What Does It Mean When a Furnace Is Red-Tagged?
A red tag means a technician or the gas utility found your furnace unsafe and shut it off. Common reasons, what not to do, and how to get a second opinion.
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Central Minnesota Heating and Cooling repairs and replaces furnaces, ACs, heat pumps and boilers in Nowthen (Anoka County), about 26 miles from downtown Minneapolis.
Nowthen got its name from postmaster James Hare's habit of saying "Now, then," and the former Burns Township is still fully rural: about 4,500 people spread across 35 square miles.
Connexus Energy supplies electricity across Nowthen, while natural gas availability and the gas company depend on your address.
Updated October 21, 2026 · By Eric Brown, owner, Central Minnesota Heating and Cooling

Around town: Nowthen Threshing Show grounds · Minnesota Highway 47 · Viking Boulevard (County Road 22) · Nowthen Memorial Park · Twin Lakes City Park
Book in NowthenBurns Township split from St. Francis Township in 1869 and spent most of the next century as a rural township of several hundred people. The farmhouses left from those decades usually started with a wood or coal furnace or a boiler; ductwork, a gas or propane furnace and air conditioning came later, one project at a time. The Nowthen Threshing Show, an August tradition for more than 50 years, celebrates that farm past on its grounds off Old Viking Boulevard.
Housing came in waves after 1970: 1,129 residents that year, 1,976 in 1980, 3,557 in 2000 and 4,443 in 2010. Most 1970s and 80s houses here have gone through two or three furnaces, and the 1990s and 2000s two-stories are reaching the age when original furnaces and air conditioners need replacing. In 2008 the township became the City of Nowthen to head off annexation, and the 2020 census still counted every resident as rural.
When Connexus Energy interrupts a dual-fuel heat pump or electric heat during peak demand, the propane or gas furnace becomes the only heat in the house, sometimes for hours. A propane furnace that has barely run since spring needs a fall check so it lights on the first call: a clean flame sensor, a working igniter, a clear vent and a thermostat set to switch over automatically. Keep the propane tank fuller than usual in January, since interruptions shift more of the load onto the furnace.
Connexus' Wi-Fi PowerNap program can cycle an enrolled air conditioner through a smart thermostat during the June-to-August control season, in exchange for a rebate. Large two-stories on open lots take a lot of afternoon sun, so if you enroll, cool the house a little below your usual setting in the morning and let it drift during the event. A right-sized system with clean coils handles that easily; an oversized one short-cycles and leaves the air clammy. Window units don't qualify for the program.
Connexus Energy supplies electricity across Nowthen, so its programs apply citywide: heat pump rebates (air-source, ductless and ground-source), a central AC rebate, a reduced-rate dual-fuel program that accepts a propane, natural gas or oil furnace as backup, and the Wi-Fi PowerNap program. Check whether each rebate calls for a registered contractor. Homes with natural gas should check the gas company on their bill for furnace rebates. Minnesota's HEAR and HOMES rebates had not launched as of mid-2026, so check before planning around them.
Rebate programs change every year; check the utility's current terms before you buy. Our guides: heat pump rebates, what happened to the federal credits.
Central Minnesota Heating and Cooling, owned by Eric Brown and in business since 2009, serves Nowthen and nearby towns in Anoka County, about 26 miles from downtown Minneapolis. We're open 7 days, 7am–9pm, and no-heat calls get priority. Call 612-429-3465.
An HVAC service call in Nowthen is a flat $79 trip charge, waived when you approve the repair. You get a written price before any work. Installed prices are on our pricing page.
Yes. Nowthen is split between two ZIP codes it shares with neighbors, 55303, which Anoka also uses, and 55330, Elk River's, so some Nowthen houses carry a neighboring city's name on their mail. We go by where the house is, and the price list is the same everywhere we work, with no mileage charge. Give us the street address when you call 612-429-3465.
More than you might expect. Connexus Energy has rebates on ductless heat pumps, which can take over most of the heating room by room and add cooling. Its dual-fuel program can put electric heat, including baseboard, on a reduced rate when it's paired with an automatic backup burning propane, natural gas or oil. There's also an electric heat storage program. The dual-fuel and heat storage programs need a state electrical inspection, so ask Connexus about current terms.
Usually because the addition was tied into a heating system sized and ducted for the original house. A single long duct run, no return air and a floor over a crawlspace or slab leave it short of heat. A single-zone ductless heat pump gives the addition its own heating and cooling, and Connexus offers ductless rebates. Insulating the floor and sealing the joint between the old and new walls helps whatever heat it gets.
Not for Connexus Energy's dual-fuel rate. Connexus excludes wood stoves and portable heaters as the alternate source; the backup has to start automatically from the thermostat and be able to heat the home for up to 400 hours. In practice that means a propane, natural gas or oil furnace or boiler sized for the house. The wood stove can still take the edge off, but it can't be what the program counts on.
A red tag means a technician or the gas utility found your furnace unsafe and shut it off. Common reasons, what not to do, and how to get a second opinion.
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 guideElectric furnace vs heat pump in Minnesota: why resistance elements cost most, how an add-on works, co-op programs, and $7,500–$14,500 installed prices.
Read the guideBrands we service in Nowthen: Carrier · Trane · Lennox · Goodman · Rheem · Mitsubishi Electric · Daikin · American Standard · Navien · Weil-McLain · and every other major brand
Heat out in Nowthen? Call or send a request.