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HVAC Services · Air Conditioning

AC Repair, Tune-Ups & New System Installation

Fast, honest air conditioning service across Southern Utah. Same-day repair on most systems, free estimates on replacements, and tune-ups that pay for themselves in a single summer.

Schedule Service (435) 674-1275
Family-owned since 1992 Licensed & insured All makes and models Free estimates

Talk to a tech today

Same-day service available across the St. George metro area. Free estimates on installs.

Call (435) 674-1275 Request a Quote Online
  • › 24/7 emergency dispatch
  • › 30+ years of local experience
  • › Honest diagnostics

Air conditioning, done right

When the desert hits 110°, your AC is critical infrastructure.

When the desert heat hits 110°, your AC is the difference between a comfortable home and a dangerous one. M&M Mechanical Inc. has been keeping Southern Utah cool since 1992. We diagnose problems honestly. Sometimes it's a $30 capacitor, not a new compressor. And we install systems sized correctly the first time using Manual J load calculations.

Our trucks roll out of our Washington shop fully stocked with the parts that actually fail in this climate: capacitors that bake out at 115° attic temps, contactors pitted from monsoon-season power blips, blower motors clogged with red dust. About 70% of repair calls are finished in a single visit because we don't have to leave to pick up parts.

When a system has reached the end of its run, we'll show you the repair-vs-replace math on paper. New high-efficiency systems (16+ SEER2) typically cut summer electric bills by 25–40% in our climate, and current federal credits and Rocky Mountain Power rebates can take a meaningful bite out of the upfront cost. Read more about what SEER2 ratings actually mean or how to size your next AC correctly.

Schedule AC service Considering a heat pump?

Why M&M Mechanical Inc.

A different kind of HVAC company.

We don't run on commission, we don't have a call center, and we don't pretend a $30 capacitor is a $4,000 problem.

Family-owned since 1992

Three decades of repeat customers across Washington County. Same shop, same phone number.

Licensed & insured

Utah-licensed HVAC contractor. Our work passes inspection the first time, every time.

All makes & models

Carrier, Trane, Lennox, Goodman, Rheem, York, Mitsubishi. If it cools or heats, we've serviced it.

24/7 emergency

Real after-hours dispatch. When a system fails at 9pm in July, you don't want to wait until Monday.

Service area

Air Conditioning service across Southern Utah

We dispatch from Washington and serve every city in the St. George metro area. Most homes see a truck within 30 minutes of dispatch.

Washington

0 minutes. Our shop is in Washington

St. George

8–15 minutes from our Washington shop

Hurricane

20–25 minutes from our Washington shop

Ivins

20 minutes from our Washington shop

Santa Clara

15 minutes from our Washington shop

La Verkin

25 minutes from our Washington shop

Toquerville

25 minutes from our Washington shop

Springdale

45 minutes from our Washington shop

What working with us looks like

Four steps. No surprises.

From the first phone call to a working AC, here's exactly how the process goes.

  1. 01

    Call us

    Talk to a real person at our Washington shop. We'll triage and dispatch.

  2. 02

    On-site assessment

    A tech diagnoses the system, checks pressures, electrical, and airflow.

  3. 03

    Honest quote

    We explain repair vs. replace in plain language and write up the numbers.

  4. 04

    Quality work

    We finish on schedule, clean up after ourselves, and stand behind the work.

AC repair & installation FAQ

How long does most AC repair take?
Most residential AC repairs are wrapped up in a single 1–2 hour visit. The common failures, like capacitors, contactors, low refrigerant from a small leak, and blower motors, are parts we keep stocked on the trucks. Compressor or coil replacements take longer, but we'll tell you up front before any work starts.
How much does a new AC system cost in St. George?
For a typical Southern Utah home, a complete AC replacement (condenser, coil, line set, and labor) ranges from roughly $6,500 to $12,000+ depending on size, SEER2 rating, and whether ductwork or electrical needs work. We do free in-home estimates and walk you through the math on each tier. No pressure, no commission salespeople.
When should I replace my AC instead of repairing it?
The honest rule of thumb: if the system is past 12–15 years old and the repair cost is more than 30–40% of replacement, replacement usually wins on a 5-year horizon. Compressor and evaporator coil failures on older R-22 equipment almost always tip toward replacement, since the refrigerant alone has gotten brutally expensive.
What size AC do I need for my home?
Square footage alone is a bad proxy. Proper sizing uses a Manual J load calculation that accounts for insulation, window orientation, ceiling height, duct leakage, and our specific desert climate. Oversized AC short-cycles, never pulls humidity, and wears out compressors. We do the calc on every install, so there's no guessing.
Do you service mini-splits and ductless systems?
Yes. We install and service Mitsubishi, Daikin, LG, Fujitsu, and other major mini-split brands. Ductless is often the right call for additions, casitas, garages, and homes where running ductwork would be invasive or expensive.
Do you offer same-day AC repair?
On most calls, yes, especially for repeat customers and during the summer rush when we run extended hours. Call as early in the day as possible. If we can't get there same-day, we'll tell you immediately rather than stringing you along.

AC out? We can probably be there today.

Same-day repair available across Southern Utah. Call the shop directly.

(435) 674-1275 Schedule Online