Heating, Cooling and Boiler Service in Lincoln Square
4J’s Heating and Cooling serves homes and businesses in Lincoln Square and surrounding Chicago communities. Request help with a furnace or AC problem, plan a replacement, or discuss maintenance for your existing equipment. Share your full address and ZIP code so we can confirm coverage and appointment availability.
Choose the service you need
- Furnace repair for no heat, repeated shutdowns or uneven heating.
- AC repair for poor cooling, weak airflow, water leaks or unusual operating noises.
- Residential boiler installation and replacement when you need to compare options for radiator or hydronic heating.
- Thermostat service when temperature controls are part of the concern.
Help us prepare for your visit
Tell us the equipment brand and model if available, when the issue began, and whether it affects the whole space or individual rooms. For a replacement estimate, describe the current system and the comfort problems you want to address. We discuss findings, proposed work and pricing before you authorize repairs or an installation.
Maintenance and examples of our work
For routine care, review furnace maintenance or AC maintenance. Visit our service-area map and approved job gallery to see completed work with service descriptions and approximate ZIP areas.
Request service in Lincoln Square
Send a service inquiry, call 847-454-4049 or send a text message. Include Lincoln Square and your address in your request. English and Spanish assistance is available.
Regular business hours: Monday–Saturday, 8 AM–6 PM. Sunday closed. Call to confirm urgent or after-hours availability.
For a business walk-in cooler or freezer, see commercial refrigeration service.