What Does the Blinking Light on My Furnace Mean?
The blinking light on a furnace is a fault code from the control board. How to read it safely, what common codes mean, and when a reset is fine or not.
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Orono is the largest city on Lake Minnetonka by area, taking in Crystal Bay, Stubbs Bay and Navarre along the water and large wooded lots that run north toward Highway 12.
We repair and replace furnaces, air conditioners, heat pumps, boilers and ductless mini-splits in Orono 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: Lake Minnetonka · Crystal Bay · Stubbs Bay · Big Island · U.S. Highway 12. Neighborhoods: Navarre · Crystal Bay
Book in OronoOrono's older housing is scattered rather than clustered. Around Navarre, Crystal Bay and Stubbs Bay, early lake cottages and mid-century lake houses survive between much larger modern homes, and those older places often got forced air long after they were built, once a boiler or space heaters stopped being enough. Mechanical space is tight, sometimes a crawlspace or a closet off the kitchen, and a replacement may need to be a horizontal or low-profile unit to fit.
The bigger change came in recent decades, as lakeshore rebuilds and new homes on inland acreage brought houses with several systems, in-floor loops and mechanical rooms that look almost commercial. A single estate might have a furnace per floor, a boiler for floor heat, a whole-house generator and an ERV. Equipment like that needs a record: what's installed, what each thermostat controls, and when each piece was last serviced. Without one, every service call starts with detective work.
Orono's lake-facing window walls are the first thing a cold snap finds. On open bays like Crystal Bay and Stubbs Bay, north and west wind off the ice pulls heat from the glass, and a humidifier setting that was fine in November fogs and frosts those windows by January. Turning humidity down as the temperature drops keeps the glass clear. Long, wooded driveways also mean snow and ice building up around side-wall vents and heat pumps that sit where nobody walks past.
Big lake homes in Orono take in a lot of afternoon sun through their view windows, and the cooling load in those rooms can outrun a single-stage AC. Variable-speed systems and shades help more than extra tonnage. Lower levels that open toward the lake stay humid, where a dedicated dehumidifier pays off. Older cottages near Navarre and the bays often have no ducts at all, and ductless heads are the practical way to cool them without opening walls.
Orono homes are on CenterPoint Energy gas and Xcel Energy electricity, so both utilities' programs apply. CenterPoint's heating rebates cover high-efficiency furnaces and gas boilers, including boilers that drive in-floor heat, plus smart thermostats, and you can use any dealer. Xcel's rebates include ground-source heat pumps, cold-climate air-source and mini-split heat pumps and cooling equipment; many need an Xcel-registered contractor, so ask before choosing.
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 Orono and the rest of Hennepin County, about 17 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.
For a garage or shop where gas reaches the building, a vented unit heater on its own thermostat is simple and dependable. A guest house that also needs cooling is a better fit for a ductless heat pump. Either way, a building that sits empty should have a thermostat that can send an alert if the temperature drops, so a failed heater doesn't become frozen pipes.
Multi-system houses often have zones that overlap. A lower-level floor heating loop, a basement furnace and an upstairs system can all react to the same afternoon sun and the same open stairwell. We check each system's airflow, settings and thermostat locations, then set them up so each one covers its own area instead of undoing another system's work.
Once a year each: furnaces and boilers before heating season, air conditioners and heat pumps before summer, plus the ERV or HRV, humidifier pads and any in-floor loop. Dual-fuel systems need both halves checked. On a big property it helps to keep one list of every unit, its age and what it serves, and we can write that up at the first visit so later calls go faster.
Often. Horizontal furnaces are built to lie on their side in crawlspaces and attics, and some low-profile models fit tight utility closets. The space needs clearance for service, a solid level base and a way to vent and drain condensate without freezing. If the crawlspace is damp or can't stay above freezing, a ductless heat pump or a furnace moved into an interior closet may be the better plan.
The blinking light on a furnace is a fault code from the control board. How to read it safely, what common codes mean, and when a reset is fine or not.
Read the guideMinnesota's state heat pump rebates still haven't launched. What's available in 2026 from Xcel, CenterPoint and the co-ops, and the rules for getting it.
Read the guideWhat Lennox PureAir and PureAir S actually do: a MERV 16 filter, UV-powered PCO for odors, the yearly parts, and how they compare with a plain media cabinet.
Read the guideBrands we service in Orono: 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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