Air Conditioning & Cooling Services in Longmont, CO
From emergency AC repair to high-efficiency replacements, ductless mini-splits and whole house fans, M&M keeps Front Range homes comfortable all summer.
Every Way to Stay Cool in Longmont, All Under One Roof
Summer along the Front Range is short but intense. The sun hits harder at nearly 5,000 feet, afternoons get hot, and the dry air makes a struggling air conditioner feel even worse. Whether your system quit on the warmest day of the year or you are planning ahead for a replacement, M&M Heating, Cooling, Plumbing & Electrical has handled cooling for Longmont homeowners since 1996.
Our NATE-certified technicians repair and maintain all makes and models of central air conditioners, install properly sized high-efficiency replacements, and set up ductless mini-splits for additions, garages and older homes without ductwork. For homeowners who want to take advantage of cool, dry Colorado evenings, we also install QuietCool whole house fans that let the AC rest.
If you are weighing a system that heats and cools in one, ask us about heat pumps. Modern cold-climate models handle Front Range winters and work just like a central AC in summer.
Every visit comes with upfront pricing, no extra charge for nights or weekends, and a 100% satisfaction guarantee. Use the links below to find the service you need, or reach out and we will point you in the right direction.
Cooling Solutions for Every Home and Budget
Choose the service that fits your situation. Not sure where to start? Call and we will help you sort it out.
AC Repair
Warm air, odd noises, water around the unit or a system that will not start. 24/7 diagnosis and repair on all makes and models.
Learn MoreAC Maintenance
A spring 23-point precision tune-up and cleaning that keeps your AC efficient, reliable and under warranty. Included for Loyalty Club members.
Learn MoreAC Replacement
Repair-vs-replace guidance, proper sizing, high-efficiency installation, financing and the One Year Test Drive on every new system.
Learn MoreDuctless Mini-Splits
Year-round heating and cooling for additions, garages, basements and older homes without ductwork. Installed, repaired and maintained by M&M.
Learn MoreWhole House Fans
QuietCool whole house fans that flush hot air out and pull cool, dry evening air in. A low-cost way to run the AC less along the Front Range.
Learn MoreCommon Cooling Problems in Longmont Homes
A few of the situations that bring homeowners to us every summer.
AC Running but Not Cooling
Warm air from the vents, long run times or rooms that never catch up usually point to a refrigerant, airflow or compressor problem. Our repair team finds the cause and fixes it right.
It Has Been a While Since the Last Tune-Up
Dust, cottonwood fluff and hard-water scale on the outdoor coil quietly drag down efficiency. A spring tune-up catches small problems before they become July breakdowns.
An Aging System That Keeps Breaking
If your air conditioner is well past its expected life and repair bills are stacking up, a properly sized high-efficiency replacement often costs less over time than keeping it alive.
Rooms Without Ductwork
Finished basements, additions, garages and older Longmont homes without ducts stay comfortable with a ductless mini-split that heats and cools a single zone.
Cool Evenings Going to Waste
Front Range nights cool off dramatically after sunset. A whole house fan pulls that cool, dry air through the home and pushes hot air out of the attic so the AC can take a break.
The M&M Difference
Nearly 30 years of keeping Longmont and the Front Range comfortable.
Family-Owned Since 1996
M&M is based right here at 110 S Bowen Circle in Longmont. We have built our name one neighbor at a time, and we plan to keep it that way.
NATE-Certified Technicians
Our licensed and insured techs train on every type of cooling system, from central AC to ductless mini-splits and heat pumps, across all major makes and models.
24/7 With No Overtime Charge
Air conditioners fail on the hottest days and the busiest weekends. We answer around the clock and never add a surcharge for nights or weekends.
Guarantees That Mean Something
Upfront pricing before any work starts, a 100% satisfaction guarantee on our service, and the One Year Test Drive on new equipment installations.
Our 4-Step Process
Simple, transparent and built around your schedule.
Tell Us What Is Going On
Call or book online any time. We will ask a few questions, help you decide whether this is a repair, tune-up or replacement conversation, and schedule a visit that fits your day.
Honest Diagnosis
A NATE-certified technician inspects the system, explains what they found in plain language and lays out your options with upfront pricing.
Work Done Right
Once you approve, we complete the repair, tune-up or installation with care for your home, then test the system to confirm it performs as promised.
Ongoing Support
We walk you through the results and recommend next steps, including Loyalty Club membership to keep your cooling system maintained automatically each spring.
Cooling Questions from Longmont Homeowners
Which cooling service do I need?
If your air conditioner is running poorly or not at all, start with AC repair. If it works fine and you want to keep it that way, schedule an AC tune-up. If the system is old, unreliable or costing more to fix than it is worth, our AC replacement page walks through that decision. Rooms without ducts are a job for a ductless mini-split, and a whole house fan is a smart add-on for anyone who wants to run the AC less.
Do I really need air conditioning in Longmont?
Plenty of older Longmont homes were built without it, but summers are warm enough that most homeowners now want some form of cooling. A whole house fan can be enough for homes that cool off well at night, while central AC, a heat pump or a ductless system handles the hottest stretches. We will help you weigh the options honestly, without pushing more equipment than you need.
Can a heat pump replace my air conditioner?
Yes. A heat pump cools exactly like a central air conditioner in summer, then reverses to heat your home in winter. Modern cold-climate models are designed for Front Range winters and are often paired with an existing furnace as a dual-fuel setup. If you are already replacing your AC, it is worth pricing a heat pump at the same time.
What is the One Year Test Drive?
It is our promise on new equipment installations. If you are not 100% happy with your new system for any reason within the first year, we will make it right, up to exchanging the equipment or removing it and refunding your money in full. Conditions may apply, and we are glad to explain them before you buy.
Do you charge extra for emergency or weekend service?
No. M&M is open 24 hours a day, 7 days a week, and we do not add a surcharge for nights, weekends or holidays. You will get upfront pricing before any work begins, no matter when you call or what day it is.
Do you service commercial cooling systems?
We do. In addition to residential work, our technicians repair, maintain and replace cooling equipment for businesses across Longmont and the Front Range. Ask about a maintenance plan to keep your space comfortable for customers and staff through the summer.
Ready to Cool Down? We Are Ready to Help.
Open 24/7 | Emergency Service Available
Call (720) 608-3973Cooling Services Across the Front Range
Proudly serving Longmont, Erie, Frederick, Firestone, Dacono, Mead, Johnstown, Berthoud, Niwot, Gunbarrel, Lafayette, Louisville and Superior.
Primary Service Area
- Longmont, CO
- Erie, CO
- Frederick, CO
- Firestone, CO
- Dacono, CO
Extended Area
- Mead, CO
- Johnstown, CO
- Berthoud, CO
- Niwot, CO
- Gunbarrel, CO
Also Serving
- Lafayette, CO
- Louisville, CO
- Superior, CO
