Testing before replacing parts
A thermostat, an element, a thermocouple, a gas valve and a failed igniter all look identical from the shower. Each one is checked so the part that gets replaced is the part that failed.
Water Heater Repair and Service
No hot water, water that runs lukewarm, or a tank that rumbles and drips. San Marcos Emergency Plumber works on tank and tankless units, tests the fault and tells you honestly whether repairing it still makes sense.
- 24/7 Emergency Service
- Upfront Quotes
- Same-Day Availability
Signs That Need Attention
- Hot water that runs out far sooner than it used to
- A rumbling or popping noise from the tank while it heats
- Rusty or cloudy hot water at every tap
- Water pooling around the base of the tank or at the pan
- A tankless unit shutting down and showing an error code
Local water is very hard, so sediment builds in the bottom of a tank and scale forms on a tankless heat exchanger faster here than in softer-water parts of the country. That rumble is water boiling under a sediment layer, and it is usually the first sign a tank is working harder than it should.
What the Service Includes
Not every visit needs every item below. San Marcos Emergency Plumber separates the repair you called about from anything optional, and the quote shows both.
Flushing and descaling
Tanks are drained and flushed to clear sediment; tankless units are descaled through their service valves. On hard water this is the single most useful thing you can do for heater life.
Safe handling of gas and venting
Gas connections, combustion air and flue draft are checked on every gas unit. If something is unsafe, you are told before it is put back in service, not after.
Your Options
Repair makes sense when the tank itself is sound and one component has failed. Replacement enters the conversation when the tank is leaking from the body, when the unit is well past its expected life, or when the repair cost keeps climbing on a heater that is already struggling.
The full comparison is on our water heater repair versus replacement page, including the questions worth asking at the inspection. Newer homes in Kyle and the growth areas south of town often have tankless units in the garage, which fail differently from a traditional tank and are usually cheaper to keep running if they are descaled on schedule.
If there is water on the floor, find out whether it is the tank or a supply line first — leak detection answers that quickly. Our guide to no hot water covers the safe checks you can make yourself.
Water Heater Repair Questions
What affects the cost of a water heater repair?
The fault, the fuel type and the unit. A thermocouple or element is a small job; a gas valve or a tankless control board is not. San Marcos Emergency Plumber diagnoses first and gives you the repair price and the replacement price together.
Should I repair or replace my water heater?
If the tank shell is leaking, replacement is the only real option. If a component failed on an otherwise sound unit, repair is usually the better value. Our comparison page walks through each case.
Is it safe to relight the pilot myself?
Only follow the instructions printed on the unit, and only if you smell no gas. If there is any gas odour, leave the building first and call from outside. San Marcos Emergency Plumber would rather come out for nothing than have you troubleshoot a gas appliance.
Does hard water really shorten heater life here?
Yes. Edwards Aquifer water carries a lot of dissolved mineral, which drops out as sediment in a tank and as scale in a tankless exchanger. Regular flushing is the difference between a heater that lasts and one that fails early. See the full service list for maintenance options.
Arrange water heater repair and service in San Marcos
Describe what is happening and we will plan the visit around it.