Heating & Cooling First
HVAC Service & Repair in Allentown
PJ MAC HVAC Service & Repair is a full-service HVAC contractor โ 24-hour AC and heating repair, installation and maintenance come first, backed by NADCA-standard air duct and dryer vent cleaning.



When a system starts acting up, it usually tells you before it quits โ a strange smell, a rattle, rooms that won't hold temperature. PJ MAC HVAC Service & Repair offers 24-hour AC and heating repair throughout Breinigsville, PA, dispatched from our Allentown office. If your equipment is sending warning signs, call (610) 672-3042 and have a technician read them before a minor fault turns into a no-cool or no-heat night.
Reading the Signs Your AC Is Failing
Cooling problems rarely arrive without warning. Air that blows warm, a unit that short-cycles on and off, water pooling near the indoor coil, or a sudden spike in how hard the system works are all symptoms our Breinigsville customers describe before they call. Behind them sit the usual culprits: low refrigerant from a slow leak, a failed capacitor, a struggling compressor, or a coil that has frozen over because airflow dropped. We diagnose the actual cause rather than guessing, and we service every major brand, including Lennox, Carrier, Trane, and Goodman.
When the Heat Quits in Breinigsville
Heating faults announce themselves too โ short bursts of warm air, a furnace that ignites and shuts down, banging from a boiler, or a heat pump that runs constantly without keeping up. PJ MAC repairs gas and oil furnaces, boilers, and heat pumps across Breinigsville. Because a cracked heat exchanger can leak carbon monoxide, our technicians inspect for it on every gas furnace call; if we find a problem, we tell you plainly and shut the unit down rather than patch around a safety risk.
Repair, Replace, or Install New in Breinigsville
Some symptoms point to a quick fix; others mean the equipment is at the end of its life. We walk Breinigsville homeowners through that decision honestly, and when replacement makes sense we provide free installation estimates and size the new system to the home instead of selling you the biggest box. New equipment carries manufacturer warranties, and our technicians are EPA 608 certified for proper refrigerant handling.
Serving Breinigsville and the Lehigh County Area
- โAllentown, where our service office is based
- โFullerton and Northampton to the north
- โMacungie and Coopersburg to the south
- โQuakertown along the Bucks County edge
- โSurrounding Lehigh County communities
PJ MAC HVAC is family owned and operated with 32+ years of experience, owner Doug is a Master HVAC Technician, and we hold PA License #PA157168 and a 5.0-star rating from 176 Google reviews. If your Breinigsville home is showing any of the warning signs above, don't wait for a full breakdown โ call (610) 672-3042 day or night to schedule repair.
Areas We Serve from Allentown
- Allentown, PA
- Breinigsville, PA
- Fullerton, PA
- Coopersburg, PA
- Quakertown, PA
- Northampton, PA
- Macungie, PA
- Schnecksville, PA
- Westwood Heights, PA
- Emmaus, PA
- Cherryville, PA
- Trexelrton, PA
- Zionsville, PA
- East Greenville, PA
- Germansville, PA
Served by our local office: Allentown AC Repair
