Emergency HVAC Repair in Greater Pittsburgh

Heating and cooling failures don't wait for business hours. Heirloom Mechanical provides 24/7 emergency HVAC service for homes and businesses throughout Allegheny, Westmoreland, Fayette, and Washington counties. Call us any time — day or night, weekends and holidays.

Call 412-889-6800

What Counts as an HVAC Emergency?

No heat in winter: A complete heating failure when temperatures are below freezing is a safety emergency, especially for households with young children, elderly residents, or pets.

Carbon monoxide alarm: If your CO detector activates, leave the building immediately and call for emergency service. Do not re-enter until the system has been inspected and cleared.

Gas smell: If you smell gas, leave the building, avoid using electrical switches, and call your gas utility and emergency services. Contact us once you're safely outside.

No cooling during extreme heat: Extreme heat can be dangerous for vulnerable household members. A cooling failure during a heat advisory warrants urgent attention.

Flooding from HVAC equipment: Water leaking from an air handler, condensate line, or boiler can cause significant property damage if not addressed quickly.

Electrical burning smell: A burning smell from your HVAC equipment can indicate an electrical problem. Turn off the system and call for service.

What to Expect When You Call

Immediate response

When you call our emergency line, you'll speak with someone who can help — not an answering machine.

Rapid dispatch

We dispatch a technician as quickly as possible based on your location and the nature of the emergency.

On-site diagnosis

Our technicians arrive equipped to diagnose and repair most common emergency situations in a single visit.

Clear communication

We explain what we found and what it will cost before any work begins.

Frequently Asked Questions

Residential Install — Allegheny County

When a Failing System Can't Wait: Bethel Park HVAC Replacement

Not every HVAC emergency ends with a repair. When a Bethel Park homeowner's system reached the point of no return — worn-out equipment, declining efficiency, and the threat of a mid-season breakdown — our residential team stepped in with a complete Rheem furnace and central air conditioner replacement. We removed the old equipment, fabricated new ductwork transitions, ran the refrigerant line set, and commissioned the full system in a single visit. The homeowner went from a failing setup to a properly sized, high-efficiency system ready for the Pittsburgh heating season.

Completed Rheem furnace and air handler installation in Bethel Park, PA — ductwork, refrigerant lines, and condensate drain by Heirloom Mechanical — New Rheem furnace and air handler — Bethel Park, PA

New Rheem outdoor condenser unit installed at a Bethel Park, PA residence by Heirloom Mechanical — Rheem outdoor condenser — Bethel Park, PA

Signs your system may need replacement rather than repair: equipment over 15 years old, repeated breakdowns in a single season, rising energy bills with no change in usage, uneven heating or cooling throughout the home, or a repair estimate that exceeds half the cost of a new system. When those signs appear, a planned replacement on your schedule is far better than an emergency call in January.

View the full Bethel Park project details →

Find HVAC Service in Your Community

Explore local heating, cooling, repair, replacement, and maintenance information for the communities we serve.

HVAC Emergency? Call Now.

We're available 24 hours a day, 7 days a week, including weekends and holidays.

Call 412-889-6800

AC Repair Heating Repair Residential HVAC Commercial HVAC