PREMIER COMFORTHEATING & COOLING LLC844-467-4822

THE CHANGEOVER.

One house.
Two seasons.

From the first cold night to the first hot afternoon, we keep Lake & McHenry County homes ready for both.

Call 844-467-4822 Or book a service visit
Family owned and operated
Fox Lake, Illinois
Serving Lake & McHenry County
4.9★★★★★377 Google reviewsVerified October 31, 2026
Try the thermostat.
Illustrative scenarios
OUTSIDE14°F
One house, one duct system, two seasonsIllustrative cross section of a two-storey house with a furnace, A-coil, floor and ceiling registers, return duct and outdoor condenser. Orange marks heating airflow and blue marks cooling airflow. UPSTAIRSDOWNSTAIRSMECHANICALCLOSETCEILING REGISTERFLOOR REGISTERRETURNGRILLEOUTDOOR CONDENSERA-COILFURNACESUPPLY TRUNK REFRIGERANT LINESILLUSTRATIVE SYSTEM SECTION
SET TO72°
TURN THE DIAL
OR TAP + / −
50° TO 80°
INSIDE 68°F

Heat call. Burner lit.

Illustration only. No live weather or system data.
Furnace repair ↗Furnace tune-up ↗
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC

Same house. Same ductwork. Different season, different job.Change the month. Try a different setpoint.

What a tune-up
actually is.

Spring is for the A/C. Fall is for the furnace. Twice a year, we look inside the system you're about to count on.

  1. 01Inspect and clean heat exchanger
  2. 02Check and tighten all electrical connections
  3. 03Lubricate all moving parts
  4. 04Test thermostat calibration and operation
  5. 05Inspect and clean burners and ignition system
  6. 06Check refrigerant levels and inspect for leaks
  7. 07Clean or replace air filter
  8. 08Inspect and clean evaporator and condenser coils
  9. 09Test safety controls and limit switches
  10. 10Check flue and venting for obstructions
  11. 11Measure airflow and static pressure
  12. 12Provide written summary of findings

The maintenance checklist. Tasks depend on the equipment being serviced. If we find a problem, we explain it and quote any additional work first.

Inside the heating side of the system.AI-generated illustrative machinery. Not a Premier Comfort job.

Which side
needs a hand?

A furnace that won't light and an A/C that won't cool need different work. They get the same straight answer.

Heat

FURNACES / HEAT PUMPS / DUCTWORK

Furnace Repair

Fast diagnosis and repair of gas and electric furnaces. We stock common parts so most repairs are completed same-day.

Furnace Tune-Up

Annual maintenance to keep your furnace running safely and efficiently all winter. Includes full inspection, cleaning, and safety check.

Furnace Installation

New furnace installation with proper sizing, professional setup, and full system testing. We help you choose the right unit for your home and budget.

Heat Pump Service

Repair, maintenance, and installation of heat pump systems for year-round comfort and energy efficiency.

Thermostat Service

Thermostat replacement, smart thermostat installation, and calibration to keep temperature control accurate.

Ductwork Inspection

Leaky or blocked ducts reduce heating efficiency and comfort. We inspect and seal ductwork to maximize system performance.

8 signs your heating needs attention

  • Furnace is blowing cold or lukewarm air
  • Unusual noises, banging, rattling, or squealing
  • System short-cycles (turns on and off frequently)
  • Noticeably higher heating bills without explanation
  • Uneven temperatures from room to room
  • Furnace is more than 15 years old
  • Yellow or flickering pilot light (should be blue)
  • Excess dust or dry air throughout the home
All heating services

Cool

CENTRAL A/C / DUCTLESS / AIR QUALITY

AC Repair

Fast, accurate diagnosis and repair of central air conditioning systems. Most repairs completed same-day with parts on the truck.

AC Tune-Up

Pre-season maintenance to maximize efficiency, prevent breakdowns, and extend the life of your cooling system.

AC Installation

New air conditioner installation with proper load calculation, professional setup, and full system commissioning.

Ductless Mini-Split

Installation and service of ductless mini-split systems, ideal for room additions, older homes, or areas without existing ductwork.

Refrigerant Service

Refrigerant leak detection, repair, and recharge to restore proper cooling capacity and protect your compressor.

Indoor Air Quality

Whole-home dehumidifiers, air purifiers, and UV systems to improve comfort and air quality alongside your cooling system.

8 signs your A/C needs service

  • AC is blowing warm or barely cool air
  • System runs constantly but can't reach set temperature
  • Unusual noises, grinding, squealing, or banging
  • Ice forming on the refrigerant lines or coils
  • Water leaking around the indoor unit
  • Noticeably higher electric bills in summer
  • Uneven cooling, some rooms much warmer than others
  • System is more than 12-15 years old
All cooling services

The outdoor unit waits through winter.
Spring is the time to get it ready.

Illustrative outdoor air conditioner on a concrete pad beside a house, with frost on the grass at dusk
AI-generated seasonal study. Illustrative, not a Premier Comfort installation.

The straight
answer.

Repair it or replace it? Start with the condition of your system and the cost of the fix. These are the guidelines we use.

50% / 15

When a furnace replacement makes sense.

If the repair costs more than half a new system and the furnace is over 15 years old, replacement is usually the smarter investment.

<10 years

A younger A/C may be worth fixing.

If the system is under 10 years old and the repair is straightforward, fixing it usually makes sense.

Manual J

Size the system for the house.

A load calculation accounts for square footage, insulation, windows and layout. Too big or too small can cost more to run and wear out faster.

“There's never any pressure, you decide how to proceed.”

The name
that comes up?
Keith.

Owner Keith Kalina is also the technician customers keep naming. Sonny and Jason get a mention, too.

4.9 / 377
Google reviews
Verified October 31, 2026
4.7 / 74
Yelp reviews
As published on Premier Comfort's site
We just had our furnace, AC, and hot water heater removed and new equipment installed by 2 amazing techs: Sonny & Jason! We are truly thankful for the great service and Keith has been fantastic!
Cynthia KingGOOGLE · SEPT 22, 2026
They were out to the house in 24 hours for just a routine service. They were super courteous and thorough, plus they made suggestions for better care of our systems that didn't cost a dime.
Steve PhelanGOOGLE · JULY 21, 2026
After being 'taken advantage of' in the past, Keith was punctual, knowledgeable, and, most importantly, honest. No pressure, no unnecessary recommendations, just quality work and clear communication.
Robin CzuczorGOOGLE · JUNE 22, 2026
Technician Keith did a same-day repair and we had heat again. Unfortunately needed another service call and yet again Keith showed up after hours and took care of us.
Kelli KochGOOGLE · NOV 11, 2025
Read more customer reviews

A little help
with the bill.

Mention the code when you call. We'll explain the work before we start it.

$95

Furnace or A/C tune-up

Call to schedule.

$50 OFF

Any repair service

New customers only. Expires December 31, 2026.

FREE

Humidifier or smart thermostat

With any new installation. Expires December 31, 2026.

FREE

A second opinion

On a quote you already have. No expiration.

Room in the monthly budget.

FTL Finance offers financing for new installations and major repairs.

Subject to credit approval.
About FTL Finance

Around here,
both seasons count.

Based on US 12 in Fox Lake. Serving homes across Lake & McHenry County.

Brands we service.

AprilaireLENNOXAmerican StandardCarrierHoneywellMITSUBISHI ELECTRIC