Lennox HVAC in North Hills, CA | Stonegate Heating & Air California
Independent Lennox service in North Hills — just minutes from Lennox in Northridge — typically runs $150–$650 for repairs and $3,500–$7,500 for full system replacement, with most calls completed same day. What makes our Lennox work different here is the concentration of 1996–1998 post-earthquake systems now failing simultaneously in 150°F attics, and our field experience knowing which ones merit repair versus honest replacement. Call (855) 467-1888 for a free estimate.
We service every Lennox line from Merit to Signature Series across the 91343 and 91393 ZIP codes. As an independent company, we choose parts based on what your system actually needs, not a manufacturer playbook.
Why North Hills Residents Choose Us for Lennox Service
North Hills homeowners have a specific problem: thousands of Lennox systems installed during the mid-1990s rebuild wave are now hitting their failure window all at once. Jason Trent, our owner and field supervisor, grew up in the San Fernando Valley and also handles Lennox in San Fernando and spent enough summers without reliable AC to know exactly what that feels like. He took HVAC coursework at Los Angeles Trade-Technical College before building Stonegate into a 16-year operation with nearly 500 verified reviews at a 4.7-star average.
That background matters when we’re diagnosing a 1996 Lennox Merit in a ranch home off Nordhoff Street versus a newer Signature Series in a post-quake rebuild. We carry OEM Lennox parts for warranty work and critical components, plus quality aftermarket options for capacitors and contactors where equivalent. Jason still supervises jobs personally, and our technicians are fluent across nine brands, so we’re never the contractor who “doesn’t service that model.”
From a single-room mini split to a full commercial system, we handle it. Emergency HVAC available.
Common Lennox HVAC Problems We Solve in North Hills
- Capacitor and control board failures on Merit Series units. The 13ACD and 14ACX models installed after 1994 weren’t designed for North Hills attics that exceed 150°F by mid-afternoon. We regularly find original run capacitors that have drifted 20–30% below spec, causing hard starts and premature compressor damage.
- Compressor valve failures on Signature Series two-speed units. The SL28XCV and EL16XC1 use sophisticated staging that stresses compressor valves during North Hills’s extreme daily temperature swings, sometimes 40°F or more between morning lows and afternoon peaks.
- Heat exchanger cracking on 1990s post-quake furnaces. Lennox units installed in 1995–1997 are now 28–30 years old, squarely in the failure window for heat exchanger metal fatigue. We inspect with cameras and combustion analyzers; no guesswork on a safety-critical component.
- Corroded evaporator coils from decades of deferred maintenance. Homeowners who assumed their “new” 1996 system was fine often skipped annual service entirely. The original coils in these North Hills attics show pitting and refrigerant leaks that could’ve been prevented with basic coil cleaning and charge checks.
- Cracked flex duct joints and collapsed insulation. Thirty summers of 150°F attic heat turns flex duct into brittle, leaky pathways. We seal with mastic, not tape, because tape fails in this environment within a single season.
Lennox Service in North Hills: What Local Conditions Mean for Your Equipment
North Hills sits at the epicenter of the 1994 Northridge earthquake’s damage zone, and a large share of its housing stock had HVAC systems hastily replaced during the mid-1990s rebuild wave. Those systems are now approaching 28–30 years old, precisely the failure window for compressors, heat exchangers, and duct connections, creating a concentrated replacement surge unlike neighboring Valley cities — though we also provide Valley Glen Lennox service — that weren’t hit as hard by the quake.
For Lennox owners specifically, this means a 1996 Merit 13ACD or Elite XC16 isn’t just “old” — it’s a time-capsule unit that predates modern refrigerant standards and has likely never had its charge verified. The system will tell you what’s wrong — you just have to know how to listen. In North Hills, that usually starts with a capacitor that’s finally given up after 30 years of thermal cycling, or flex duct joints that have turned to powder in attics where the air temperature exceeds most saunas. We factor this into every recommendation: repair what’s worth repairing, replace honestly when the math doesn’t work, and never upsell a homeowner into a system they don’t need.
Lennox Models & Products We Service in North Hills
We work on the full Lennox sales & service lineup, including Merit Series (13ACD, 14ACX), Elite Series (XC16, XC20), and Signature Series (SL28XCV, EL16XC1). Our vans carry common OEM Lennox capacitors, contactors, and control boards for same-day repair on most North Hills calls.
For warranty-covered work, we use factory-specified Lennox parts exclusively. For out-of-warranty repairs, we’ll quote both OEM and quality aftermarket options for non-critical components, with the price difference upfront. Heat pump repair and ductless system service are stocked separately — North Hills’s 1950s ranch stock increasingly needs Heat Pump & Mini Split in North Hills solutions where original duct systems are too compromised to salvage.
Lennox Service Pricing in North Hills
| Service | Price Range |
|---|---|
| AC Repair | $150–$650 |
| Furnace Repair | $150–$700 |
| AC Installation | $3,500–$7,500 |
| Tune-Up | $80–$200 |
What drives cost? Access to the unit, whether we’re matching existing refrigerant or converting to R-410A, and whether the duct system needs sealing or replacement alongside the equipment. A free estimate from Stonegate includes full diagnostic time, written options, and no obligation to proceed. Call (855) 467-1888 to schedule — estimates are free, and we’ll give you the exact number before any work starts.
Serving North Hills, CA — Our Local Coverage Area
We’re based in the North Hills area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Lennox HVAC in North Hills
Repair if the heat exchanger is sound, the compressor amp draw is normal, and the repair cost stays under 30% of replacement. Replace if you’re facing multiple major failures or the system uses R-22 refrigerant, which is now prohibitively expensive to recharge. Call (855) 467-1888 for a free diagnostic and honest assessment.
Dirty condenser coils, inadequate airflow from degraded capacitors, or refrigerant overcharge are the usual causes. North Hills’s extreme heat exaggerates all three. We clean coils, verify amp draws, and check superheat and subcooling with digital gauges — not guesswork. Call (855) 467-1888 before the next heat wave.
Yes, especially if it’s never been serviced. Original capacitors, contactors, and duct joints in 1996–1998 North Hills installs are now brittle from decades of 150°F attic exposure. A $80–$200 tune-up often catches failures before they cascade into compressor damage. Call (855) 467-1888 to book.
Absolutely. We regularly install Lennox ductless mini-split systems in original North Hills ranch homes where attic duct runs would be invasive or impossible. These systems deliver heating and cooling without the efficiency losses of compromised ductwork. Call (855) 467-1888 for a layout and quote.
Yes. The City of Los Angeles requires permits for HVAC replacements, including load calculations and final inspection. We handle permit submission and scheduling as part of our installation process — you won’t need to visit the building department yourself.
Service Areas Near North Hills
We cover North Hills and surrounding communities including Lennox service in Canyon Lake, Lennox service in Gilroy, plus West Covina, Vista, Sacramento, San Leandro, Valinda, and Baldwin Park. Same-day service often extends to these areas depending on call volume.
Book Your Lennox Service in North Hills Today
Call (855) 467-1888 for independent Lennox service in North Hills. Jason Trent or one of our field-supervised technicians will diagnose your system, explain exactly what failed and why, and give you written options before any work begins. Same-day appointments available for emergency calls.
Written by Jason Trent, Owner and Field Supervisor at Stonegate Heating & Air California, serving North Hills and the San Fernando Valley since 2008, with Lennox repair in Van Nuys also available.