Water Heater Repair – Fast, Reliable Service for Tank & Tankless Units
Is your hot water running out too quickly? Hearing strange noises from your water heater? At #1 Honest Plumber Inc., we offer expert water heater repair services for both tank and tankless systems. Homeowners across Sunnyvale and the entire South Bay Area count on us for fast, accurate diagnostics and honest repair work that restores hot water without the upsell.
Whether it’s a leaky tank, a failed pilot light, or low water pressure from your tankless system, we’re ready to help.

Signs Your Water Heater Needs Repair
Your water heater may still be running, but any of these signs can indicate that a repair is necessary:
- Water takes too long to heat
- Hot water runs out faster than usual
- Strange popping or banging sounds
- Discolored or rusty water
- Low water pressure in hot taps only
- Water leaking from the tank or piping
- Pilot light won’t stay lit (for gas heaters)
- Error codes or shutdowns on tankless units
Don’t wait until your water heater completely fails—early intervention can save you from water damage and high replacement costs.
We Repair All Major Water Heater Brands
We work on both tank and tankless units from leading manufacturers including:
- Rheem
- Bradford White
- AO Smith
- Rinnai
- Navien
- Noritz
- Bosch
- Takagi
Our technicians carry the most common OEM parts for quick turnaround and minimal downtime.
Our Services
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Tank Water Heater Repairs
If your tank-style water heater is showing signs of wear, we can:
- Replace failed heating elements or thermostats
- Flush sediment buildup from the tank
- Replace corroded anode rods to extend system life
- Repair or replace faulty temperature/pressure relief valves
- Fix leaking fittings, drain valves, and dip tubes
We’ll also inspect your plumbing connections to ensure no leaks or performance issues are coming from faulty lines or valves.
Tankless Water Heater Repairs
Tankless systems are efficient but can experience unique problems. We repair:
- Ignition failures and gas supply issues
- Scaling and mineral buildup from hard water
- Error code diagnostics and resets
- Cold water sandwiching and inconsistent temps
- Failed sensors or thermostats
We’ll also advise on descaling frequency and install isolation valves if needed to simplify future maintenance.
Years of Experince
Why Choose Us
Why Homeowners Trust #1 Honest Plumber Inc.
You get clear, upfront pricing on every job.
Fully qualified to work on water, gas, and hybrid systems.
We never suggest replacements unless absolutely necessary.
15+ years of hands-on repair expertise.
Ed Hinojosa personally ensures every repair is done right.
Serving the Entire South Bay
We provide water heater repair service in:
Schedule Your Water Heater Repair Today
Get your hot water back fast with expert service from #1 Honest Plumber Inc.
#1 Honest Plumber Inc. — Where integrity flows as strong as the water we repair.