The Rinnai Infinity is a popular choice among Wellington homeowners for its energy-efficient, continuous flow hot water capabilities. Known for their compact, wall-mounted design and on-demand heating, these systems are particularly well-suited to New Zealand homes, where sustainability and space efficiency matter.
However, like any advanced appliance, a Rinnai Infinity hot water system requires regular maintenance to perform reliably and safely. This is especially important in Wellington, where coastal air, wind exposure, and fluctuating temperatures can affect long-term performance. Here’s how to maintain your Rinnai Infinity system and get the most out of it year-round.
Understanding Your Rinnai Infinity System
What Makes Rinnai Infinity Unique for Wellington Homes
Rinnai Infinity systems are gas-powered, tankless water heaters that provide hot water only when needed. Unlike traditional storage cylinders, they heat water as it flows through the unit, offering greater energy efficiency and consistent water temperature. This is ideal for Wellington households, particularly in homes with varying hot water usage throughout the day.
With their outdoor installation design, Rinnai units save space indoors and eliminate the risk of stored water cooling. Their digital control panels also allow precise temperature management, which is especially useful in family homes.
How Wellington’s Climate Affects Performance and Maintenance
Wellington’s variable weather conditions, including strong winds, sea spray, and cold winter temperatures, can take a toll on external appliances like the Rinnai Infinity. Systems mounted in exposed locations are particularly vulnerable to moisture ingress, dust accumulation, and frost.
As such, maintenance routines should account for these environmental factors to prevent early wear and maintain peak performance.
Routine Maintenance Tips for Peak Performance
Cleaning the Air Intake Filter and External Components
One of the simplest yet most important tasks is keeping the air intake filter clean. Dust, leaves, and insects can clog the intake, reducing efficiency or triggering error codes. To clean it:
- Turn off the unit and allow it to cool.
- Locate the air intake (usually on the side or bottom of the unit).
- Remove and gently clean the filter using a soft brush or compressed air.
- Reinsert the filter securely.
You should also inspect the exterior of the unit for spider webs, vegetation, or debris that could block vents or affect airflow.
Regular Inspection of Gas Connections and Valves
Gas appliances require special attention to safety. Examine the visible pipework and valves for any signs of corrosion, leakage, or cracking, especially after a harsh winter or stormy period.
If you detect a sulphur smell (like rotten eggs) or hear a hissing sound, turn off the gas supply immediately and contact a certified gasfitter in Wellington.
Even if there are no visible issues, scheduling a visual gas inspection every year is highly recommended.
Flushing the System to Prevent Limescale Buildup
Although Rinnai Infinity systems don’t store water, they’re still susceptible to limescale buildup in the internal heat exchanger, particularly in areas with harder water, which some Wellington suburbs experience. Over time, this scale reduces efficiency and may lead to overheating or system errors.
Flushing the system requires specialised descaling equipment and should be performed by a professional technician. However, if you have the right tools and experience, you can follow Rinnai’s official guidelines to flush the unit safely.
Identifying Early Warning Signs of Issues
Inconsistent Water Temperature or Low Pressure
If your hot water is fluctuating in temperature or pressure, it could indicate a clogged flow sensor, a dirty water filter, or an issue with the incoming gas supply. Wellington’s older pipe infrastructure in some suburbs can exacerbate these issues, causing mineral build-up or pressure fluctuations.
Before calling a professional, check that your controller is set to the correct temperature (typically 50–55°C for domestic use). Also, ensure the water filter isn’t blocked—located near the cold water inlet, it can usually be unscrewed and rinsed clean.
Error Codes on the Controller Panel
Rinnai units are equipped with diagnostic displays that show error codes when something’s wrong. Common codes include:
- Error 11: Ignition failure (check gas supply)
- Error 12: Flame failure (possible wind interference or blockages)
- Error 16: Over-temperature (may indicate scale build-up)
While some minor issues can be resolved with a system reset, persistent or recurring errors should always be addressed by a trained technician.
Seasonal and Annual Maintenance Best Practices
Pre-Winter System Checks in Wellington
Wellington winters can be particularly harsh on outdoor appliances. Before winter arrives, perform a full system check to ensure:
- No visible damage or corrosion
- Gas and water lines are properly insulated
- The unit’s frost protection feature is active
Colder weather increases hot water demand, so it’s important to ensure the system is in optimal working condition before temperatures drop.
Scheduling Annual Professional Servicing
Even if your system appears to be functioning well, professional servicing is key to long-term reliability. During a service, a Rinnai-qualified technician will:
- Test all safety devices
- Check gas pressure and burner condition
- Inspect and clean internal components
- Assess system efficiency
Annual servicing helps catch minor issues early and is often required to maintain warranty coverage.
Long-Term Care for Efficiency and Longevity
Optimal Temperature Settings for Safety and Savings
Running your Rinnai Infinity at unnecessarily high temperatures wastes energy and increases the risk of scalding. A temperature setting of 50–55°C is ideal for most households. If you have children or elderly residents, use a tempering valve or remote controller to fine-tune delivery temperature for safety and comfort.
Protecting Outdoor Units from Wellington’s Coastal Exposure
Salt-laden air and wind-blown debris can accelerate wear on outdoor units. Consider adding a weatherproof housing or wind baffle, especially for systems facing Cook Strait or exposed hilltop areas. These covers should allow full ventilation and be approved by Rinnai to avoid compromising performance or safety.
Ensuring Reliable Hot Water Year-Round in Wellington
Maintaining your Rinnai Infinity hot water system in Wellington doesn’t require expert skills, just consistent attention and a willingness to act on early warning signs.
Clean filters, check gas connections, flush out mineral build-up, and schedule professional servicing annually. By doing so, you’ll enjoy a steady supply of hot water, reduce your energy usage, and extend the lifespan of one of your home’s most valuable systems.
Whether you’re in the city centre or a breezy coastal suburb, these simple steps can help you get the most out of your Rinnai Infinity system all year long.