Allegiance Heating & Cooling

About Allegiance Heating & Cooling

Allegiance Heating & Cooling is a family-owned HVAC contractor serving Mokena, Orland Park, Frankfort, Joliet, and New Lenox. The company works with homes and businesses on heating, air conditioning, indoor air quality, and ductless systems. Services described on its site include furnace and heat pump repair, heating installation and maintenance, AC repair and installation, HVAC maintenance, and emergency AC repair. Technicians assess equipment, airflow, electrical faults, refrigerant levels, ductwork, and system placement when diagnosing or installing equipment. The company says it has 25+ years of experience and more than three generations of HVAC experience. Allegiance offers financing on approved credit for replacements, a maintenance plan, and a lifetime guarantee that applies for as long as the customer owns the home.

At a glance

Trades

HVAC

In business

27 years (since 1999)

License

d (as listed by the company, not yet verified)

Service area

Mokena, Orland Park, Frankfort, Joliet, IL & The Surrounding Are y, an approve

Address

8027 189th St, Mokena, IL 60448

Highlights

Family-ownedFree estimatesEmergency serviceFinancing available

Services

• AC repair / service
• Heating repair
• Furnace service
• Heat pump service
• Ductless mini-split
• Indoor air quality
• HVAC maintenance
• HVAC installation

How the 84 score breaks down

Scores are calculated the same way for every company. See the method.

What customers say

I looked around all over for a place that would install my externally venting vent hood for me including the ductwork. These guys came through! Very kind, helpful, and cleaned up after themselves!

Google review, Sep 21, 2026

Very courteous, thorough, and fairly priced!

Google review, Sep 21, 2026

Excellent, courteous service.

Google review, Sep 17, 2026

Rating distribution and reviews from the company's public Google listing.

Other top HVAC companies near Alsip

• Precision Today Plumbing Heating Cooling Electrical (Dykstra Home Services)Score 83 · 4.8★ (1,058)
• JC Heating & Cooling, IncScore 77 · 4.9★ (441)
• King Heating, Cooling & PlumbingScore 75 · 4.8★ (945)
• Doornbos Heating & Air ConditioningScore 75 · 4.8★ (907)