Navien Tankless Water Heater
Repair in Pasadena, CA
Navien showing an error code or running cold in Pasadena? We’re factory-trained on Navien tankless water heaters and fix most problems the same day, with a flat-rate price up front.
✓ CA C-36 Licensed & Insured
✓ Same-Day Service Available
✓ Free Estimates
✓ Locally Owned
✓ Se Habla Español
Why Navien Tankless Units Stop Working
Navien tankless water heaters are built well, but Southern California’s hard water is tough on them. Scale builds up inside the heat exchanger, the inlet filter clogs, and the condensate drain can back up. Any of these can cause an error code, lukewarm water, or a unit that shuts off mid-shower. The good news: most Navien problems are repairable. We test the actual parts, show you what failed, and fix it with genuine Navien parts.
What We Repair
Navien Error Codes & No Hot Water
The code on your Navien display tells us where to start. E003 means the burner didn’t light. E012 means the flame went out. E016 means the unit is overheating, usually from scale. E030 points to an exhaust problem. We pull the code, test the part behind it, and give you a flat-rate price before any work starts.
Scale is the number one killer of tankless units in Southern California. If your unit hasn't been descaled in the last year, a flush is often the fix and the prevention. See our tankless flush and maintenance page for what's included.
Manufacturer Warranty Replacements
Sometimes the right answer isn't a repair at all — it's a full unit replacement covered by the manufacturer's warranty. If your tankless is within its warranty period and the damage qualifies, the manufacturer may approve a complete unit swap at no parts cost to you. We handle the entire process: diagnosing the failure, contacting the manufacturer on your behalf, removing the old unit and transporting it to their approved location, processing the warranty claim, picking up the new unit, and reinstalling it at your home. You end up with a brand new water heater at the cost of labor only — we handle all the logistics so you don't have to navigate the manufacturer process yourself.
Factory-Trained Navien Service
We’re factory-trained on Navien tankless water heaters, including the NPE and NPN series. We come with descaling equipment and common Navien parts on the truck, so most repairs are finished on the first visit. If your unit is still under the Navien warranty, we’ll tell you and help you use it instead of selling you a part you can get free.
Have a different brand? See our tankless water heater repair page. Unit too old to be worth fixing? See our tankless water heater installation page.
What To Expect
A repair visit starts with the actual diagnosis — error code history, gas pressure at the unit, venting, water flow, and a look at how the unit was installed in the first place. You get a clear explanation of what's wrong and a flat-rate price before any work starts. Our $49 diagnostic fee is credited toward the repair. If we find the unit isn't worth repairing — a cracked heat exchanger on a fifteen-year-old unit, for example — we'll say so plainly and show you why, then give you replacement options without pressure. Most repairs and descaling services are completed in a single visit, usually within two hours.
1
Call or Text
Same-day service available in most areas
2
Upfront Quote
$49 diagnostic, credited toward the repair
3
Professional Repair
Professional Repair — Most repairs completed in one visit
Navien Tankless Repair Across
Greater Los Angeles
If your Navien tankless is throwing a code, running cold, or you can't remember the last time it was flushed, give us a call — we serve Pasadena, the San Gabriel Valley, Greater LA, the San Fernando Valley, and surrounding Southern California communities.
Tankless service by city: Arcadia · San Marino · South Pasadena · Altadena · Sierra Madre · Monrovia · Temple City · San Gabriel · Glendora · La Verne · Claremont · Diamond Bar · Walnut · La Cañada Flintridge · La Crescenta · Glendale · Burbank · Eagle Rock · Silver Lake & Los Feliz · Toluca Lake · Studio City · Sherman Oaks · Encino · Tarzana · Woodland Hills · Porter Ranch · Calabasas · Agoura Hills · Westlake Village · Beverly Hills · Hancock Park · Bel Air · Westwood · Brentwood · Pacific Palisades · Malibu · Santa Monica · Manhattan Beach · Palos Verdes Estates · Rancho Palos Verdes
Frequently Asked Questions
-
Once a year across most of Southern California, given how hard our water is. If you have a water softener you can often stretch it further. If you've never had yours flushed and it's more than three years old, that's the first thing worth doing.
-
E003 means the burner tried to light and couldn’t. Common causes are a dirty igniter or flame rod, low gas pressure, or a blocked air intake. It’s one of the most common Navien codes, and we can usually fix it in one visit.
-
Depends on age and what failed. Under ten years with a component failure is almost always worth repairing. Fifteen-plus years with a cracked heat exchanger usually isn't. We'll show you what we found and give you both numbers, then let you decide.
-
That's the cold water sandwich, and it's the most common tankless complaint across Greater LA. It happens because there's already-cooled water sitting in the line between the unit and the fixture. Sometimes it's fixable with a setting change or a recirculation loop, sometimes it's inherent to how the system was laid out.
-
Yes. Most of our tankless repair calls across Southern California are on units another company installed. We'll diagnose it the same way and tell you what we find.
-
Yes, and it's the main reason units fail early across Southern California. Scale coats the heat exchanger, restricts flow, and forces the burner to overwork. A softener plus annual descaling is the single best thing you can do for the lifespan of a tankless unit.
-
No — tankless manufacturers cover the unit itself, not the labor. If your heater qualifies for a warranty replacement, the manufacturer provides the new unit at no parts cost, but you still pay a licensed plumber to remove the old unit, handle the transport and warranty process, and install the new one. We're upfront about that from the start so there are no surprises. What you're getting is a brand new heater at the cost of professional labor — which is still a significant savings compared to buying a new unit out of pocket.
Serving 60+ Cities Across
Greater Los Angeles
Fast service and the same fair prices, whether you’re in Beverly Hills, Burbank, or Arcadia. We cover Greater LA and never charge extra for the drive.
San Gabriel Valley & Foothills
Pasadena, Altadena, Sierra Madre, La Cañada Flintridge, La Crescenta, Monrovia, Duarte, Arcadia, Temple City, San Marino, South Pasadena, Alhambra, San Gabriel, Rosemead, Glendora, San Dimas, La Verne, Claremont, Covina, West Covina, Walnut, Diamond Bar, Hacienda Heights, Rowland Heights
Northeast & Central Los Angeles
Eagle Rock, Highland Park, Glendale, Mount Washington, Silver Lake, Los Feliz, Hancock Park, Echo Park, Atwater Village, Hollywood, Downtown LA
Westside & Beach Cities
Beverly Hills, West Hollywood, Bel Air, Brentwood, Westwood, Century City, Santa Monica, Culver City, Mar Vista, Pacific Palisades, Venice, Malibu, Manhattan Beach, Palos Verdes Estates, Rancho Palos Verdes
San Fernando Valley
Burbank, Toluca Lake, North Hollywood, Studio City, Sherman Oaks, Encino, Tarzana, Woodland Hills, Van Nuys, Valley Village, Sunland-Tujunga, Northridge, Granada Hills, Porter Ranch, Chatsworth, West Hills, Calabasas, Hidden Hills, Agoura Hills, Westlake Village
Don't see your city? Call us — we likely still cover you.
Get Your Hot Water Back Today.
Same-day tankless diagnosis and repair from a licensed C-36 plumber who specializes in these units across Greater Los Angeles and Southern California. $49 diagnostic, credited toward the repair, and a flat-rate price before anything starts. Call or book online.