It’s more than “flush and go.” Here’s what I check:
1. Flush the Heat Exchanger
I hook up hoses and run a descaling solution (usually food-grade vinegar or a special chemical) through the system for 45–60 minutes.
Why?
To remove calcium and lime scale from the heating elements.
This improves efficiency and prevents overheating or error codes.
2. Clean the Inlet Filter
Your tankless heater has a small mesh screen where water enters the system.
I pull it out, clean it, and reinstall.
You’d be shocked how many service calls I get where this filter is the entire issue.
3. Check Burner Performance (Gas Units)
For gas models, I inspect:
- Flame quality
- Burner condition
- Ignitor and flame sensor cleanliness
- Proper gas pressure
This helps catch small issues before they cause shutdowns or dangerous conditions.
4. Inspect Venting and Air Intake
Vent blockages, insects, or debris can choke the system.
I check the intake and exhaust for:
- Blockage
- Rust
- Loose seals
- Proper slope and clearance
5. Look for Leaks, Corrosion, or Loose Fittings
I inspect the entire unit for:
- Early signs of internal leaking
- Signs of stress at the joints
- Aging gaskets or seals
6. Review Error Code History (If Available)
Many modern units store diagnostic history.
I check the log to see if there have been recent flame failures, overheating, flow errors — even if they haven’t caused shutdowns yet.
Bonus: I Educate You as We Go
You’ll never hear “all good” and then get handed a bill.
I walk you through:
- What I did
- What I found
- What to keep an eye on
- And what’s worth fixing vs. waiting on
That way, you’re not just maintaining your unit — you’re learning how to spot issues early.
What We Do at Golden Valley Plumbing
When you book tankless maintenance with us, you get:
- Full flush + descaling
- Filter and sensor cleaning
- Gas + vent inspection
- Honest answers and clear pricing
- Fast, clean, respectful service
Haven’t had your unit checked in a while? Schedule a service with Golden Valley Plumbing — and keep your system running like new.
Final Word
Tankless water heaters don’t “just work forever.”
They work well because they’re maintained.
And a one-hour visit once a year can save you from a $3,000 replacement.
If you’re not sure when yours was last serviced — it’s probably time.
