Business Details
50+ Years
experience
Emergency
services
Trusted HVAC Services in Bethel Park, PA
DJ Yonish has been a trusted provider of heating and cooling solutions since 1969, serving residential and commercial clients in Allegheny and Washington County. With over 50 years of combined experience, our team specializes in furnace repair, air conditioning installation, and comprehensive HVAC maintenance. We prioritize customer satisfaction through personalized service, attention to detail, and a commitment to staying at the forefront of industry advancements. Our expertise spans new construction projects, equipment upgrades, and emergency repairs, ensuring year-round comfort for every client.Backed by decades of local knowledge, we offer tailored solutions for furnaces, heat pumps, air handlers, and more. Our dedication to quality is reflected in our long-standing reputation and the trust of our community. From routine tune-ups to complex system installations, we combine technical proficiency with transparent communication to deliver reliable results. As a family-owned business, we uphold values of integrity, accountability, and craftsmanship in every service call.
Services
Furnace Repair
Air Conditioning Installation
Heat Pump Services
HVAC Maintenance
Emergency Repairs
Indoor Air Quality
System Diagnostics
Equipment Replacement
Commercial HVAC
Zoning Systems
Details
- Year established: 1969
Highlights and features
- 50+ years combined experience in HVAC services
- Locally owned and operated since 1969
- 24/7 emergency repair services available
- Specialized expertise in residential and commercial systems
- Comprehensive maintenance and installation solutions
Services
Furnace Repair
Our furnace repair services address all types of heating system issues, from minor malfunctions to complete breakdowns. We diagnose problems with gas furnaces, oil furnaces, and electric heating units. Our technicians perform safety checks, component replacements, and efficiency optimizations to restore reliable operation.
Air Conditioning Installation
We offer professional air conditioning installation for residential and commercial properties. Our team handles system selection, proper sizing, and efficient installation of central AC units, mini-split systems, and heat pumps. We ensure optimal performance through proper refrigerant charging and ductwork integration.
HVAC Maintenance
Our comprehensive maintenance plans include seasonal tune-ups for heating and cooling systems. Services cover filter replacement, coil cleaning, lubrication of moving parts, and safety inspections. Regular maintenance extends equipment lifespan and maintains energy efficiency while preventing unexpected breakdowns.
Emergency Repairs
We provide urgent HVAC repair services for critical system failures. Our emergency technicians respond to heating outages, AC failures, and carbon monoxide issues outside regular business hours. Emergency service includes priority diagnostics and immediate repairs to restore comfort and safety.
Indoor Air Quality
Our indoor air quality services address ventilation, filtration, and humidity control. We install and service air purifiers, UV lights, and whole-house humidifiers. These solutions improve respiratory health by reducing allergens, bacteria, and airborne contaminants in residential and commercial environments.
People
Don Yonish
Owner
Don Yonish has led DJ Yonish since 1981, bringing over 40 years of HVAC expertise. Starting as an apprentice, he built extensive technical knowledge before taking ownership in 1993. His hands-on experience ensures quality service delivery across all operations.
Questions
What HVAC services do you offer?
We provide furnace repair, air conditioning installation, heat pump services, HVAC maintenance, emergency repairs, and indoor air quality solutions for residential and commercial clients.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency repair services for urgent heating and cooling system failures outside regular business hours.
Which areas do you service?
We serve residential and commercial properties in Allegheny County and Washington County, Pennsylvania.
How can I schedule HVAC maintenance?
Contact us via phone or our website to schedule seasonal tune-ups and preventive maintenance for your heating and cooling systems.
What brands do you work with?
We service and install Trane equipment, Weil-McLain and Buderus boilers, Mitsubishi mini-split systems, and various other HVAC brands.
