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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Only a few hundred homes make up Loretto, a city founded in 1886 and completely surrounded by the rural northwest corner of Medina, with County Roads 11 and 19 as its main streets.
We repair and replace furnaces, air conditioners, heat pumps, boilers and ductless mini-splits in Loretto 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: County Road 19 · County Road 11 · Highway 55
Book in LorettoLoretto is almost all single-family, and its eras sort by block. The oldest houses date from the decades after the 1886 platting: frame story-and-a-halfs and two-stories with steep roofs and small upstairs bedrooms, built long before gas service reached town. The forced-air systems that later replaced their original heat were fitted into whatever headroom and chimney location the old basement allowed, so furnaces sit in odd corners and supply runs to the second floor are few.
Postwar ramblers fill most of the remaining lots, with a few newer homes mixed in. The ramblers keep things simple: one trunk line, a furnace near the chimney or an outside wall and a condenser beside the house. Because Loretto is surrounded by Medina's farmland instead of other suburbs, many lots on the edge of town back onto open fields, and the prevailing northwest wind in winter hits those houses hard. Mature trees in the older blocks give the in-town houses more shelter than the edges get.
Open fields around Loretto mean snow drifts against the west and north walls of houses on the edge of town, which is exactly where a 96% furnace's PVC pipes often exit. When the intake plugs, the furnace locks out on its pressure switch. In the older story-and-a-halfs, heat collects in the upstairs bedrooms while the main floor runs cool, and cold air pours off old windows onto the floor. With so many furnaces here 15 to 25 years old, weak igniters and tired inducer motors show up in the first cold week.
Loretto has no lake, so summer humidity comes with the weather, and July dew points can make both an undersized and an oversized air conditioner miserable to live with. Many of the early-1900s houses never got central air, and window units are common upstairs. When a small house adds central air to an existing furnace, check the ductwork first: old trunk lines with open joints lose cool air into the basement instead of the bedrooms, and a single return can't pull the upstairs heat back down.
Loretto homes are on CenterPoint Energy gas and Xcel Energy electricity, which puts two sets of rebates in play. CenterPoint's heating rebates cover high-efficiency furnaces, boilers and thermostats, with any dealer. Xcel covers central AC, heat pumps and mini-splits, and many of those need an Xcel-registered contractor, so ask before choosing equipment. If you're looking at acreage just outside town in Medina, expect propane instead of gas, and the electric provider may change too.
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 Loretto and the rest of Hennepin County, about 19 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 not. A modulating furnace earns its price in larger or leakier houses where the heat demand swings widely. In a small, single-story home, a correctly sized two-stage 96% furnace delivers nearly the same comfort for less money. Put the difference toward fixing the ducts, which is where many older Loretto homes lose the most comfort.
It depends what failed. A dead igniter, flame sensor or pressure switch is a modest repair even on an older furnace, and we'll tell you so. A cracked heat exchanger, a failed inducer on a furnace past 20, or a string of repairs in one season usually points to replacement. You get a written flat-rate price for the repair before any work starts, so you can compare the two.
Usually. If the furnace blower is strong enough and the ductwork reaches the upstairs, a coil on the furnace and a condenser outside is the least expensive way to cool. We check blower capacity, static pressure and whether the second-floor rooms have supply and return air. If the upstairs has only one small duct, a ductless head there may cool better than trying to force more air up.
It changes who issues the permit, not our pricing. The permit comes from the city the house actually sits in, so a home inside Loretto and an acreage next door in Medina go through different building officials, even with the same mailing address. Gas and electric providers can change at the city line too, so we confirm the city and both utilities before quoting.
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 guideSEER2 replaced SEER on January 1, 2023 under a tougher DOE test, so the numbers read lower. What it measures, Minnesota's 13.4 minimum, and what's worth buying.
Read the guideHow long a furnace lasts in Minnesota: sourced 15–20 year figures, why long winters add wear, signs it's near the end, and how to decide repair or replace.
Read the guideBrands we service in Loretto: 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 Loretto? Call or send a request.