Seasonal 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.
Before
After
Before
After
Before
AfterFast, Reliable Furnace Repair Across Los Altos
Furnace repair in Los Altos typically runs $150 – $700 depending on the part and the furnace’s age, and in most cases we can have a technician at your door the same day you call. We work on the mid-century ranch homes and newer builds throughout the city, from the Loyola Corners area to the hills west of Foothill Expressway. If your furnace is blowing cold air, short-cycling, or making a sound you’ve never heard before, call (361) 306-9515 and we’ll send a background-checked technician who puts the price in writing before any work begins.
Why Dalton Heating & Air Is Los Altos’s Preferred Furnace Repair Company
Homeowners in Los Altos call us because we show up inside the stated window and hand them a written price before the first tool comes out. That’s not a promotion – it’s how every job has run since 2003 under The Garrison Standard. Marco Benitez, who leads our team, holds every technician to The Garrison Code: arrive on time, price in writing, do the work by the book, leave the site cleaner than we found it, and stand behind the repair for a full year.
We service all nine major residential HVAC brands, so whether your Los Altos home has a Trane from the 1990s or a newer Lennox, we carry or can quickly source the parts. Our dispatchers answer the phone live, 24/7 – no voicemail queue when your furnace quits on a 38-degree Los Altos night. And because we’re part of the Garrison Partners network, every repair includes the 365-Day Done Right Promise: if it’s not done right, we make it right, free of charge, for a full year.
Emergency Furnace Repair in Los Altos
Emergency Furnace Repair in Los Altos usually means a no-heat call on a cold morning, and we treat those as priority dispatch. The most common triggers we see are failed ignitors, cracked heat exchangers, and blower motors that seize after years of running against restricted ductwork. After-hours diagnostic plus repair in Los Altos runs the same $150 – $700 range as our standard furnace repair – we don’t charge overtime, and you’ll know the number before we start.
Same-Day No-Heat Calls
When a Los Altos furnace stops producing heat entirely, it’s often an ignitor that has cracked or a gas valve that won’t stay open. We carry common replacement parts on the truck, which means many no-heat calls are resolved on the first visit. If the part is unusual, we’ll tell you honestly and schedule the return without leaving you wondering.
Short-Cycling and Overheating
A furnace that fires for two minutes, shuts off, and repeats is short-cycling. In Los Altos’s older homes this is frequently a weak capacitor, a failing blower motor, or a dirty flame sensor. Left alone, short-cycling stresses the heat exchanger, and that’s the part you don’t want to replace.
Furnace Maintenance in Los Altos
Furnace Maintenance in Los Altos is the cheapest insurance against January breakdowns, and it runs $80 – $200 for a full tune-up. We check gas pressure, test the ignitor, inspect the heat exchanger, measure airflow, and clean the flame sensor – the sensor is the number-one cause of preventable no-heat calls in gas furnaces. Homeowners near the Country Club and along Miramonte Avenue book this in October so they’re not waiting in the cold when the first freeze hits.
Annual Safety Inspection
Every tune-up includes a heat exchanger inspection, because a cracked heat exchanger can leak carbon monoxide into the home. In Los Altos’s 1950s and 60s-era ranch homes, years of restricted airflow through undersized ductwork puts extra thermal stress on that part. We’ll show you what we found and write up exactly what needs attention, with prices.
Ductwork Assessment
Many Los Altos furnaces are connected to original duct runs that were never sized for modern systems. During maintenance we measure static pressure and point out leaks or restrictions. Sealing a few joints can change how evenly your home heats – and sometimes it delays a replacement by years.
Trusted Brands We Service in Los Altos
Our technicians are factory-trained to service Trane, Lennox, Goodman, and Rheem furnaces, along with the rest of the nine major residential brands. That means when we open a Goodman unit in a Los Altos mid-century home, we know its failure patterns before we even test it. We keep common parts – ignitors, capacitors, pressure switches, flame sensors – stocked for fast turnaround, and anything unusual we order for next-day delivery. If your home has a Rheem or a Trane, you won’t be told to call someone else.
Common Furnace Repair Problems We See in Los Altos Homes
- Short-cycling in aging furnace closets. Many Los Altos homes built from the late 1940s through the 1960s have furnace closets designed for the original gravity or early forced-air systems. A weak capacitor or failing blower motor in one of those tight spaces causes the furnace to cycle on and off every few minutes, which cooks the heat exchanger over time.
- Cracked heat exchangers from restricted airflow. The original ductwork in Los Altos’s mid-century ranch homes is often undersized for today’s blowers. Years of high static pressure stress the heat exchanger until hairline cracks appear – and that’s a replacement decision, not a patch job.
- Thermostat calibration drift with dual-fuel setups. When a Los Altos homeowner adds a heat pump to an older gas furnace without rebalancing controls, the thermostat can fight itself, switching between stages at the wrong times. We recalibrate and verify the changeover settings so the two systems work together instead of against each other.
- Flame sensor buildup on homes near mature trees. The older neighborhoods west of Foothill Expressway have dense tree cover, which means more dust and fine particulate pulled through return ducts. This coats the flame sensor, and the furnace locks out. A five-minute cleaning usually fixes it – and it’s included in every tune-up.
Pricing for Furnace Repair in Los Altos, CA
| Service | Price Range |
|---|---|
| Furnace Repair | $150 – $700 |
| Furnace Tune-Up / Maintenance | $80 – $200 |
| Emergency Furnace Repair (after-hours diagnostic + repair) | $150 – $700 |
Most furnace repairs in Los Altos land between $150 and $450 – an ignitor, a capacitor, a pressure switch, a flame sensor. The higher end of that range usually means a blower motor or a gas valve. The price you get from us is written down before any work starts, and it doesn’t move at the door. Call (361) 306-9515 for a free estimate – we’ll tell you honestly if the repair makes sense or if you’re better off putting the money toward a replacement.
We Also Serve Cities Near Los Altos
Our Furnace Repair team covers the surrounding area too – Mountain View, Stanford, Palo Alto, and Portola Valley. If you’re just over the border from Los Altos, the same written pricing and the same one-year guarantee apply. See our Furnace Repair in Los Altos page for local specifics.
Serving Los Altos, CA - Our Local Coverage Area
We’re based in the Los Altos 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 About Furnace Repair in Los Altos
The repair-versus-replace line is usually crossed when the repair costs more than 30 – 40% of a new unit, or when the heat exchanger is cracked. In Los Altos, many older furnaces are paired with original ductwork that was never sized for modern efficiency – so replacing the furnace alone may not fix uneven heating. We’ll give you both numbers in writing: what the repair costs now, and what a properly sized replacement would cost. Call (361) 306-9515 and we’ll walk the math with you, no pressure.
A load calculation measures your Los Altos home’s actual heating demand – square footage, insulation, window orientation, duct condition – instead of guessing. Many mid-century ranch homes were built with furnaces sized by rule of thumb, and many are oversized by 20 – 40%. An oversized furnace short-cycles, wastes gas, and dies young. If a load calc shows your existing furnace is too big, replacing it with a right-sized unit can cut your gas bill and extend the new system’s life.
Expect $150 – $700 for most furnace repairs in Los Altos, with common fixes like ignitors, flame sensors, and capacitors landing in the $150 – $300 range. Blower motors and gas valves push toward the upper end. You’ll always get a written price before work starts – that’s part of The Garrison Standard, and it applies to every call including after-hours. Call (361) 306-9515 for a free estimate.
SEER2 is a cooling-efficiency metric that also matters for dual-fuel setups where a Los Altos home pairs a heat pump with a gas furnace. A higher SEER2 means lower electric draw during the cooling season and, in dual-fuel mode, during mild heating days. Since Los Altos sees plenty of 50 – 65°F winter days, a heat pump with a decent SEER2 rating can handle a lot of the heating load and save your gas furnace for the cold nights. We’ll run the numbers on your existing setup before recommending anything.
Check your air filter first – a clogged filter raises static pressure and forces the furnace’s high-limit switch to shut the burners down. If the filter is clean, the cause is likely electrical (weak capacitor, failing blower motor) or a dirty flame sensor. This is a repair, not a DIY adjustment: a furnace that cycles rapidly is working against its own safety limits, and a trained tech should diagnose it. Call (361) 306-9515 and we’ll be out fast.
Contact Dalton Heating & Air for Furnace Repair in Los Altos
If your furnace is acting up in Los Altos – whether it’s a cold house on a January morning, a bang on startup, or a gas smell – call (361) 306-9515 now. Marco Benitez and the Dalton Heating & Air team answer live, 24/7. We’ll give you a written price, show up when we say we will, and guarantee the repair in writing for a full year. Plus the free estimate means you know the number before you commit to anything.
Written by Marco Benitez, Owner at Dalton Heating & Air, serving Los Altos and the surrounding Bay Area.