AC repair
Furnace & heating
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateLennox HVAC in Hayward, CA | Brandt HVAC Co San Francisco
We provide independent Lennox HVAC service across Hayward, from Hayward Furnace Repair and heat pump repair to full system replacements and ductless installs. The thing that sets our Lennox work apart here is simple: we know how Hayward’s damp bay air and older housing stock actually affect Lennox equipment, because we’ve been fixing it in these neighborhoods for years. We’re not a Lennox dealer and we’re not manufacturer-affiliated, which means we recommend what’s right for your home, not what moves inventory. If your Lennox system is acting up, call us at (559) 245-8807 and we’ll tell you straight what’s wrong and what it’ll cost.
Why Hayward Residents Choose Us for Lennox Service
Devin Marlowe, our owner, got his start at Los Angeles Trade-Technical College and has spent more than two decades doing hands-on HVAC work across California. He and our crew have repaired the full Lennox line, from the old G40 and G50 furnaces still heating plenty of Hayward ranchers to the current Signature and Elite Series. That range matters. A tech who only sees new equipment doesn’t know what a 1998 G40 sounds like when its inducer bearing is going out. We do.
Every Hayward job starts with a written price before any work begins. No work starts until you see and agree to the cost in writing. Every repair includes a written guarantee, and if that repair fails within the guarantee period, we return at no charge under our 365-Day Done Right Promise. We stock Lennox OEM-compatible parts locally for faster turnaround, and we quote genuine Lennox OEM parts first, especially for heat exchangers, gas valves, and inverter boards. Aftermarket parts can void remaining warranty and don’t match Lennox’s modulation curves. You deserve better than a gamble.
You’ll also know exactly who’s coming to your door. Every technician is background-checked and identity-verified under our Threshold Verified standard, sent to you by name and photo before arrival, and they’ll show a photo ID badge when they knock. If anyone shows up you weren’t told to expect, that visit is on us and we make it right.
Styles & brands we work with
Common Lennox HVAC Problems We Solve in Hayward
Here’s what we see most often on Lennox equipment in Hayward, and why it happens here specifically:
- SLP98V modulating gas valve short-cycling and flame sensor corrosion. Hayward’s cool, damp winters are rough on these furnaces. The flame sensor picks up moisture-driven corrosion, and the pressure switch flutters when bay fog rolls through. We clean or replace the sensor and verify the pressure switch calibration before touching the gas valve itself; most of the time that’s all it needs.
- XC25 and EL18XCV inverter boards throwing “communications fault” codes. These are Lennox’s premium variable-capacity air conditioners and heat pumps, and their ribbon cables oxidize in bay-air humidity. The board loses contact with the outdoor unit and the whole thing locks out. We open the panel, clean the ribbon contacts, and reseat the harness, which solves it in most cases.
- Merit ML180 heat exchanger cracks. The two-stage ML180 is especially prone to hairline cracks by year 12 to 14, and there’s often no visible soot to warn you. These cracks are caught during tune-ups, not because the furnace failed dramatically. If you have an ML180 over a decade old and haven’t had the heat exchanger inspected, schedule a tune-up rather than waiting for a carbon monoxide scare.
- Ductless MLA unit fin corrosion and vibration near the airport. In the flatlands near the Hayward Executive Airport, outdoor MLA mini-split coils take on salt-tinged fog off the bay, which corrodes the aluminum fins faster than typical inland units. Aircraft overflights add micro-vibration that loosens flare fittings over time. We see refrigerant leaks from those fittings, and we check torque on every Hayward ductless service call as a matter of course.
- G40 and G50 furnaces with cracked heat exchangers. These older Lennox furnaces are still common in Hayward’s 1950s and 1960s ranch homes. A cracked heat exchanger in these units is a safety issue and often a repair-versus-replace decision. We’ll show you the crack with a borescope camera and give you honest numbers on both paths before you spend a dollar.
Lennox Service in Hayward: What Local Conditions Mean for Your Equipment
Here’s the Hayward-specific reality most Lennox owners don’t hear from a generic service company: in the flatlands near the Hayward Executive Airport, a huge number of 1950s ranchers still run on original wall furnaces with no ducting at all. When a Lennox wall furnace in one of these homes cracks its heat exchanger, we often bypass repair entirely and install a ductless MLA mini-split instead. That single change adds cooling those homes never had, and it removes the safety risk of running a cracked exchanger. We’ve done exactly this on Silva Avenue in the Burbank neighborhood and along many similar streets in the flatlands. It’s a Hayward-specific fix that a company unfamiliar with this housing stock would likely miss. The bay-influenced mild climate means heating, not cooling, drives system sizing here, and that changes how we think about equipment recommendations for Lennox owners in Hayward compared to, say, someone in Concord or Livermore.
Lennox Models & Products We Service in Hayward
We work on the entire residential Lennox line, across all three tiers. That includes Signature Series equipment like the SLP98V variable-capacity furnace and XC25 air conditioner, Elite Series like the EL296V two-stage furnace and EL18XCV variable-capacity heat pump, Merit Series like the ML180 furnace and ML17XC1 air conditioner, and the MLA and MPB ductless mini-split lines. Our parts approach is consistent: we quote Lennox OEM parts first because they match the modulation curves and combustion specs of your specific unit, and they protect any remaining warranty. For common Hayward repairs we keep OEM-compatible capacitors, flame sensors, igniters, and contactors on the truck, which means most furnace and our AC Repair in Hayward calls are finished on the first visit. Heat pump repair, ductless system work, and UV air purifier installs are particular focuses for us in Hayward.
See the difference
Before
After
Before
After
Before
AfterLennox Service Pricing in Hayward
We publish our price ranges because you should know what to expect before you call. Here’s what Lennox service typically runs in Hayward:
| Service | Typical Price Range |
|---|---|
| Heat Pump Repair | $150 – $650 |
| Furnace Repair | $150 – $700 |
| AC Installation | $3,500 – $7,500 |
| Tune-Up | $80 – $200 |
What drives the cost is the part, not the neighborhood. A modulating gas valve on an SLP98V costs more than a flame sensor on an ML180, and that shows up in the final number. Every free estimate includes a written breakdown of parts, labor, and the exact scope of work, so there’s zero guesswork. Call (559) 245-8807 for an exact quote on your Lennox system, estimates are free.
Serving Hayward, CA - Our Local Coverage Area
We’re based in the Hayward 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 Hayward
Short-cycling on cool, damp Hayward mornings is almost always a flame sensor issue or a pressure switch flutter, not a gas valve failure. The SLP98V’s flame sensor corrodes faster in bay-air humidity, and when it can’t confirm flame, the board shuts the burners down as a safety measure. We clean or replace the sensor and verify pressure switch calibration first, which solves it in most Hayward homes we visit. If it’s still cycling after that, call (559) 245-8807 and we’ll dig deeper.
Yes, in most Hayward homes without ductwork or with undersized ducts, you can add a Lennox ductless MLA mini-split as a separate cooling source instead of trying to force central air through original mid-century ducting. That’s the right call in flatlands ranchers near the airport and many 1950s-1970s splits. For homes with adequate ductwork, we can add a properly sized Lennox AC coil to your existing furnace. Call (559) 245-8807 and we’ll tell you which path fits your house.
For Hayward’s mild climate, a Lennox heat pump is often the smartest choice, even if you think of yourself as someone who rarely needs cooling. Hayward’s system sizing leans heating-heavy anyway, and a modern Lennox Elite or Merit heat pump handles our damp winters efficiently while giving you real cooling capacity for the occasional heat spike without a separate AC system. For homes near the industrial corridor where air quality is a concern, we often pair a heat pump with a Lennox PureAir UV purifier. Call (559) 245-8807 for a load calc and a straight answer on whether it pencils out for your specific home.
You typically can’t tell on your own, because the hairline cracks these two-stage heat exchangers develop by year 12 to 14 produce no visible soot or odor in the early stages. The reliable way is a camera inspection during a tune-up, where we run a borescope through the heat exchanger and show you exactly what we see on the screen. If your ML180 is over a decade old and has never had that inspection, book a tune-up rather than waiting for a failure. Call (559) 245-8807 to schedule one.
Yes, the Lennox EL296V two-stage furnace runs at a low-stage airflow that’s noticeably quieter than the single-stage units most split-levels in Hayward still have, and it’s a common upgrade in these homes. The SLP98V is even quieter at its lowest modulating stage. The real fix for duct noise in mid-century split-levels is sealing and properly sizing the original ductwork, which we do alongside the furnace swap whenever the home needs it. Call (559) 245-8807 and we’ll tell you which furnace is worth the money for your specific floor plan.
Service Areas Near Hayward
Along with Hayward, our Lennox service coverage includes Lennox service in San Francisco, Lennox service in Oakland, Berkeley, Richmond, and the surrounding East Bay communities. If you’re in the flatlands, the hills, or anywhere in between, call us. For a broader look at what we do, see our Lennox sales & service page, or check our Hayward service area page for full local coverage details.
Book Your Lennox Service in Hayward Today
Tell me what it’s doing, and I’ll tell you exactly what it needs. That’s how Devin runs every diagnostic. Same-day service is often available for furnace and heat pump repairs in Hayward, and every job starts with a written price before any work begins. Call (559) 245-8807 for your free estimate, and a real person will answer, 24/7.
Written by Devin Marlowe, Owner at Brandt HVAC Co San Francisco, serving Hayward and the East Bay since 2003.