Tankless Water Heater Repair Near Brea, California
Tankless Water Heater Repair Near Brea, California
Get your endless hot water… endlessly again.
Tankless water heaters are great, but they’re more sensitive than standard tanks — low flow, scale, bad venting, or a dirty inlet screen can all trigger error codes and shut the heater down. Our plumbers walk through the whole system (gas, water, venting, and the unit itself) to find what’s actually causing the problem and fix it.
We repair many tankless issues same day, depending on the brand and parts.
Common Tankless Water Heater Problems We Fix
- Error codes / flashing codes on the display
- Hot water cuts in and out during a shower
- No hot water anywhere in the house
- Unit won’t fire / ignition failure
- Low flow / minimum flow not met
- Sooting or venting-related shutdowns
- Descaling / flushing needed because of hard water
- Temperature fluctuates when multiple fixtures are on
If we find the unit is undersized for the home, we can recommend fixes (recirc, larger unit, or install changes).
Signs Your Tankless Water Heater Needs Service
- You’re getting error codes more often
- You hear the unit trying to fire but it shuts down
- Hot water is fine on one faucet but not the whole house
- It only fails when you run two fixtures at once
- You haven’t flushed / descaled the unit in over a year
- You recently had work done on gas, water, or venting
- You’re on hard water and don’t have a softener
Tankless units need maintenance — skipping it can look like a “broken” unit when it just needs cleaning.
Our Tankless Repair Process
- Confirm model, fuel, and installation location
- Pull or read active error codes
- Check gas supply, venting, and condensate
- Inspect water inlet screen / filters
- Test flow and temperature rise
- Perform descale / flush if needed
- Repair/replace failed components (ignition, sensors, valves, etc.)
- Test hot water at fixtures and explain what we found
You’ll know what failed, why it happened, and how to prevent it.
When Repair Isn’t the Best Option
We’ll always try to repair first. But replacement may be smarter when:
- The unit is 12–15+ years old
- It was installed undersized for the home
- Parts are no longer supported
- There’s repeated scale-related failure
- You want to upgrade to a higher-GPM or recirc-ready model
We can quote tankless replacement or even switching back to a high-recovery tank if that fits your home better.
Tankless Flushing & Descaling
Orange County’s harder water can cause mineral buildup inside tankless heat exchangers. That buildup:
- Triggers error codes
- Reduces hot water output
- Makes your tankless run louder
- Shortens the lifespan of the unit
We can flush and descale the heater and recommend a yearly maintenance schedule (or more often if you don’t have a softener).
Ready to Schedule Tankless Water Heater Repair?
Call (657) 669-0259 or request service online. We’ll confirm you’re in the Brea / Orange County area and send a Service Lion tankless tech to get your hot water working again.
Tankless Water Heater Offers & Services
Related Plumbing Services
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Tankless Water Heater Repair FAQs
Why does my tankless keep shutting off mid-shower?
Most of the time it’s flow-related (not enough water flow to keep the burner on) or scale that’s restricting the heat exchanger. We can diagnose both.
Do tankless water heaters really need yearly maintenance?
Yes. Manufacturers recommend routine flushing/descaling — especially in hard-water areas — to keep performance up and prevent error codes.
Can you fix any brand of tankless?
We service most major brands installed in Southern California homes. Tell us the brand/model when you call so we can come prepared.
My tankless is giving an error code — do I need to replace it?
Not necessarily. Many error codes are solvable with cleaning, sensor replacement, or fixing gas/venting/water flow.
Can you add recirculation for faster hot water?
In many cases, yes — either through the tankless (if it supports recirc) or via an add-on. We can tell you what’s possible after we see your setup.
