Code 55 on Your Rinnai Tankless? Here’s What You Need to Know

Hey friends,

If you’ve got a Rinnai tankless water heater, you might’ve seen a Code 55 show up on the display and wondered what it means. The good news is it’s not a breakdown or an error. But it is an important reminder — and one you shouldn’t ignore.

Let me explain.

 What Does Code 55 Mean?

Code 55 on your Rinnai tankless unit simply means it’s time for your annual service. It’s a built-in reminder, not a system failure — but it’s one you want to take seriously.

Just like your vehicle needs oil changes, your tankless water heater needs regular maintenance to keep things running smoothly. Code 55 is Rinnai’s way of saying:
“Hey — I’ve been working hard, and it’s time for a check-up.”

Why Annual Maintenance Matters

Annual service keeps your tankless unit:

• Running efficiently, so you’re not wasting energy or water
• Extending its lifespan, preventing premature breakdowns
• Covered under warranty (yes — service is often required for warranty protection)
• Free from mineral buildup or unnoticed issues

During a service, we don’t just reset the code. We fully inspect, flush, test, and tune up the system to make sure it’s running like new.

 Why Choose Norm’s?

Here at Norm’s Plumbing, Heating & Air Conditioning, we’ve installed and maintained hundreds of Rinnai systems across Nanaimo, Parksville, Ladysmith and beyond.

Here’s why we’re the go-to team for Rinnai service on Vancouver Island:

• Certified gas fitters who know the ins and outs of Rinnai systems
• We follow Rinnai’s official checklist for a complete, professional service
• We offer transparent pricing and honest recommendations
• We’re local and community-driven — no big call centres or wait lists

And of course, we reset the Code 55 properly — after actually doing the service it’s asking for.

When Was Your Last Service?

If it’s been a year or more since your last tankless check-up — or you’ve got a blinking Code 55 on your unit — give us a call.

We’ll get you booked in quickly and make sure your system is running at its best for the year ahead.

Thanks for trusting us with your home comfort,
— Malcolm
Owner, Norm’s Plumbing, Heating & Air Conditioning