Navien Error Code 012: Causes & Repair in Indianapolis
Navien Error Code 012 indicates a flame loss condition. This means the unit ignited but could not maintain flame or properly detect flame during operation. Common causes include gas supply issues, venting problems, dirty flame rods, ignition problems, or combustion issues.
If your Navien is displaying Error Code 012, Hot Water Pros can diagnose and repair the issue quickly throughout Indianapolis and surrounding areas.
QUICK ANSWER
What Navien Error Code 012 Means
Error 012 is a flame loss: the burner lit, but the flame went out or the control board lost track of it while the unit was running.
Top 3 causes
Low gas pressure or an interrupted gas supply
A dirty flame rod or faulty igniter
Blocked intake or exhaust venting
When to call a pro
If 012 keeps returning or the unit needs frequent resets, schedule Navien tankless water heater repair. Flame loss usually takes gas pressure and combustion testing to pin down. Older unit with repeat errors? Compare the repair with a new tankless water heater.
BEFORE YOU CALL
Safe Things To Check First
Other gas appliances: If your stove or furnace won't light either, the problem may be your gas service. Call your gas utility.
Gas supply: Check that the gas valve at the heater is open (handle in line with the pipe) and, on propane, that the tank isn't empty. If a valve is off and you don't know why, call us before turning it on.
Power and one reset: Make sure the breaker hasn't tripped, then reset the unit once. If 012 comes back, stop and call.
Leave it to a pro: removing the cover or working on the gas valve, igniter or flame rod. Smell gas? Leave the house and call your gas utility or 911 from outside.
Code changed to 003? Read our Navien error code 003 guide. Still showing 012? Call 317-922-9043 or book online.
Common Causes Of Navien Error Code 012
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Low gas pressure
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Gas supply interruption
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Dirty flame rod
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Faulty igniter
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Blocked intake or exhaust vent
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Condensate drain issues
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Improper combustion
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Defective gas valve
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Loose electrical connections
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Control board communication issues
These are among the most commonly reported causes associated with Error Code 012 flame loss conditions.
Can I Fix Navien Error Code 012 Myself
Homeowners can check:
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Gas shutoff valves
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Exterior vent terminations
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Air intake openings
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Power supply to the unit
However, diagnosing flame loss often requires combustion testing, gas pressure verification, and inspection of internal components. Most Error Code 012 repairs should be performed by a qualified technician.
What Does Navien Error Code 012 Mean?
Navien Error Code 012 means the unit has experienced flame loss. The burner either failed to maintain combustion or the control board lost flame verification during operation. When this occurs, the water heater typically shuts down to protect the system and prevent unsafe operation.
Signs You Need Professional Navien Repair
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No hot water
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Repeated Error Code 012 shutdowns
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Unit requires frequent resets
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Intermittent hot water
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Gas odor near appliance
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Ignition failures
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Rumbling or unusual burner operation
Why Indianapolis Homeowners Choose Hot Water Pros
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Licensed Indiana plumbing contractor
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Navien tankless water heater experience
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Same-day service available
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Tankless maintenance and flushing
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Upfront pricing
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Serving Indianapolis, Carmel, Fishers, Westfield, Noblesville, Greenwood, Brownsburg, Whitestown, and Zionsville
We Repair All Major Navien Models
Our technicians service all major Navien tankless water heater models including:
• Navien NPE-240A2
• Navien NPE-210A2
• Navien NPE-180A2
• Navien NPE-S2 Series
• Navien NCB Series
• Navien NHB Series
Navien NPE-240A2
199,000 BTU
Navien NPE-210S2
180,000 BTU
Navien NPE-240S2
199,000 BTU
Navien NPE-180A2
150,000 BTU
Navien Error Code 012 Repair FAQs
What is Navien Error Code 012?
Navien Error Code 012 indicates flame loss or ignition failure during operation.
Can low gas pressure cause Error 012?
Yes. Low gas pressure is one of the most common causes of flame loss errors.
Will resetting my Navien fix Error 012?
A reset may temporarily clear the code, but the underlying issue often remains and should be diagnosed.
Can a dirty flame rod cause Error 012?
Yes. A contaminated flame rod can prevent proper flame detection and trigger the error.
How much does it cost to fix Navien Error Code 012?
Repair costs depend on the cause. We provide upfront pricing before any work begins, and warranty coverage is available on qualifying repairs.
Do you repair Navien Error Code 012 in Indianapolis?
Yes. Hot Water Pros provides Navien Error Code 012 diagnosis and repair throughout Indianapolis and surrounding communities, with same-day service available. Call or text 317-922-9043 to schedule.
Locally Owned & Operated
Hot Water Pros proudly provides Navien Error Code 012 repair throughout Indianapolis, Carmel, Fishers, Westfield, Noblesville, Greenwood, Brownsburg, Whitestown, Cicero, and Zionsville. Our Navien trained technicians can quickly diagnose flame loss and ignition problems and restore reliable hot water to your home.
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