Business Details
50+ Years
experience
Emergency
services
Expert HVAC Installation & Repair in Bethel Park
Established in 1969, DJ Yonish has served Bethel Park and surrounding areas for over five decades, specializing in residential and commercial HVAC solutions. Our expertise spans installation, repair, and maintenance of furnaces, air conditioners, heat pumps, and advanced air quality systems. With a legacy built on hands-on experience, we prioritize meticulous attention to detail and personalized service.Owner Don Yonish, active in the industry since 1975, leads a team committed to technical excellence and customer satisfaction. We serve Allegheny and Washington Counties, offering 24/7 emergency support and tailored solutions for new construction or system upgrades. Our dedication to quality is reflected in 44 years of continuous service and a reputation for reliability.
Services
HVAC Installation
Furnace Repair
Air Conditioning
Heat Pump Services
Air Quality Systems
Emergency Repairs
System Maintenance
Commercial HVAC
Mini-Split Systems
Carbon Monoxide Testing
Details
- Year established: 1969
Highlights and features
- 44 years of specialized HVAC experience since 1975
- Locally owned with deep community knowledge
- Full-service residential and commercial solutions
- 24/7 emergency service with rapid response
- Factory-trained technicians for all major brands
Services
HVAC Installation
We install complete heating and cooling systems for residential and commercial properties. Our technicians handle furnace, air conditioner, and heat pump installations with precision. All work meets current energy efficiency standards and manufacturer specifications.
Furnace Repair
Emergency and scheduled furnace repairs for all makes and models. Our certified technicians diagnose issues quickly and perform repairs using genuine replacement parts. We service both gas and oil-powered systems.
Air Conditioning
Comprehensive air conditioning services including installation, repair, and maintenance. We service central AC units and mini-split systems. Our team ensures optimal cooling performance and energy efficiency for residential and commercial spaces.
System Maintenance
Regular maintenance plans extend equipment lifespan and prevent breakdowns. Our tune-up services include filter replacement, coil cleaning, and safety checks. We offer customized maintenance schedules for residential and commercial clients.
Emergency Repairs
Urgent HVAC repair services available after hours and on weekends. Our emergency team responds promptly to critical heating and cooling failures. Overtime rates apply for service between 5 PM - 7 AM and on holidays.
People
Don Yonish
Owner
With 44 years in the HVAC industry since 1975, Don Yonish transitioned from apprentice to owner in 1981. He maintains hands-on involvement in operations while ensuring technical excellence and customer satisfaction across all projects.
Questions
What HVAC services do you offer?
We provide complete heating, cooling, and air quality services including installation, repair, and maintenance for residential and commercial systems.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency repair services with technicians available after hours and on weekends.
Which areas do you service?
We serve Bethel Park and surrounding areas in Allegheny and Washington Counties, covering 32 cities throughout the South Hills region.
What brands do you work with?
Our technicians service all major HVAC brands and offer installation of Trane, Mitsubishi, and Weil-McLain equipment.
How can I schedule service?
Call us directly at (412) 833-1911 during business hours or use our online service request form for after-hours scheduling.
Reviews (5)
Jason Stoyanoff
Jan 11, 2021
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They installed a new furnace for us 13 yrs ago, so we didn't necessarily expect much of a response when it stopped working in the dead of winter. We were pleasantly surprised when Lucas was at our house within a few hours! He was professional and honest and we know we can count on them again if we need to. Service: Repair HVAC
Kb
May 28, 2020
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Excellent service. I called this morning because our thermostat went haywire. With one hour Ian arrived and diagnosed then fixed the problem. Very quick response, professional service and safety precautions due to Covid 19 taken. Also reasonably priced. I highly recommend DJ Yonish.
Frank Boyd
Feb 24, 2019
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Does not return phone calls I will not recommend this company to anyone. They lost the job I wanted done
Christine S.
Nov 22, 2017
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Outstanding service. There should not be any question as to whom to go to for heating and air conditioning service! Don J Yonish Inc.(James was my technician) is thorough, incredibly professional, and very fair in price. They really deserve 10 stars!
Erin Prindle
May 17, 2013
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This is the first time we used the Yonish company and chose them based on good reviews, so wanted to leave a review of our own. The person who took my call was very friendly and courteous and gave me a timeline to expect a call from the repair person, who called to tell me when he was on his way and expected arrival time. He was friendly, explained what was wrong with our AC and tips to keep it in better running shape. We had a great experience and I will use this company again and wouldn't hesitate to recommend to others. Thank you!
