AC Leaking Water Inside the House: Causes and What to Do
Water by the furnace in July? What's normal dripping and what's a leak, the usual causes (drain, pump, iced coil, cracked pan), and what to do right now.
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Spring Lake Park is a small, built-out city on Highway 65 that reaches into Ramsey County, and because its population has barely changed since 1970, most of its houses date from the 1950s and 60s.
We repair and replace furnaces, air conditioners, heat pumps, boilers and ductless mini-splits in Spring Lake Park and across Anoka 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.
Gas service in this part of the north metro can differ by street (neighboring Blaine is split among CenterPoint Energy, Xcel Energy and Centennial Utilities), so check the name on your gas bill.
Updated September 23, 2026

Around town: Spring Lake · Highway 65 · Lakeside Lions Park · Able Park · Terrace Park
Book in Spring Lake ParkSpring Lake Park is small, with about 3,000 homes, and nearly all of them were built within a couple of decades. The city incorporated in 1953, its population doubled during the 1960s to about 6,400, and it has added fewer than 800 residents in the half-century since. So the typical house is a 1950s or 1960s rambler or split-entry that has been lived in and updated by several owners.
What those updates left behind is what we work around. A basement finished in the 1980s may have boxed the furnace into a closet. A kitchen remodel may have moved or covered a supply register. An addition off the back often got a single duct tapped off the nearest branch. None of it is unusual, but it means the house we measure for a new furnace or AC may not match the one the original ducts were designed for, which is why we measure instead of copying the old nameplate.
Additions are where Spring Lake Park houses lose the winter fight. A back-room addition over a crawlspace or slab, with one supply tapped off the nearest branch, can run noticeably colder than the kitchen on a subzero night. Sealing and insulating that duct, insulating the crawlspace and giving the room a return path usually help, and a small ductless heat pump is the fallback. In the main house, a furnace boxed in during a basement finish needs enough combustion air to burn cleanly.
Where mature trees shade Spring Lake Park's 1960s streets, they help in July by keeping roofs out of the afternoon sun. The trade-off is what falls from them: cottonwood fluff, seeds and leaves collect on condenser coils and in the base of the unit. On houses where central air was added to heat-only ductwork, the indoor coil often gets marginal airflow, and a clogged filter or dirty coil is enough to freeze it. A clean filter in June and a coil rinse go a long way here.
Electricity in Spring Lake Park comes from Xcel Energy, so AC, heat pump and mini-split rebates go through Xcel, and some require an Xcel-registered contractor. Gas is less settled. Xcel doesn't list Spring Lake Park among the cities where it supplies gas, which points to CenterPoint Energy for most homes, but check the name on your gas bill. CenterPoint's furnace rebates allow any dealer and must be filed in the same calendar year as the install.
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 Spring Lake Park and the rest of Anoka County, about 9 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.
Often, but check first. Most smart thermostats need a common wire, the C-wire, for steady 24-volt power, and older heat-only or heat-and-AC setups may have only two or four conductors with none spare. Options include using an unused conductor at the furnace, an add-a-wire adapter, or pulling new thermostat cable. A heat pump needs more conductors than a furnace, so plan wiring before switching.
Not in a 1-inch slot without checking. A dense 1-inch filter can choke airflow on an older blower, which overheats the heat exchanger in winter and can freeze the AC coil in summer. The better setup is a media cabinet that holds a 4- or 5-inch filter, giving far more surface area with less resistance. We check static pressure before and after so the blower isn't strained.
A furnace from the 1960s can still light, but after 60 winters the heat exchanger is the concern, since a crack can leak carbon monoxide into the air stream. Signs of a very old unit include a standing pilot flame and no inducer motor. Have it inspected, make sure CO alarms sit within 10 feet of each bedroom, and plan a replacement. A technician will shut off a furnace that isn't safe to run.
Often. A compact one-story house with a basement has a modest heating load, so a heat pump sized for summer cooling can carry much of the spring and fall heating, with the gas furnace taking over in real cold. If the heat pump ends up doing most of the heating, ask Xcel about its reduced space-heating rate. Check two things first: thermostat wiring, since a heat pump needs more conductors, and room in the electrical panel.
Water by the furnace in July? What's normal dripping and what's a leak, the usual causes (drain, pump, iced coil, cracked pan), and what to do right now.
Read the guideHiring for a furnace or AC in Minneapolis? Check the DLI bond and city license, the permit, a Manual J, a written quote and warranty, and the red flags.
Read the guideWater around the furnace in July? How the AC condensate drain works, the order to check it in, how to clear a clog, and when a pump or trap is to blame.
Read the guideBrands we service in Spring Lake 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
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