(469) 556-0507

Services

Cooling, airflow, heating & controls.

Four squares. Everything your home’s comfort depends on.

Square 1 of 4

Cooling

Air conditioning repair, replacement and the upstairs bedroom that never cools off.

AC repair

When the air conditioner quits in a North Texas summer, you need someone who shows up and finds the real problem. We diagnose and repair failed capacitors and contactors, outdoor fan motors, frozen evaporator coils, clogged condensate drains and float switches, refrigerant leaks, and thermostat and wiring faults.

  • Capacitors & contactors
  • Condenser fan motors
  • Frozen coils
  • Condensate drains & float switches
  • Refrigerant leak diagnosis
  • Breaker trips & wiring
Request ac repair

AC & system replacement

When a repair stops making sense, we’ll tell you honestly and lay out the options. New systems are sized for your house, not guessed from the old unit’s label, installed to code with the permit handled, and finished with a walk-through of the new equipment so you know how it all works.

  • Central AC & heat pump systems
  • Air handlers & furnaces
  • Load-based sizing
  • Permits & code compliance
  • Old equipment haul-away
  • Final walk-through
Request ac & system replacement

Upstairs & two-story comfort

Two-story homes across Collin County fight the same battle: the upstairs bakes under a 140° attic while downstairs is fine. We look at the whole picture, including duct sizing, return air, attic duct runs, balancing and thermostat setup, before recommending anything bigger.

  • Room-to-room balancing
  • Return air improvements
  • Attic duct runs
  • Second-system service
  • Zoning options
Request upstairs & two-story comfort

Square 2 of 4

Airflow

Ducts, returns, filters and blowers: the half of comfort nobody sees.

Ductwork & airflow

Most of your ductwork is in the attic, where summer heat and a misplaced footstep take their toll. We find disconnected, crushed and leaking ducts, repair or replace runs, and fix airflow problems that make a good system feel weak.

  • Duct repair & replacement
  • Disconnected & crushed runs
  • Duct sealing
  • Return air fixes
  • Register & grille issues
Request ductwork & airflow

Filters & indoor air

Between construction dust, cedar and grass pollen, North Texas air gives filters a workout. We can recommend and install the right filter setup for your system, without choking off airflow, and keep coils and drains clean so the air stays fresh.

  • Media filter cabinets
  • Filter sizing & upgrades
  • Coil & drain cleaning
  • Musty-smell diagnosis
Request filters & indoor air

Square 3 of 4

Heating

Gas furnaces, heat pumps and auxiliary heat that’s ready for the first blue norther.

Furnace repair & replacement

Gas furnaces in this area sit idle most of the year and then have to work on the coldest mornings. We repair ignitors, flame sensors, pressure switches, inducer and blower motors and control boards, check venting and the heat exchanger, and replace furnaces when it’s time.

  • Ignitors & flame sensors
  • Pressure switches & inducers
  • Blower motors
  • Control boards
  • Venting & safety checks
  • Furnace replacement
Request furnace repair & replacement

Heat pumps

Heat pumps heat and cool from one outdoor unit, and they’re common in all-electric homes around McKinney, Princeton and Frisco. We service reversing valves, defrost controls, auxiliary heat strips and thermostat settings so you’re not running expensive emergency heat all winter.

  • Heating & cooling diagnostics
  • Defrost controls
  • Reversing valves
  • Auxiliary / emergency heat
  • Heat pump replacement
Request heat pumps

Square 4 of 4

Controls

Thermostats set up right, and tune-ups that catch problems before July does.

Thermostats

A thermostat is only as good as its setup. We install and wire smart and programmable thermostats, including heat pump and two-stage systems, and set them up so auxiliary heat, fan settings and schedules work the way you expect.

  • Smart thermostat installs
  • Heat pump & two-stage setup
  • C-wire & wiring fixes
  • Scheduling help
Request thermostats

Seasonal tune-ups

A spring tune-up before the first 100° day and a fall check before the first freeze catch weak capacitors, dirty coils, clogged drains and safety issues while they’re still cheap to fix.

  • Spring AC checkup
  • Fall heating checkup
  • Electrical & capacitor tests
  • Coil & drain cleaning
  • Safety inspection
Request seasonal tune-ups

Pricing

A clear price before any work begins.

We diagnose the problem, explain it in plain words, and give you your options and the price up front. If a repair makes more sense than a new system, we’ll tell you.

Water, burning smell or gas?

Shut it off, then call.

Turn the system off at the thermostat if water is leaking or you smell burning, and call (469) 556-0507. If you smell gas or a CO alarm sounds, leave the house and call 911 or your gas utility from outside.

4Square Heat and Air logo
469-556-0507

“We’re always in your corner!”

Heating and air conditioning for McKinney, Princeton and all of Collin County.

Lic. TACLB108423E

Call (469) 556-0507