators is the typical replacement. Cooling can be added separately with ductless heads or a small-duct system. Forced air makes more sense when you're gutting the house anyway.
Ice on your AC lines or indoor coil means too little airflow or too little refrigerant. What to do right now, what you can check, and when to call.
Read the guideHSPF2 is a heat pump's seasonal heating average; COP is its efficiency at one temperature. What matters at 5°F, and how to read a spec sheet or NEEP list.
Read the guideHVAC zoning gives each floor its own thermostat using dampers on one furnace and AC. Which Minnesota houses it suits, where it falls short, and what it costs.
Read the guideBrands we service in St. Louis Park: AirEase · Amana · American Standard · Ameristar · Aprilaire · Arcoaire · Armstrong Air · Bosch · Broan-NuTone · Bryant · Buderus · Burnham · Carrier · Champion · Coleman · Comfortmaker · Concord · Daikin · Day & Night · Ducane · ecobee · Frigidaire · Fujitsu · Gibson · Goodman · Google Nest · Gree · Heil · Honeywell Home · Lennox · LG · Lifebreath · Lochinvar · Luxaire · Maytag · Midea · Mitsubishi Electric · MrCool · Navien · NTI · Payne · Peerless · Rheem · Rinnai · RunTru · Ruud · Samsung · Santa Fe · Tempstar · Trane · Triangle Tube · Utica Boilers · Viessmann · Weil-McLain · Westinghouse · York
Heat out in St. Louis Park? Call or send a request.