Skip to main content

JK Plumbing

Facebook Instagram
Call Now

Why Is My Water Heater Not Working in Palo Alto?

When your water heater stops making water it is usually because of a few common problems. These problems include a heating element that has burned out a pilot light that will not stay lit, a high-limit switch that has tripped or sediment that is blocking the burner. The type of water heater you have will help determine which problem is most likely to be the cause.

If you can figure out what is wrong with your water heater you can save a lot of money. For example if you know what is wrong you might only have to pay for a $200 repair or paying for a whole new water heater.

By Alik Yonatanov, Owner & Master Plumber · Last updated 14th August 2026

Why Is My Water Heater Not Making Hot Water?

The answer to this question depends on the type of water heater you have.

If you have a gas tank water heater it will likely stop working because the pilot light will not stay lit or the thermocouple will wear out. The thermocouple is a safety sensor that will turn off the gas when the pilot light goes out. If you try to light the pilot and it will not stay lit the problem is probably the thermocouple.

If you have an electric tank water heater it will stop making water when the heating element burns out or the high-limit switch trips. You can often reset the high-limit switch by pressing a red button. However if the switch trips again the problem is probably the heating element.

Tankless water heaters are a bit more complicated to fix. However some brands like Noritz, Navien and Rinnai will show an error code on the panel that can help you figure out what is wrong.

One thing that affects water heaters in Palo Alto is the water. The water in Palo Alto has a lot of calcium carbonate, which can cause problems for water heaters. This can cause sediment to build up in the heat exchanger and block the burner.

gas water heater repair near me

Gas and Tankless Units: Different Problems, Different Repairs

Homes in Palo Alto have either a gas tank water heater or a tankless system. These two types of water heaters have problems and require different repairs.

If you have a gas tank water heater the common repairs are replacing the thermocouple, replacing the gas valve and fixing the thermostat. These repairs are pretty straightforward if the tank is in condition and not too old.

If you have a water heater the repairs can vary depending on the brand. For example if the heat exchanger gets clogged with sediment you might have to pay $175 to $300 to have it cleaned. If the flow sensor or igniter fails you might have to pay $200 to $400 to have it replaced.

Before you hire someone to fix your gas water heater make sure they have a California license. You can check their license on the California State License Board website.

What to Do When Your Water Heater Stops Working

If your water heater stops working there are things you can do before you call for help:

  • Check to see if the circuit breaker has tripped or if the pilot light is out. If the pilot light is out try to relight it. If you have a water heater check the error code on the front panel. This can help the figure out what is wrong.
  • If there is a leak, turn off the cold water supply to prevent water damage.
  • Do not drain the tank unless there is a lot of water flooding the area.

If you want to get your water heater fixed on the day it is best to call in the morning. This will give you a chance of getting an appointment in the afternoon.

How Much Does Water Heater Repair Cost in Palo Alto?

The cost of fixing a water heater in Palo Alto can vary a lot. For example, replacing the thermocouple or anode rod can cost $150 to $300. Replacing the gas valve or cleaning the heat exchanger can cost $300 to $500.

JK Plumbing charges separately for the diagnostic visit and repair work. The diagnostic fee is credited toward the repair total once the written quote is approved. For anyone evaluating the best water heater repair service in Palo Alto for their situation, the most useful comparison points are the diagnostic fee, how long the quote is honored, and whether the plumber’s license is verifiable.

If the repair estimate is approaching the cost of a new unit, our water heater replacement service can provide an installed replacement quote at the same visit — so you have both numbers before making a decision.

Who Fixes Tankless Water Heaters in Palo Alto?

When homeowners ask who fixes tankless water heaters in Palo Alto, the important distinction is brand familiarity. Tankless units require access to brand-specific diagnostic tools and error code libraries. Not every plumber carries them. JK Plumbing services Navien, Noritz, Rinnai, and Rheem tankless units across the Peninsula, including Midtown, College Terrace, and surrounding communities in Menlo Park, Mountain View, and Los Altos.

For urgent calls, emergency water heater repair in Palo Alto is available Monday through Saturday on a 24-hour basis. A cold shower at 6 a.m. on a Tuesday qualifies — same-day dispatch is standard. Our emergency water heater repair page covers what to do while you wait for a technician and what situations require an immediate versus scheduled visit.

For the full range of repairs — tank, tankless, and heat pump hybrid units — see our water heater repair service page.

emergency water heater repair palo alto

Frequently Asked Questions

Is it worth repairing a water heater or buying new? 

If the unit is under 8 years old and only one component has failed, repair is almost always the better value. If it is within 2–3 years of the end of its expected lifespan and the repair estimate exceeds 40–50% of a new unit’s installed cost, replacement makes more financial sense. Our Palo Alto water heater replacement page walks through the full decision framework, including heat pump upgrade incentives.

How long does a water heater last? 

A gas tank water heater typically lasts 8–12 years. A tankless unit, properly maintained, can reach 15–20 years. In Palo Alto’s moderate-hardness water environment, units that are never flushed or descaled tend to fail at the lower end of those ranges — sometimes significantly earlier.

What are signs my water heater needs repair? 

Inconsistent hot water temperatures, rumbling or popping from the tank, rust-colored water at the hot tap, visible corrosion at fittings or around the base, a pilot that won’t hold, or error codes on a tankless display are all signs the unit needs professional attention before the problem worsens.

Can you fix a leaking water heater? 

It depends on the source. Leaks at the pressure relief valve, drain valve, or inlet and outlet fittings are usually repairable. A leak originating from the tank body itself typically signals internal corrosion — at that stage, replacement is the only reliable fix. Any active leak should be assessed promptly; water damage compounds quickly on interior installations.

How often should a water heater be flushed? 

Tank units should be flushed once a year to clear sediment that reduces efficiency and strains the heating element or burner. Tankless units benefit from heat exchanger descaling every 12–24 months, more frequently in harder-water areas. Our water heater flush service is available across the Peninsula and is one of the simplest ways to extend a unit’s working life.

Visit or Call JK Plumbing

JK Plumbing 1008 Edwards Rd Burlingame, CA 94010 Phone: (415) 359-4588 Hours: Monday–Saturday: Open 24 Hours | Sunday: Closed

Serving Palo Alto and the surrounding Peninsula including Menlo Park, Mountain View, Los Altos, Redwood City, and San Mateo County. 

Schedule a repair or request a same-day quote.

 

RECENT POSTS

All Categories