Carrier Furnace Error Codes: What the Blinking Light Means
Carrier furnace error codes from the maker's own troubleshooting guides: how to count the flashes safely, what each code means, and when to call a tech.
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Since 2009
Furnace, air conditioner, boiler, heat pump and mini-split service across Minneapolis, Saint Paul and 135 more Twin Cities-area towns within about 50 miles. $79 trip charge, waived when you approve the repair.
Central Minnesota Heating and Cooling is a Twin Cities HVAC company owned by Eric Brown. We are open 7 days, 7am–9pm, at 612-429-3465, and have repaired and replaced furnaces, air conditioners and boilers in Minneapolis since 2009. From the city we work in every direction out to about 50 miles, including Saint Paul, the Lake Minnetonka towns, Watertown and the Crow River, Elk River and Monticello, Northfield and Red Wing, and Hudson and River Falls across the St. Croix. The price list is the same in all of them.
A service call starts with a $79 trip charge. The technician finds the fault, shows you what failed and writes down the price before touching anything. Repairs carry a 1-year parts-and-labor warranty; new installs carry 2 years on labor on top of the manufacturer's parts coverage.
Most calls fall into three buckets: furnace repair for no-heat and short-cycling problems, AC repair for systems that run but don't cool, and furnace and AC tune-ups to catch problems before the season starts.
Minnesota is hard on equipment. A furnace here runs from October into May, condensing furnaces can ice up their vent pipes in a cold snap, and a humid July finds every undersized air conditioner. We size replacements with a Manual J load calculation instead of copying the old nameplate.
Updated November 10, 2026

Much of Minneapolis was built before 1940, and it shows in the basement. We work on converted gravity systems with oversized ducts, hot-water and steam boilers feeding cast-iron radiators, 80% furnaces sharing a chimney with the water heater, and story-and-a-half bungalows whose upstairs never got a duct. Newer condos and townhomes downtown and in the North Loop bring their own puzzles: tight mechanical closets, rooftop condensers and ductless mini-splits.
Gas in Minneapolis comes from CenterPoint Energy and electricity from Xcel Energy, so rebate paperwork usually runs through those two programs, and replacements need a City of Minneapolis mechanical permit.
Neighborhoods we cover: Linden Hills · Longfellow · Nokomis · Northeast · Powderhorn · Uptown and every other Minneapolis neighborhood. Minneapolis service details
Most Saint Paul houses predate 1950. The Victorians around Summit Hill and Cathedral Hill are often still heated by steam or hot-water radiators, and many 1910s and 1920s bungalows were converted to forced air long ago on their original ducts. Natural gas comes from Xcel Energy, and the price list is the same written, flat-rate one we use in Minneapolis. Saint Paul service details

Repair, replacement and maintenance for the equipment that heats and cools Minnesota and Western Wisconsin homes, plus light-commercial rooftop units.
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The technician who diagnoses your system is the one who explains it: what failed, what it takes to fix, what it costs, and when a replacement makes more sense than another repair. It's all in writing, so you can take the quote to someone else if you want a second opinion.
870+ Google reviews at 4.9 stars. Read them before you call; that's what they're there for.
Request Service| System | Installed range | What moves it |
|---|---|---|
| Furnace replacement | $4,500–$9,500 | 80% AFUE about $4,500–$6,000; 96–98% AFUE about $6,500–$9,500 |
| Central AC replacement | $5,200–$9,800 | Sized with a Manual J load calculation |
| Heat pump system | $7,500–$14,500 | Cold-climate and dual-fuel systems |
| Ductless mini-split | $4,200–$12,500 | Single-zone to multi-zone |
| Air quality equipment | $350–$2,800 | Humidifiers, filtration, HRV/ERV, UV |
| Maintenance visits | $129–$349 | Tune-ups and full-system checks |
Installed ranges cover equipment and installation labor; a replacement normally needs a city mechanical permit, so ask how it shows on your quote. Your written quote comes after we've seen the house. Full pricing
Read what homeowners across the Twin Cities say about us, in their own words, on Google.
137 towns in Minnesota and Wisconsin, one price list. Pick your area to see every town we cover.
Twin Cities HVAC service

We're a heating and cooling company and nothing else: furnaces, boilers, air conditioners, heat pumps, mini-splits and the air quality equipment that goes with them. The same flat-rate price list applies from Watertown to Hudson, and every quote is in writing before any work starts.
About usCarrier furnace error codes from the maker's own troubleshooting guides: how to count the flashes safely, what each code means, and when to call a tech.
Read the guideGoodman and Amana furnace error codes from Goodman's own service manuals: how to read the display safely, what E0, E1, E2 and others mean, and when to call.
Read the guideFind your furnace or AC's age on the data plate, then the install sticker or permit record. Serial decoder charts disagree by brand. Call 612-429-3465.
Read the guideFurnaces, boilers, air conditioners, heat pumps, ductless mini-splits, thermostats and indoor air quality equipment, as repairs and replacements, in Minneapolis, Saint Paul and about 50 miles around them. The price list is the same in every town.
The first charge is a $79 trip charge for the technician to find the fault, and it is waived if you approve the repair. A furnace tune-up is from $129 and a furnace and AC tune-up together is $219. Installed prices are on our pricing page.
Completed repairs carry a written 1-year parts-and-labor warranty. A new install carries 2 years on labor from us, plus the manufacturer's own parts coverage.
More answers on the FAQ page.
Heat out? AC quit? Call or send a request.