Electric Water Heater Repair

Electric water heaters break down differently than gas ones, and in San Antonio specifically, the water itself is working against your heating elements every single day. Here’s a real breakdown of what goes wrong, why, and what it takes to fix each one.

No Hot Water At All

Most electric tanks have two heating elements, an upper and a lower. The upper one heats the top of the tank first, so when it fails completely, you get flat out cold water, nothing. This is almost always the upper element burning out, either from age or, especially here in San Antonio, from mineral scale coating it so thick it can’t transfer heat anymore and eventually cracks. We test with a multimeter right at the panel, takes about five minutes to confirm.

How we fix it: Swap the upper element and check the thermostat at the same time since they’re right next to each other. Parts and labor typically $150 to $250. If the tank is heavily scaled, we’ll flush it same visit so the new element doesn’t fail early too.

Hot Water Runs Out Fast

If you get a few minutes of decent hot water then it turns lukewarm, the upper element is doing its job but the lower one has quit. This is the classic San Antonio hard water failure pattern, the lower element sits at the bottom of the tank where sediment collects thickest, so it fails first and it fails faster than almost anywhere else we service in Texas.

How we fix it: Replace the lower element, flush the tank to clear sediment, and if it’s been more than a year since the last flush, we’ll walk you through setting up a maintenance schedule so this doesn’t repeat every twelve months. Cost typically $150 to $250.

Water Is Too Hot or Scalds

This one’s almost always the thermostat sticking or reading wrong, not the element. A stuck thermostat can let the tank keep heating well past its set point. It’s a quick fix but not one to ignore, scalding water is a real safety risk especially in homes with kids or elderly family members.

How we fix it: Replace the faulty thermostat and confirm the temperature setting is safe, generally 120 degrees is the recommended max. Runs about $130 to $200.

Breaker Keeps Tripping

Your breaker trips for a reason, it’s not being dramatic. Almost always this means an element has developed a short, pulling more current than it should. We’ve had folks reset that breaker five or six times before calling us, and every time, the short gets worse. Please don’t keep resetting it, that’s how wiring gets damaged.

How we fix it: Test both elements and the wiring at the panel, replace whichever element shorted. Typically $150 to $250, though if wiring got damaged from repeated trips we’ll flag that separately.

Quick note for our San Antonio customers specifically: because your elements sit directly in the water, they take the hard water hit worse than a gas burner ever would. If you’re on your second or third element replacement in under five years, that’s your tank telling you it’s close to the end, not a fluke.