Northern One Hour heating and cooling service in Plymouth

AC & Furnace Repair in Plymouth, MN

Air conditioning repair, furnace repair and tune-ups in Plymouth, MN. Licensed local technicians, around-the-clock service and our On-Time Guarantee.

Schedule Online Call (763) 260-6662

Northern One Hour technician in Plymouth

16+

Years in Plymouth

Locally serving Plymouth since 2010

Northern One Hour Heating & Air Conditioning handles air conditioning repair in Plymouth, MN, along with furnace repair, tune-ups and system replacement. We are a locally owned Twin Cities company with our office in Ramsey, and our licensed technicians serve homes across Plymouth, from the lakes to the newer northwest neighborhoods.

Plymouth heating and cooling needs swing hard between seasons. Humid lake-country summers test your air conditioner, and long winters test your furnace. We know both.

When you call, you get a technician who arrives in the window you picked, explains the problem in plain language, and gives you a price before any work starts. We work on all major brands and we are available around the clock. Call (763) 260-6662 or book online.

Fully Licensed & Insured (HVAC License #MB003479)
Available for 24/7 Emergency Repairs
100% Satisfaction Guarantee

Current Tune-Up Special

$20.26 Furnace & Boiler Essential Tune-Up

$20.26 for a complete furnace or boiler tune-up in 2026. Get ready before the cold hits and don't risk a winter breakdown. Includes our No Breakdown Guarantee on qualifying equipment. Expires 10/31/2026.

See the Offer All current coupons →

Air Conditioning Repair in Plymouth, MN

Plymouth summers bring humid stretches, especially in homes close to Medicine Lake, Parkers Lake and Bass Lake. When an air conditioner falls behind on those days, you feel it first as a sticky house, then as warm air from the vents.

The usual causes are simple to name and quick for us to find: a worn capacitor or contactor, a condenser fan motor that hums but will not spin, a clogged condensate drain, or an evaporator coil that has iced over. Many Plymouth homes are two stories, so an upstairs that never cools down is often part of the story too.

We test the whole system, tell you what failed and why, and give you the price before any work starts.

Furnace Repair for Plymouth Homes

A big share of Plymouth was built in the 1970s, 1980s and 1990s, with newer neighborhoods filling in the northwest part of the city later. That means we see everything from original mid-efficiency furnaces in older ramblers to high-efficiency furnaces with PVC venting in newer two-stories.

Common winter calls include a furnace that lights and then shuts off, a pressure switch error, a noisy draft inducer motor, or a blower that runs but pushes cold air. If your furnace vents through pipes on a side wall, check them for snow and ice before you call.

Our trucks carry common parts, so most furnace repairs are done on the first visit.

Tune-Ups and Maintenance in Plymouth

The best time to tune up a furnace in Plymouth is early fall, before the first cold week. Our Essential Tune-Up covers a 19-point checklist, including safety and control tests, a carbon monoxide and heat exchanger check, gas pressure, airflow and venting.

Air conditioners do best with a spring check before the humid weather arrives. If you would rather not think about either one, our maintenance plan keeps both on the calendar for you.

When It Is Time to Replace

If your furnace or air conditioner is reaching 15 to 20 years old and the repair bills keep coming, we will lay out the numbers for repair and for replacement side by side. You make the call.

When replacement is the right move, we size the new system to your home, not to a rule of thumb, and we can walk you through financing options. Plymouth homeowners also ask us about heat pumps that pair with a gas furnace for backup, and we are happy to explain where they make sense.

Where We Work in Plymouth

Medicine Lake
Parkers Lake
Bass Lake
French Regional Park area
Plymouth Creek
Highway 55 corridor
I-494 corridor
Northwest Plymouth

Heating & Cooling Services in Plymouth

Furnace Repair

Fast diagnostics and repairs for all furnace makes and models.

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AC Installation

High-efficiency central air sized to your home.

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Heat Pumps

Year-round comfort built for Minnesota's climate.

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Indoor Air Quality

Purification, humidity control, and duct cleaning.

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Emergency Heating & Cooling

No heat or no cool? We prioritize urgent comfort calls.

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Seasonal Maintenance

Tune-ups that catch problems early and boost efficiency.

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Book Your Service in Seconds

Select your service, choose a time, and we'll be there on time - guaranteed.

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What Twin Cities Homeowners Say

4.9 / 5 Stars (4,388 Reviews)

"Mark came out to deal with a furnace emergency I was experiencing, and was extremely quick and professional."

- Matthew B., Google review

"I hada routine furnace tune up. Nick was personable, very thorough and took time to explain what he saw and provided recommendations for future use and safety. he was very professional and knowledgeable."

- Chuck F., Google review

"JACOB was very thorough and knowledgeable in flushing my tankless water heater. He did a great job!"

- kevin H., Google review

Plymouth FAQs

How fast can you get to Plymouth for an AC repair? +

It depends on the day and the season. When you call, we give you an honest arrival window, and our On-Time Guarantee means that if we are not there in the window you picked, you do not pay for the service.

My upstairs is always hotter than the main floor. Can you fix that? +

Often, yes. The fix might be airflow and duct balancing, a properly sized air conditioner, a zoning system, or a ductless unit for a problem room. We look at the whole house before we recommend anything.

Why is there ice on my air conditioner lines? +

Ice usually means low airflow or low refrigerant. Turn the AC off, set the fan to on to help it thaw, check your filter, and call us. Running a frozen system can damage the compressor.

Do you repair older furnaces in Plymouth? +

Yes. We work on all major brands, old and new. If an older furnace is safe and worth fixing, we fix it. If it is not, we will tell you why.

Do you install heat pumps in Plymouth homes? +

Yes. We install heat pumps, including cold-climate models, and often pair them with a gas furnace so the furnace takes over on the coldest nights.

Is your work guaranteed? +

Yes. Our 100% Satisfaction Guarantee covers materials, labor and craftsmanship for up to two years from the date of service.