Residential & commercial

Furnace & Heating Repair in Greater Pittsburgh

A heating system failure in a southwestern Pennsylvania winter is more than an inconvenience — it can be a safety issue. Heirloom Mechanical provides fast, reliable furnace and heating repair for homes and businesses throughout Allegheny, Westmoreland, Fayette, and Washington counties.

Call 412-889-6800 Request Service

Heating Systems We Repair

Gas furnaces

All major brands of residential and commercial gas furnaces

Boilers

Hot water and steam boiler systems for residential and commercial use

Heat pumps

Air-source and ground-source heat pump systems

Electric furnaces

Electric resistance heating systems

Ductless heating

Mini-split systems in heating mode

Signs Your Heating System Needs Repair

No heat or insufficient heat: If your system runs but doesn't heat adequately, the problem could range from a dirty filter to a failing heat exchanger.

Unusual noises: Banging, rattling, or squealing from your furnace or boiler often indicates a mechanical problem.

Frequent cycling: A system that turns on and off repeatedly may have a control issue, airflow restriction, or failing component.

Yellow or orange burner flame: A gas furnace burner should burn blue. A yellow or orange flame can indicate a combustion problem that should be addressed promptly.

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

Rising heating bills: A sudden increase in heating costs often means the system is losing efficiency and may need service.

Our Repair Process

Safety check

We check for safety issues — including gas leaks and carbon monoxide risks — before beginning diagnosis.

Diagnosis

We identify the root cause of the problem and explain what we found in plain language.

Repair

We carry common parts to complete most repairs in a single visit.

Verification

We test the system after repair to confirm safe, proper operation.

Repair or Replace?

If your furnace is more than 15–20 years old, requires repeated repairs, or has a cracked heat exchanger, replacement may be the safer and more economical choice. We'll give you an honest assessment. Financing may be available for qualifying replacement projects.

Learn about financing options for qualifying replacement projects →

Frequently Asked Questions

Find HVAC Service in Your Community

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

Heating Problem? We're Available 24/7.

Call us for urgent heating repairs or use the form below to schedule service.

Call 412-889-6800

Residential HVAC AC Repair Emergency Service Boiler Repair Financing