How Old Is My Furnace or AC? Find the Date on the Data Plate
Find 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.
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Central Minnesota Heating and Cooling repairs and replaces furnaces, ACs, heat pumps and boilers in Cologne (Carver County), about 29 miles from downtown Minneapolis.
Cologne is a Carver County town named for Cologne, Germany, and a 1939 home movie of its German-American community is preserved in the National Film Registry.
Updated October 21, 2026 · By Eric Brown, owner, Central Minnesota Heating and Cooling

Around town: U.S. Highway 212 · Highway 284 · Fritz Field · Cologne Academy
Book in CologneFor most of the 20th century Cologne barely changed size, from about 460 residents in 1950 to 563 in 1990, and the houses from that long stretch sit on the original village grid near downtown. They are a mix of early-1900s frame homes and postwar ramblers, and this small core is where you still find chimney-vented furnaces, water heaters sharing a flue, and central air that went in decades after the house was built.
Then the town more than tripled between 1990 and 2020. Most Cologne homes today are 2000s and 2010s two-stories, split-entries and ramblers on the newer streets, with direct-vent 90%+ furnaces and basements that were often finished years after move-in. The early-2000s wave is reaching the age where original furnaces and condensers get replaced. Homes from the 2010s are mostly in the repair-and-maintain stage, and whether their longer parts warranties still apply often depends on whether anyone registered the equipment after closing.
Cologne's newer streets border open farmland, and young subdivisions have few mature trees to break the wind. Snow drifts along side yards and against low PVC terminations, and a buried intake shuts a high-efficiency furnace down. The other winter complaint in tight newer homes is sweaty windows. That usually means indoor humidity is too high for the outdoor temperature, from a humidifier set too high, an air exchanger that isn't running, or both. Turn the humidifier down as it gets colder, and have the air exchanger cleaned and balanced.
On Cologne's newer lots the trees are still small, so the west wall of the house and the condenser beside it take full afternoon sun. Upstairs bedrooms in the two-stories heat up first, and a builder condenser sized by rule of thumb either struggles or short-cycles; a load calculation settles which. In the original village, many older houses still rely on window units or on central air bolted onto a furnace whose ducts were sized for heat, and those systems gain the most from a return upgrade before anyone adds tonnage.
CenterPoint pays heating rebates on qualifying high-efficiency furnaces and boilers, and it also rebates programmable, Wi-Fi and smart thermostats. On the Xcel side, ask about heat pump and cooling rebates, and whether the one you want needs a registered contractor. Xcel's AC Rewards program pays an annual reward for letting a connected smart thermostat ease back your AC on peak afternoons, and Saver's Switch trades AC cycling for bill savings.
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, owned by Eric Brown and in business since 2009, serves Cologne and nearby towns in Carver County, about 29 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 Cologne 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.
On a newer house the cause is usually setup, not age. We check refrigerant charge by superheat and subcooling, measure static pressure, look at the filter and indoor coil, and confirm the thermostat is staging a two-stage system correctly. Builder installs sometimes skip that final setup, and correcting it often restores the capacity you thought was missing.
Yes, mostly because it keeps small problems small: a dirty flame sensor, a slow condensate drain, a weakening capacitor. Some manufacturers also ask for proof of regular maintenance when you file a warranty claim, so keep the receipts. A furnace or AC tune-up starts at $129, a combined furnace and AC tune-up is $219, and you can ask us about a maintenance plan.
Most basement finishes add walls and ceilings but no new supply or return, so the space gets whatever leaks from the trunk. With no return, supply air can't circulate either. We add supply runs sized to the rooms, a return low on the wall, and a damper so you can balance the basement against the upstairs by season. Doing it before the drywall goes up costs far less than afterward.
Check the venting first. Many older Cologne homes vent the furnace and water heater into one chimney. If the new furnace is a 90%+ model on PVC, the water heater is left alone in that flue and may need a liner or its own vent. Older ducts can also be too small for a modern blower. We look at both, and the written quote covers them, so nothing gets added on install day.
Find 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 guideDaikin vs Mitsubishi mini-splits for each room of a Minnesota home: bedrooms, living areas, porches and kneewall attics. Installs run $4,200–$12,500.
Read the guideWater by the furnace in July usually means a clogged AC condensate drain. Learn how to clear it, whether the pump is to blame, and when to call 612-429-3465.
Read the guideBrands we service in Cologne: Carrier · Trane · Lennox · Goodman · Rheem · Mitsubishi Electric · Daikin · American Standard · Navien · Weil-McLain · and every other major brand
Heat out in Cologne? Call or send a request.