Lennox HVAC in Agoura, CA | Stonegate Heating & Air California
Lennox service in Agoura Hills typically runs $150–$700 for repairs and $3,500–$7,500 for full system replacement, with most calls completed same day. What sets our Lennox work apart in Agoura is 16 years of hands-on experience with the exact failure patterns this city’s marine-to-inland climate transition creates — from Merit 13ACD coil leaks to Signature Series control boards cooked in 150°F attics during Santa Ana wind events. Call (855) 467-1888 for a free estimate.
Why Agoura Residents Choose Us for Lennox Service
We’ve been working on Lennox equipment in Agoura since before the 2018 Woolsey Fire, back when half the current housing stock still ran original R-22 systems. Jason Trent, our owner and field supervisor, grew up in the San Fernando Valley and did his HVAC training at Los Angeles Trade-Technical College — he knows what it means to spend August without working AC, and he still shows up personally on the bigger jobs because he won’t delegate a final walkthrough.
That matters for Lennox owners because these systems reward technicians who actually read the fault codes instead of guessing. We’ve got 499 verified reviews at 4.7 stars, and a lot of them mention the same thing: we diagnosed what two other companies missed. We’re not a Lennox-authorized dealer — we’re an independent shop that services nine major brands, which means no corporate playbook telling us to sell you a new unit when your Elite Series needs a $200 capacitor.
We stock OEM Lennox control boards and heat exchangers, plus quality aftermarket capacitors and contactors for the routine stuff. For Agoura, that local inventory means we’re not ordering parts from a warehouse in Texas while your house hits 95°F.
Common Lennox HVAC Problems We Solve in Agoura
- Merit 13ACD evaporator coil micro-leaks. Agoura’s unique climate — cool marine mornings from Malibu Canyon, then rapid afternoon heating — creates constant thermal expansion and contraction in copper joints. We’ve replaced dozens of these coils in the 91301 ZIP, especially in homes where the air handler sits in a vented attic that sees 40°F swings in a single day.
- Pulse 21 heat exchanger cracking. The Santa Ana winds don’t just blow hot; they force your furnace to cycle from idle to full fire multiple times in an hour. That thermal shock finds any fatigue in a 20-year-old Pulse 21 exchanger. We inspect with a borescope, and if we find cracks, we red-tag the unit — no exceptions, no patch jobs.
- Signature Series SL28XCV control board failure. Those variable-speed boards are sensitive to heat, and Agoura’s hillside homes on Las Virgenes Road can see attic temps exceed 150°F when Diablo winds suppress overnight cooling. We relocate boards to conditioned space when possible, or spec heat-shielded replacements.
- Elite Series EL16XC1 capacitor failure. Malibu Canyon pushes marine humidity into Agoura on summer mornings, then the Santa Anas strip it dry by afternoon. That humidity swing degrades run capacitors faster than in inland valleys with steadier conditions. We check capacitance on every service call — it’s a $150 fix that prevents a $2,000 compressor replacement.
- Post-Woolsey Fire smoke infiltration in ductwork. Even homes that didn’t burn often pulled combustion particulates through return leaks during the fire. We still get calls every October when offshore winds remind homeowners their Lennox furnace smells like a campfire on first heat. The fix is duct sealing plus filtration upgrades, not just a new filter.
Lennox Service in Agoura: What Local Conditions Mean for Your Equipment
Agoura sits at the mouth of Malibu Canyon where marine air pushes inland from the Pacific, creating one of the sharpest coastal-to-inland climate transition zones in greater LA. Residents experience dramatic diurnal swings and periodic Santa Ana wind spikes into the 100s, demanding HVAC systems sized and controlled for both extremes. The 2018 Woolsey Fire burned directly through large swaths of Agoura Hills, destroying and damaging hundreds of homes; the post-fire rebuild wave means a significant share of the housing stock now carries post-2018 Title 24–compliant systems, while surviving older homes have owners acutely primed for smoke-infiltration and air-quality upgrades. We also provide Lennox service in Oak Park for homeowners facing similar challenges.
For Lennox owners, this creates a split market we navigate weekly. The rebuilt homes on Lake Vista Drive often have tight envelopes with modern variable-speed equipment — but the original 1970s ductwork in surviving homes on Las Virgenes Road is undersized for today’s high-static Lennox blowers. We’ve custom-fabricated sheet metal transitions where standard collars won’t fit in 18-inch attic clearances. The system will tell you what’s wrong — you just have to know how to listen. In Agoura, it’s often telling you the ductwork and the equipment were never designed for each other.
Lennox Models & Products We Service in Agoura
We work on the full Lennox sales & service lineup, from budget-tier Merit to flagship Signature:
- Merit Series: 13ACD, 14ACX — the R-22 and early R-410A workhorses still common in pre-Woolsey Agoura homes. We stock replacement coils and compressors, but we’ll also tell you honestly when a 14+ year old Merit unit with a major leak is a money pit.
- Elite Series: EL16XC1 — mid-tier efficiency, popular in 1990s tract homes. Capacitor and contactor failures are routine; we carry aftermarket equivalents for same-day repair.
- Signature Series: SL28XCV, XP25 — variable-speed precision equipment that demands proper duct sizing. We’ve commissioned these in post-fire rebuilds where the builder actually spec’d correct static pressure.
- Pulse 21 furnace: Aging but still running in some Agoura Hills originals. Heat exchanger safety is non-negotiable; we replace with OEM only.
For critical components — heat exchangers, control boards, refrigerant metering devices — we use Lennox OEM. For capacitors, contactors, and standard electrical, we stock proven aftermarket that meets or exceeds spec. Our Agoura inventory is sized for same-day completion on 80% of calls.
Lennox Service Pricing in Agoura
| Service | Typical Range | What Affects Cost |
|---|---|---|
| AC Repair (diagnosis + capacitor/contactor) | $150–$650 | Part type, refrigerant charge, attic access difficulty |
| Furnace Repair (gas valve/ignitor) | $150–$700 | OEM vs. aftermarket part, heat exchanger condition |
| AC Installation (Lennox Elite 16 SEER 2.5–4 ton) | $3,500–$7,500 | Duct modifications, electrical upgrades, permit fees |
| Tune-Up (spring/fall system check) | $80–$200 | System age, accessibility, whether we find deferred maintenance |
Every estimate starts with a free in-home assessment. We’ll show you exactly what we found, what it costs, and what happens if you wait. No pressure — our 499 reviews weren’t built on pushy sales. For an exact quote on your Lennox system in Agoura, call (855) 467-1888.
Serving Agoura, CA — Our Local Coverage Area
We’re based in the Agoura area and know this community well. We also offer Lennox in Westlake Village. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Lennox HVAC in Agoura
We can usually repair it if the compressor runs and the coil leak is accessible. If the unit is 14+ years old and needs a major refrigerant component, replacement wins on long-term value. We stock replacement coils for the 13ACD but won’t install one without checking whether your ductwork can handle the original charge spec. Call (855) 467-1888 and we’ll give you a straight answer after diagnosis.
Yes. Agoura Hills falls under Los Angeles County building jurisdiction, and any furnace replacement requires a permit with a Title 24 compliance check. We pull permits on every installation and coordinate the inspection — it’s included in our project price, not tacked on later.
The SL28XCV or EL16XC1 paired with a zoning panel, depending on your duct layout. Post-fire rebuilds in Agoura are better insulated than originals, so we can often downsize tonnage and gain efficiency. We always perform a Manual J load calculation — never a rule-of-thumb replacement. For a rebuilt ranch with modern envelope specs, the SL28XCV’s variable capacity handles Agoura’s wild load swings without short-cycling.
Combustion particulates infiltrated your return ductwork through leaks during the fire, and they’re reactivating when the heat exchanger warms them. The smell means your ducts are dirty and leaky, not that your furnace is failing. We seal returns with mastic, clean accessible trunk lines, and recommend a MERV-13 or whole-home HEPA cabinet — Agoura gets this call every October when offshore winds return. Call (855) 467-1888 for a duct assessment.
We measure static pressure with a manometer during our free estimate. Agoura’s 1970s–1990s homes often have 0.1-inch undersized returns that choke variable-speed blowers. On Lake Vista Drive, we replaced a 20-year-old Merit 13ACD on a home rebuilt after the Woolsey Fire. The outdoor unit was installed on a slope that had settled 2 inches, pulling the line set tight. We re-leveled the pad, installed a new SL28XCV with a custom transition to the existing supply trunk, and added a MERV-13 filter cabinet — the homeowner now sees balanced temps across two floors instead of a 10°F difference. If your ducts won’t support the upgrade, we’ll show you the numbers and quote the modification honestly.
Service Areas Near Agoura
We run AC Repair & Installation in Agoura as our home base, with regular routes into neighboring communities. Our technicians also handle Lennox service in Mentone and Lennox service in Watsonville as part of our broader California coverage. Nearby areas we serve from Agoura include West Covina, Vista, Sacramento, San Leandro, Valinda, and Baldwin Park — same owner-supervised standards, same multi-brand expertise.
Book Your Lennox Service in Agoura Today
Same-day availability for Thousand Oaks Lennox service and Agoura calls when you reach us before noon. Jason Trent or one of our senior techs will diagnose your system, explain what it’s actually doing wrong, and fix it with the right parts — OEM when safety demands it, aftermarket when it makes sense. Call (855) 467-1888 for your free estimate.
Written by Jason Trent, Owner and Field Supervisor at Stonegate Heating & Air California, serving California homeowners and businesses since 2008.