Maintaining a comfortable home in Arlington Heights requires a mechanical partner who understands the specific demands of Northwest Chicagoland suburban living. At Deljo Heating, Cooling & Plumbing, we’ve been has been the premier HVAC company in Arlington Heights for over a century. Whether you are looking to upgrade an aging system in a classic mid-century ranch or need precision plumbing for a new construction project, our NATE-certified team brings a legacy of honesty and technical excellence to every doorstep.
Arlington Heights HVAC: Reliable Heating & Cooling
As a full-service provider of HVAC services in Arlington Heights, we ensure your home is prepared for every shift in the Northwest suburban climate.
Heating & Furnace Services in Arlington Heights
In a village known for its family-centric neighborhoods, a broken heater is both inconvenient and a safety concern. As a leading heating company in Arlington Heights, we provide heating services that prioritize efficiency, safety, and long-term reliability during the bone-chilling Illinois winters.
Our local heating services in Arlington Heights include:
- Furnace Repair: We provide rapid diagnostics for all major brands, fixing common issues like cracked heat exchangers or faulty igniters before they lead to system failure.
- Furnace Installation: As a top furnace company in Arlington Heights, we help you transition to modern, high-efficiency models that significantly lower your monthly Nicor and ComEd bills.
- Furnace Maintenance: Our seasonal tune-ups ensure your system is clean, safe, and ready for the first polar vortex of the year.
- Boiler Repair: Many of the historic homes in Arlington Heights rely on radiant heat. We specialize in hydronic maintenance, including circulator pump replacement, expansion tank service, and radiator balancing to ensure even heat throughout your home.
- Heat Pump Installation: Experience the versatility of modern heat pumps, providing both high-efficiency heating and cooling in one unit. These are an ideal solution for homeowners looking to reduce their carbon footprint.
From a quick heating repair to a complete system replacement, we treat your family’s comfort as our own. We focus on delivering heating solutions that don’t just patch a problem, but improve your home’s overall thermal performance for years to come.
AC Services in Arlington Heights
When the humidity rises off the lake, your air conditioner becomes your home’s most important appliance. We are the AC company in Arlington Heights trusted for high-performance AC services that keep your indoor air cool and properly dehumidified.
Our cooling expertise covers:
- Air Conditioner Repair: From refrigerant recharges to capacitor replacements, we restore your cooling quickly to avoid the discomfort of a 90-degree July afternoon.
- Air Conditioner Installation: We perform precise “Manual J” load calculations to ensure your new unit is perfectly sized for your home’s specific square footage and insulation levels.
- Air Conditioner Maintenance: Preventative care is the best way to avoid the “emergency” calls that happen on the hottest days of the year when your unit is under the most strain.
- Ductless Air Conditioning Systems: These systems are perfect for older Arlington Heights homes with no existing ductwork or for supplemental cooling in sunrooms and finished third-floor attics.
- Zone Control Systems: We can install dampers and thermostats that allow you to cool different areas of your home independently, solving the “hot second floor” problem common in local split-level and two-story colonial houses.
By prioritizing airflow and mechanical precision, we help Arlington Heights homeowners enjoy a quiet and consistent indoor environment. Our goal is to provide cooling solutions that deliver maximum relief with a minimal impact on your monthly utility costs.
Plumbing Services in Arlington Heights
A reliable plumbing company in Arlington Heights must be prepared for everything from vintage pipe corrosion to modern appliance integration. Whether you need a licensed plumber in Arlington Heights for a kitchen remodel or a simple leak fix, Deljo offers a “one-call” solution for all your plumbing issues.
Our Arlington Heights plumbing experts specialize in:
- Water Heaters: We provide same-day service for traditional and tankless upgrades, ensuring your unit can handle the moderately hard Lake Michigan water common in the Arlington Heights area.
- Drain Cleaning: We clear deep clogs in kitchen and bathroom lines using professional-grade equipment that is safe for your home’s unique pipe configuration.
- Sump Pumps: Given the heavy seasonal rainfall in the Northwest suburbs, a reliable sump pump is your primary defense against a flooded basement.
- Sewer Lines: Many local homes built before the 1980s use vitreous clay pipes that are susceptible to root intrusion from Arlington Heights’ many mature trees, so we offer camera inspections to catch these issues early.
- Fixtures & Faucets: From modern kitchen upgrades to repairing leaky vintage taps, we ensure every installation is watertight and aesthetically perfect.
We take the guesswork out of plumbing by providing transparent, upfront pricing on every job we perform. Our goal is to ensure your water flows clearly and your drainage is flawless, protecting the value and structural integrity of your Arlington Heights home.
Why Arlington Heights Homes Require a Local Expert
Deljo’s familiarity with Arlington Heights’ infrastructure means allows us to provide solutions that account for the local environment. For example, many of the community’s vintage homes have ductwork that wasn’t originally designed for the high static pressure of modern, high-efficiency AC units. Therefore, performing AC services in these homes requires the expertise of a technician who knows how to calibrate airflow for older systems.
24/7 Emergency Services in Arlington Heights
We offer 24/7 emergency services in Arlington Heights for both HVAC and plumbing crises, 365 days a year. Our emergency service offerings include:
- Emergency HVAC Service: We prioritize calls during extreme weather events to restore your heat or cooling as quickly as possible.
- Emergency Plumbing: From severe sewer backups to major pipe leaks, an Arlington Heights plumber from Deljo is always just a phone call away.
Our technicians arrive in fully stocked vehicles, aiming to resolve your emergency on the first visit so you can return to your routine.
Experience the Deljo Difference in Arlington Heights
Why choose Deljo over any other service provider in the Northwest suburbs? While our track record of succes speaks for itself, specific reasons Arlington Heights residents love working with Deljo include:
- Highly-Trained Technicains: Our technicians receive specialized training in honesty, technical precision, and total property respect.
- Goldstar Maintenance Program: Enjoy priority scheduling, exclusive discounts, and biannual safety checks to keep your home running smoothly all year long.
- Total Accountability: We stand behind every installation and repair with industry-leading warranties and a dedication to your satisfaction.
Schedule service today to experience the Deljo Difference for yourself.
Schedule Your Arlington Heights HVAC or Plumbing Service Today!
Whether you need a quick repair, a routine safety check, or a quote for a high-efficiency system upgrade, the Deljo team is ready to help. Discover why Arlington Heights families have trusted us for over 100 years by calling us or scheduling service online.
Recent Jobs and Reviews in Arlington Heights, IL
Arlington Heights, IL at a glance
Deljo Heating, Cooling & Plumbing has completed 10 jobs in Arlington Heights, IL between March 2026 and October 2026.
The most recent job was on October 19, 2026.
Deljo Heating, Cooling & Plumbing has completed 10 jobs in Arlington Heights, IL in the last 12 months.
Job Locations and Reviews
Performed annual preventive maintenance on one furnace, including inspection of the blower assembly and wheel, which was found free of damage, rust, or significant debris. Conducted electrical diagnostics with a digital clamp meter at the control board and low-voltage wiring to verify system operation. Noted that the flame sensor (Reme bulb) is due for replacement and recommended further thermostat diagnostics if control issues persist.
Performed scheduled maintenance on two gas furnaces and their associated humidifiers, including a complete cleaning and inspection of each system. Verified heating operation with the thermostat in heat mode, and confirmed supply air temperature at the ductwork with a digital thermometer. Ductwork was found clean and intact with no signs of frost, rust, or cracks, and both systems were left operating properly.
Performed comprehensive maintenance inspection on CC boiler system under agreement terms. Verified operational integrity of all piping connections and components, with particular attention to pressure relief valve assembly and associated black iron piping. Conducted carbon monoxide testing using calibrated digital detector, confirming safe readings at 2 ppm, well within acceptable safety parameters. All system components found to be functioning properly with no deficiencies identified at time of inspection.
Completed cooling check on air conditioning system under maintenance agreement. Inspected blower wheel assembly, which showed normal dust accumulation consistent with operational use, and verified proper blade condition. Measured supply air temperature at 63°F, confirming adequate cooling performance and system functionality within normal operating parameters.
Completed cooling maintenance agreement service including comprehensive system inspection. Verified thermostat operation with unit set to 64°F in heating mode, confirmed proper temperature control and display functionality. Recorded supply air temperature reading of 30.1°F using calibrated digital thermometer, indicating adequate cooling performance and refrigerant charge within acceptable parameters.
Responded to service call regarding beeping sound from HVAC equipment. Accessed air handling unit in attic space and inspected control board assembly. Located source of audible alarm on electronic control board, which contained multiple toroidal inductors, capacitors, and integrated circuits. Examined all electrical connections, wiring harnesses, and mounted components for proper operation. Verified condensate drain line configuration and checked air handler access panel condition. Addressed beeping issue and confirmed system functionality upon completion of inspection.
Completed preventive maintenance agreement on two condenser units. Performed thorough inspection of electrical components including control board, capacitor, and wiring connections; verified all terminals secure and free of corrosion. Inspected condenser coils, confirmed clean condition and proper airflow. Checked indoor air return system and verified proper operation. Unit tested and operating within normal parameters.
Responded to emergency call for active water leak and sagging ceiling in basement of residential property built in 1986. Upon arrival, conducted thorough inspection of affected area to identify source of leak and assess structural damage to ceiling. Documented conditions with photographs for record purposes. Initial assessment completed to determine extent of plumbing failure and necessary repairs to resolve water intrusion and prevent further damage to property.
Completed routine HVAC maintenance agreement service on air conditioning system. Changed out 16x25x1 air filter and performed standard system inspection. Verified electrical disconnect box operation, inspected blower wheel assembly which showed clean condition with no debris accumulation, and documented equipment status with photos. All components operating within normal parameters.
Successfully completed full HVAC system replacement, installing new furnace, condenser, coil, and humidifier. Relocated A/C wall bracket to the side of the house and properly connected all components with appropriate PVC venting, ductwork, and electrical connections per manufacturer specifications.
