Lennox Furnace Repair Nationwide

Lennox Furnace Repair in San Jose: What to Know First

We provide independent Lennox furnace repair in San Jose, and most jobs are completed the same day we diagnose them. A typical Lennox furnace repair runs $175 to $825 depending on what failed, and you’ll have a written price in hand before we open the toolbox. This page is for San Jose homeowners with a Lennox furnace that’s short-cycling, blowing cold air, making noise, or refusing to start. If your heat is out right now, call (669) 800-4179 and a live person answers, day or night.

Call (669) 800-4179

How Lennox Products Fail – and How We Fix Them

Lennox builds good furnaces, but twenty years of pulling panels off them in San Jose has shown us where each series tends to stumble. Here’s what we actually see, by model family:

• Lennox Elite Series (EL296, EL195): The two-stage gas valve is the most common failure point on this line. The valve sticks partway between low and high fire, so the furnace never reaches full heat output. Homeowners notice lukewarm air at the registers and a gas bill that climbed for no obvious reason. We replace the valve and verify both stages fire correctly before we leave.
• Lennox Merit Series (ML193, ML180): These entry-level units use a single-stage gas valve and a simpler control board, but the ignitor is the part that goes most often. On Merit models the ignitor is a nitride element that gets brittle after five or six seasons. When it cracks, the furnace won’t light at all. The good news: ignitor replacement on a Merit is usually a quick, lower-cost repair.
• Lennox Signature Series (SLP98, SLP99): The variable-speed blower motor is the heart of these premium furnaces, and when the module fails the furnace runs the inducer but won’t move air. San Jose homes with these units tend to run the fan continuously for air filtration, which adds hours to the motor. We diagnose the module first, because replacing the entire motor when only the control module died is a waste of your money.
• Lennox G51 and G61 (legacy, still common in San Jose): These older units crack heat exchangers more than any other Lennox line we see. The G51’s stamped clamshell exchanger had known weak points at the crimp lines. If your San Jose home has a G51 or G61 over 18 years old and the CO detector has gone off, shut the furnace down and call us. We scope the exchanger before condemning it because a crack in the wrong place can sometimes mean replacement is smarter than repair.
• Lennox condensing furnaces (any 90%+ AFUE): Condensate drain blockages are the sneaky failure. San Jose’s hard water leaves mineral deposits that narrow the trap, and once it clogs the pressure switch trips and the furnace locks out. It looks like an electrical problem, but it’s usually a clogged trap we clear in under an hour.

Every Lennox furnace we touch gets a full sequence-of-operation check, not just the one part that failed. That habit comes from Victor Mancini’s logbook, which goes back decades and has saved more than one San Jose homeowner from a second breakdown the week after we left.

Our Lennox Furnace Repair Process

Here’s exactly how a Lennox repair goes when you call Cold Harbour Heating and Air San Jose:

1. 1
   You call (669) 800-4179. A live person answers, 24/7. We ask what the furnace is doing, what model it is, and when it started acting up. That tells us which parts to load on the truck.
2. 2
   We show up in the window we promised. Our technician is uniformed, background-checked, and driving a marked van. You know who’s at your door.
3. 3
   We diagnose in front of you. We’re not secretive about what we’re testing. We’ll show you the failed ignitor, the stuck gas valve, or the fault code the board is throwing, and explain what it means in plain English.
4. 4
   You get a written price before any work starts. The number on that sheet does not change at the door. If the repair needs an OEM Lennox part that costs more than aftermarket, we tell you the difference and let you decide.
5. 5
   We fix it and test it. We run the furnace through a full heat cycle, check gas pressure, and verify the flame sensor reads properly. No “it should be fine now” send-offs.
6. 6
   You get the 365-Day Done Right Promise in writing. If that repair fails within a year, we come back and fix it again at no charge. That’s not a verbal promise, it’s on paper before we leave.

What Lennox Furnace Repair Costs in San Jose

Most Lennox furnace repairs in San Jose land between $175 and $825. The table below shows what we typically charge for common Lennox jobs, parts and labor included:

• Ignitor replacement (Merit and Elite series): $175 – $320
• Flame sensor cleaning or replacement: $175 – $260
• Gas valve replacement (Elite two-stage models): $385 – $725
• Condensate drain or trap clearing: $195 – $310
• Pressure switch replacement: $240 – $420
• Blower motor module (Signature series): $420 – $825

What moves the price is the part itself. OEM Lennox gas valves cost more than aftermarket, and Signature-series variable-speed motors are the most expensive components in the lineup. We always give you the OEM option and the quality aftermarket option with honest trade-offs, then you choose. Call (669) 800-4179 for a free estimate and we’ll give you a firm number, not a guess.

Why San Jose Homeowners Call Cold Harbour Heating and Air San Jose for Lennox Work

We’re an independent Lennox service provider, which means we answer to you, not to a manufacturer’s warranty department. We service all nine major residential brands including Carrier, Trane, and Lennox, so the technician at your door can work on whatever system is actually in your home. Every repair carries the 365-Day Done Right Promise: if it fails inside a year, we return and correct the work at no charge, and that’s in writing before we leave. The Kingswell Way runs through everything we do: say the price before the work, show up in the window given, leave the place cleaner than we found it, put the guarantee on paper, and come back if it fails. Victor Mancini and our crew have kept a logbook of every San Jose job for years, and we check it before every estimate so we never walk into a house blind. A cold harbour was a roadside shelter where travelers waited out the weather. Comfort in any season is the job.

FAQs