Emergency Tankless Water Heater Repair in San Jose — 24/7

Do this before we arrive

A few safe steps can limit damage and sometimes restore hot water on the spot.

• Smell gas? Leave the building, then call PG&E from outside. Don't switch anything on or off.
• Water actively leaking? Close the cold-water isolation valve at the unit, or the main shutoff.
• Write down the error code on the display before you reset anything — it tells us what failed.
• Try one power cycle: turn the unit off at the switch, wait 30 seconds, turn it back on.
• If the code returns immediately, stop resetting. The unit is protecting itself.
• Text us a photo of the unit's rating plate and the display when you call.

Emergencies we handle around the clock

Not every failure is an emergency, and we'll tell you honestly if yours can wait for a scheduled visit at a lower cost.

• Total loss of hot water in an occupied home or business
• Active leaks at the unit, valves, or connections
• Repeated lockouts on E003, E012, E016, E030, or E110
• Exhaust or combustion concerns, including a carbon monoxide alarm (call 911 first)
• Restaurants, salons, and multifamily properties that cannot operate without hot water
• Freeze-damaged or storm-affected exterior units

Why a specialist matters at 2 a.m.

An after-hours generalist will usually reset the unit and leave. We read the stored fault history, test gas pressure under load, and carry the parts that actually fail on Navien equipment — flame rods, igniters, flow sensors, valves. That's the difference between one visit and three.

Commercial emergency response

For restaurants, salons, gyms, and multifamily buildings, downtime costs money by the hour. We prioritize commercial no-hot-water calls, and on cascade systems we can often isolate a failed unit and keep the rest of the rack producing while parts arrive.