AC Replacement & Installation in Longmont, CO
A new air conditioner is a big decision. We help you make it with honest numbers, correct sizing and a One Year Test Drive that takes the risk off your shoulders.
Replace Your Air Conditioner With Confidence in Longmont
Nobody wakes up excited to buy a new air conditioner. Most Longmont homeowners get here one of two ways: a system that has been limping along for years finally fails, or a repair estimate comes in high enough that replacing starts to make sense. Either way, you want straight answers, not a sales pitch.
That is how M&M Heating, Cooling, Plumbing & Electrical has approached AC installation and replacement since 1996. We start by looking at your current system, your home and how you use it. If a repair is the smarter money, we will tell you. If replacement is the better long-term call, we size the new system properly with a load calculation rather than copying the number off the old unit, because many homes along the Front Range were fitted with oversized equipment that short cycles and never dehumidifies well.
From there, we walk you through efficiency options. Today’s systems are rated by SEER2, and a higher rating generally means lower cooling bills, especially when the system is matched to your ductwork and installed correctly. We will also price a heat pump if it fits your home, since it cools exactly like an AC and heats in the shoulder seasons.
Financing is available on new equipment, and every installation is backed by our One Year Test Drive: if you are not 100% happy within the first year, we make it right, up to removing the equipment and refunding your money. Already have a quote? Bring it to us for a free second opinion.
Signs Your Air Conditioner Is Ready for Replacement
One of these alone is not a verdict. Two or three together usually are.
It Is Past Its Expected Life
Most central air conditioners last roughly 12 to 15 years, longer with good maintenance. Once a system passes that range, parts get harder to find and each repair buys less time.
Repair Costs Keep Climbing
A common rule of thumb: if a repair costs a large fraction of a new system's price and the unit is more than 10 years old, replacement is usually the better value. We will show you both numbers.
Cooling Bills Are Rising
Older systems lose efficiency as compressors wear and coils corrode. If your summer electric bills climb year over year with the same usage, the equipment is the likely cause.
It Uses a Phased-Out Refrigerant
Systems that run on R-22 can no longer be recharged affordably, and the industry is now moving past R-410A as well. A refrigerant leak on an older system often tips the decision toward replacement.
Uneven Cooling and Short Cycling
Rooms that never cool, a system that starts and stops constantly, or sticky indoor air often point to equipment that was never sized right for the home. Replacement is the chance to fix that for good.
How We Help You Decide
There is no single right answer. Here is how the two paths usually compare.
Repair
The right call when the system is younger, well maintained and the failure is a single component.
- Lower upfront cost today
- Best for systems under about 10 years old
- Makes sense for capacitors, contactors, motors and similar parts
- Does not improve efficiency or fix sizing problems
- Risk of another failure on an aging system
Replace
The smarter investment when the system is old, inefficient, leaking refrigerant or costing you every summer.
- Modern SEER2-rated efficiency lowers cooling costs
- Properly sized for your home with a load calculation
- New manufacturer warranty and quieter operation
- Financing available on new equipment
- Backed by the One Year Test Drive
The M&M Difference
Why Longmont homeowners trust us with one of the biggest purchases in the house.
The One Year Test Drive
If you are not 100% happy with your new equipment for any reason within the first year, we make it right, up to exchanging it or removing it and refunding your money in full. Conditions may apply.
Sized Right, Installed Right
We run a load calculation on every replacement and match the system to your ductwork. Correct sizing and careful installation matter as much as the brand on the box.
Financing and Honest Pricing
Financing is available on new equipment, and your estimate is upfront and itemized. Ask us about any utility rebates that may apply to high-efficiency systems.
NATE-Certified Installers
Our licensed and insured technicians install, commission and test every system to manufacturer specifications, then show you how to run it.
Our 4-Step Process
From the first conversation to a cool home, here is how a replacement works.
In-Home Assessment
We inspect your current system, measure the home, check ductwork and insulation, and talk through comfort problems you want solved.
Options and Upfront Pricing
You get clear choices at different efficiency levels and price points, including heat pump options where they make sense, with financing details if you want them.
Professional Installation
Our NATE-certified team removes the old equipment, installs the new system to spec, verifies refrigerant charge and airflow, and leaves the space clean.
Walkthrough and Follow-Up
We show you how to operate the thermostat and system, register your warranty, and stay available for the full year of your Test Drive and beyond.
AC Replacement Questions from Longmont Homeowners
How do I know whether to repair or replace my air conditioner?
Look at three things: the age of the system, the cost of the repair relative to a new unit, and how it has performed over the last few summers. A young system with a single failed part is worth repairing. An older system with a compressor failure, a refrigerant leak or a history of repairs is usually worth replacing. We give you both numbers and let you choose, and we offer a free second opinion if you already have a quote.
What does SEER2 mean and how high should I go?
SEER2 is the current efficiency rating for air conditioners, measured under updated test conditions that better reflect real ductwork. A higher number means less electricity for the same cooling. The right level depends on your budget, how long you plan to stay in the home and how much you run the AC. We will show you the operating cost difference between options so the choice is based on your numbers, not ours.
Why does sizing matter so much?
An oversized air conditioner cools the air quickly, shuts off, and never runs long enough to pull humidity out or even out temperatures from room to room. An undersized one runs constantly and still falls behind on the hottest days. A load calculation accounts for your home's square footage, insulation, windows, orientation and the Longmont climate so the system is matched to the actual job.
Should I consider a heat pump instead of a standard AC?
It is worth pricing. A heat pump cools identically to a central air conditioner, and modern cold-climate models can handle much of a Front Range winter, often paired with your existing furnace as a dual-fuel system. If you are replacing the AC anyway, the added cost for heating capability is often modest. Ask about utility rebates that may apply.
Do you offer financing on a new air conditioner?
Yes. Financing is available on new equipment installations, and we will walk you through the options alongside your estimate so you can compare monthly cost against the energy savings of a more efficient system. There is no pressure to use it, and your pricing is the same either way.
How does the One Year Test Drive work?
It applies to new equipment installations. Within the first year, if you are not 100% happy with your purchase for any reason, we will do what it takes to make it right, from exchanging the equipment for something different to removing it and refunding your money in full. Conditions may apply, and we are happy to explain the details before you sign anything.
Get an Honest Estimate on a New Air Conditioner.
Open 24/7 | Emergency Service Available
Call (720) 608-3973AC Replacement Across the Front Range
Proudly serving Longmont, CO and surrounding communities including 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
