Water Heater Services in San Jose, CA
No hot water for that morning shower? We repair, replace, and install tank and heat-pump water heaters across the Bay Area.
Water Heater in San Jose & the Bay Area
Few things stop a household faster than no hot water. Promax Service Group repairs, replaces, and installs water heaters across San Jose and the Bay Area — traditional tank units, space-saving tankless systems, and ultra-efficient heat pump water heaters that cut water-heating energy use by up to 70%.
As Navien Service Specialists, we're experts in tankless and condensing systems, and we install every water heater to current California code: seismic strapping, proper venting, expansion tanks, and drip pans. If your unit is leaking, rumbling, or past its 10–12 year lifespan, we'll give you a straight answer on repair versus replacement — with a free estimate either way.
Water Heater, Done Right
Here is what our water heater work covers: system design and installation, repairs on every major brand, seasonal maintenance, and licensed, EPA-certified technicians on every job. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Free in-home estimates on new systems and replacements.
- Full-system design, sizing, and installation
- Repairs on every major brand, with parts on the truck for most first visits
- Seasonal maintenance that prevents costly breakdowns
- Licensed, EPA-certified technicians for every job
What's Included With Water Heater
Every water heater visit covers the items below, and the scope and price are confirmed in writing before any work starts. When it's finished the technician walks you through what was done and what to watch for. We call back within one business hour, 7 AM – 10 PM.
- Straight repair-vs-replace assessment before any work starts
- Seismic strapping, expansion tank, and drip pan brought up to current code
- Proper venting sized for tank, tankless, or heat pump equipment
- Same-day service for no-hot-water calls, 7 days a week
- Free written estimate comparing tank, tankless, and heat pump options
Signs You Need Water Heater
These symptoms can point to a repair, a tune-up, or a system that has reached the end of its life, and a technician can tell you which. The longer a problem runs, the more it tends to cost in energy, repairs, and comfort. Call (669) 777-1997 or book online, and we will find the cause and explain your options.
- No hot water, or hot water that runs out fast
- Rumbling, popping, or banging sounds from the tank
- Rusty or metallic-tasting water
- Water pooling at the base of the tank
- The unit is past its 10–12 year (tank) or 15–20 year (tankless) lifespan
Brands We Service
Promax is a Navien Service Specialist, so Navien equipment is serviced by technicians with factory-backed training. We service the other brands shown here as well, so one team can look after every system in your home. Our trucks carry common parts for these brands, so many small issues found during a visit can be fixed on the spot.
Need water heater help in San Jose?
Related Services
Most water heater jobs touch one of these, and the same licensed Promax team handles all of them. Each page lists what's included, typical costs and the questions San Jose homeowners ask most. Not sure which you need? Call (669) 777-1997 and we'll point you to the right one.
Where We Work
Promax Service Group serves homes and businesses in San Jose, across Santa Clara County, and in nearby Peninsula and East Bay cities. Same-day service for no-cool, no-heat and no-hot-water calls, 7 days a week. Choose your city for local details, or call (669) 777-1997 to confirm we cover your address.
Frequently Asked Questions
How long does a water heater last?
Traditional tanks last 8–12 years; tankless units 15–20 with regular descaling. If your tank is over 10 years old and leaking from the bottom, replacement is almost always the right call — a burst tank can cause serious water damage.
Tank vs. tankless — which is better for my San Jose home?
Tankless costs more upfront but delivers endless hot water, lasts nearly twice as long, and saves space and energy. A standard tank is cheaper to install and simpler to maintain. We'll size both options in your free estimate so you can compare real numbers.
Are there rebates for heat pump water heaters?
Heat pump water heaters no longer qualify for the federal 25C tax credit — that credit ended for installations after December 31, 2025. TECH Clean California funding is exhausted, and HEEHRA's income-qualified, single-family funding is fully reserved statewide as of February 2026 (we can add you to the waitlist and apply it if funds return). We check every rebate and incentive you currently qualify for at your free estimate.
Can you install the same day my water heater fails?
For no-hot-water calls we offer same-day service, 7 days a week — call in the morning and we'll usually have a technician out that day to diagnose it and quote a repair or replacement on the spot.
Do you install both gas and electric water heaters?
Yes — tank, tankless, and heat pump water heaters in both gas and electric configurations, including converting from one fuel type to another where the gas line, venting, or electrical panel supports it.