Choosing the right remote control is just as important as choosing the heater itself. A compatible controller can restore lost functions, improve temperature control, and make daily use much easier.
This roundup focuses on fit, installation type, and practical features so you can narrow down the best option for your tankless water heater without guesswork.
Best 10 Replacement Remote Controls for Tankless Water Heaters Picks for 2026
Noritz Indoor Control
- Easy temperature adjustment
- Maintenance and troubleshooting data
- Temperature lock-out option
Best For: Noritz owners needing an indoor controller with service data
Rheem Digital Control
- Two-degree temperature display
- Water-resistant build
- Connects up to three units
Best For: Rheem tankless gas owners wanting precise digital control
Furrion Wall Controller
- Wall-mounted design
- Black finish
- Simple one-piece controller
Best For: Buyers needing a basic Furrion wall-mounted controller
30009757A NPE Series-2 Controller
- Genuine factory OEM part
- Programmable with backlight
- Compatible with Navien heating systems
Best For: Navien owners wanting an exact-fit OEM remote
Smart Remote App Control
- Smartphone app control for compatible Rinnai heaters
- Tracks energy use, schedules, and system alerts
- Can be placed up to 300 feet away with Wi-Fi signal considerations
Best For: Rinnai owners who want app-based remote control and monitoring
Wireless Recirculation Control
Rinnai Control-R Wireless Demand Kit
- Works with Rinnai tankless water heaters from 2006 onward
- Includes Wi-Fi module plus recirculation components
- Magnetic enclosure supports wall or side mounting
Best For: Compatible Rinnai owners wanting wireless control and recirculation support
Direct Replacement Panel
- Compatible with Girard GSWH-2 and 2GWHAM
- Sold as a user control panel replacement
- No wireless or app features listed
Best For: Girard owners needing a direct replacement control panel
Wired Main Control
RTG20006DW UMC-117 Wired Remote Control
- Wired main remote for residential tankless gas heaters
- 2°F temperature increments with maintenance info access
- Connects up to 3 remote controls on one system
Best For: Compatible residential gas tankless heaters needing a wired main control
Compact 240V Heater
5500W 240V Tankless Water Heater with Control
- On-demand 240V tankless electric heater with digital thermostats
- Compact wall-mount design for small spaces
- Includes dry combustion, low-flow, and overheat protection
Best For: Shoppers wanting a compact hardwired tankless water heater, not just a remote
Heater with Remote
4000W 110V Tankless Water Heater with Remote
- Includes remote control with about 9.8-foot range
- Adjustable 86-131°F temperature with F/C conversion
- Compact wall-mount design for under-sink use
Best For: Small-space buyers wanting a heater that already includes a remote control
Noritz Indoor Control – RC-7651M Remote Controller
If you’re comparing replacement remote controls for tankless water heaters, the Noritz RC-7651M is a straightforward option for compatible Noritz indoor systems. It is designed for easy temperature adjustment and also gives access to maintenance and troubleshooting data, which can be useful when you want more than basic on/off control.
Best For: Noritz owners who want an indoor controller with temperature lock-out and service data access.
Pros:
- Allows easy temperature adjustment
- Provides maintenance and troubleshooting data
- Includes a temperature lock-out option
- Designed for indoor applications
Cons:
- Supports only one device
- Indoor use only
- Not a universal replacement controller
Overall, this is a purpose-built controller for Noritz systems rather than a general replacement remote. If your setup matches, it offers practical control plus useful service information in one compact unit.
Rheem Digital Control – RTG20006DW Main Control
For shoppers looking at replacement remote controls for tankless water heaters, the Rheem RTG20006DW is aimed at compatible Rheem tankless gas models, including mid and high efficiency units. It provides precise temperature control with a display that reads in two-degree increments, which makes small adjustments easier to manage.
Best For: Rheem tankless gas water heater owners who want precise digital temperature control.
Pros:
- Compatible with multiple Rheem tankless water heater models
- Displays temperature in two-degree increments
- Rugged, water-resistant design
- Can connect up to three units simultaneously
Cons:
- Made specifically for Rheem systems
- Battery-powered controller with no batteries included
- Not a universal remote
This is a strong fit if you need a Rheem-specific controller with clearer temperature feedback and the option to manage multiple units. Its water-resistant build also makes it a practical choice for more demanding installations.
Furrion Wall Controller – Water Heater Wall Controller
When browsing replacement remote controls for tankless water heaters, the Furrion wall controller stands out as a simple wall-mounted component for water heater setups. The supplied details are limited, but it is clearly described as a water heater component with a wall mount design and a black finish.
Best For: Buyers who need a basic wall-mounted Furrion water heater controller.
Pros:
- Wall-mounted design
- Listed specifically as a water heater component
- Black color for a clean installation look
- Simple one-piece unit
Cons:
- Limited feature details provided
- No compatibility list included in the notes
- Not described as a multi-function remote
Because the product information is sparse, this is best treated as a fit-first option for Furrion setups where you already know compatibility. The main appeal is its straightforward wall controller form factor.
Among replacement remote controls for tankless water heaters, the Navien 30009757A is positioned as a genuine factory OEM repair part for compatible Navien heating systems. It includes a programmable interface, backlight, and remote control method, making it a more feature-rich choice for homeowners who want exact-fit management.
Best For: Navien owners looking for a genuine OEM remote with programmable control.
Pros:
- Genuine factory OEM repair part
- Compatible with Navien heating systems
- Programmable with backlight
- Remote control method for convenient operation
Cons:
- Designed specifically for Navien systems
- Listed for boiler use, not universal water heaters
- Compatibility depends on the correct NPE Series-2 setup
This controller makes sense if you want an OEM replacement rather than a generic accessory. Its programming features and backlit display add convenience, but it is clearly a specialized part for the right Navien system.
Smart Remote App Control – Rinnai WiFi Control Module
If you want replacement remote controls for tankless water heaters that add app-based convenience, this Rinnai WiFi Control Module is built for compatible Rinnai systems. It lets you adjust temperature, monitor performance, and manage schedules from your smartphone through the Control-R app.
Best For: Rinnai owners who want wireless phone control, alerts, and scheduling without standing at the unit.
Pros:
- Wireless smartphone control for temperature adjustments and monitoring
- Supports schedule setting, energy-use tracking, and system alerts
- Simple two-wire interface for compatible Rinnai tankless water heaters
- Can be installed up to 300 feet away when Wi-Fi signal is weak
Cons:
- Only works with specifically equipped Rinnai tankless water heaters
- Designed for indoor installation, even though it can work with outdoor heaters
This is a strong choice if your priority is remote management rather than a basic wall control. The feature set is focused on convenience and monitoring, but compatibility is the key check before buying.
Wireless Recirculation Control – Rinnai Control-R Wireless Demand Kit
Rinnai - RWMKT03 - Control-R Wireless Demand Recirculation Kit (Push Button+Temp Sensor)
Check Price On AmazonAmong replacement remote controls for tankless water heaters, this Rinnai Control-R Wireless Demand Recirculation Kit stands out for users who want wireless control plus recirculation-related functionality. It is designed for Rinnai tankless water heaters from 2006 onward, with mounting options that make it easier to place the control where it works best.
Best For: Rinnai owners with compatible 2006+ units who want a wireless control kit with flexible mounting.
Pros:
- Compatible with Rinnai tankless water heaters from 2006 onward
- Includes a Control-R Wi-Fi module and demand recirculation components
- Magnetic enclosure allows indoor side-of-unit placement or wall mounting
- Includes wall hardware and installation manual
Cons:
- Not compatible with RH180 Hybrid models
- LC alert is not shown for certain pre-2009 series
- Pairs with a single tankless water heater only
This kit is a practical fit if you need a wireless Rinnai control solution and want flexible installation options. Just make sure your heater model falls within the supported range before ordering.
Direct Replacement Panel – Girard GSWH-2 Control Panel
Tankless Water Heater Control Panel Compatible with Girard/Lippert 2022107563-2GWH9
Check Price On AmazonIf you’re comparing replacement remote controls for tankless water heaters and need a unit-specific panel, this Girard/Lippert control panel is aimed at GSWH-2 compatibility. It’s a straightforward controller for matching Girard tankless water heater systems and is described as a user control panel replacement.
Best For: Girard GSWH-2 owners looking for a compatible replacement user control panel.
Pros:
- Compatible with Girard tankless water heater GSWH-2 and 2GWHAM
- Designed as a direct user control panel replacement
- Simple one-unit replacement format
Cons:
- Compatibility is limited to specific Girard/Lippert models
- No app, wireless, or advanced remote features are listed
This is the most model-specific option in the group, so it makes sense when you need a direct panel match rather than a feature-rich control upgrade. Verify your heater model carefully before choosing it.
Wired Main Control – RTG20006DW UMC-117 Wired Remote Control
If you need replacement remote controls for tankless water heaters, this wired main remote is built for model-specific residential gas systems. It offers easy temperature adjustment, maintenance information access, and precise 2°F control, but you should verify fit using your heater’s serial number before buying.
Best For: Homeowners replacing a compatible wired main control on a residential tankless gas water heater.
Pros:
- Allows easy temperature adjustment and maintenance information access
- Supports up to 3 remote controls on one tankless system
- Precise 2°F temperature increments
- Water resistant for indoor use
Cons:
- Must be matched to the correct model using the serial number
- Maximum temperature is limited to 140°F
- Water resistant, but not waterproof
This is a practical replacement if you already know the control is compatible with your unit and want straightforward wired operation. The biggest advantage is its model-specific fit, so confirmation before purchase is essential.
Compact 240V Heater – 5500W 240V Tankless Water Heater with Control
Despite the keyword focus on replacement remote controls for tankless water heaters, this product is an entire 240V tankless water heater with remote-control-related temperature management features. It is a wall-mount unit for tight spaces and delivers on-demand hot water with digital thermostat control, but it must be hardwired and installed with proper electrical support.
Best For: Buyers looking for a compact 240V tankless electric water heater with digital temperature control.
Pros:
- Heats on demand with no storage tank
- Compact wall-mount design for tight spaces
- Digital thermostats maintain consistent output temperature
- Includes protections like dry combustion, low flow, and overheat protection
Cons:
- Not a standalone replacement remote control
- Requires hardwiring and a 40AMP+ breaker
- Installation calls for electrical expertise
This is a useful option only if you actually need the heater itself rather than a remote replacement. Its strength is efficient, compact, temperature-stable operation, but the installation requirements are not casual plug-and-play.
Heater with Remote – 4000W 110V Tankless Water Heater with Remote
For buyers comparing replacement remote controls for tankless water heaters, this model stands out because it includes a remote control and adjustable onboard settings. It supports 86-131°F adjustment, Fahrenheit/Celsius conversion, and a 9.8-foot remote range, making it a compact choice for small-space installations.
Best For: Small-space installs where a tankless electric heater with included remote control is desired.
Pros:
- Includes a remote control with about 9.8-foot range
- Adjustable temperature from 86-131°F
- Can convert the display between Fahrenheit and Celsius
- Compact wall-mount design for under-sink spaces
Cons:
- This is a full water heater, not a replacement remote only
- Requires specific wiring and installation setup
- Remote range is limited to a short distance
This unit makes sense if you want an integrated heater-and-remote package rather than just a spare control. Its flexibility is good for compact spaces, but you still need to plan for the wiring and installation requirements.
How We Picked These Replacement Remote Controls for Tankless Water Heaters
We focused on compatibility first, since the wrong controller can fail to communicate with the heater or limit available settings. We also looked at installation style, display clarity, temperature control, smart features, and whether the part is a true OEM-style replacement or a broader compatible option.
Quick Comparison
For most buyers, the biggest decision is between a direct replacement remote, a brand-specific smart controller, and a compatible universal-style panel. Direct replacements are the safest choice for restoring original functions. Smart modules are best when app control or scheduling matters. Compatible panels can be useful, but only if the model and wiring match exactly.
Key Buying Factors for Replacement Remote Controls for Tankless Water Heaters
Model Compatibility
Check the exact heater model number, series, and voltage requirements before buying. Even within the same brand, controllers may not be interchangeable.
Wired, Wireless, or App-Based Control
Wired controllers are common and reliable. Wireless and WiFi options add convenience, but they may require specific installation conditions or only work with certain systems.
Temperature and Function Controls
Some remotes only adjust temperature, while others also handle recirculation, diagnostics, or operating modes. Make sure the controller matches the features you actually need.
Installation and Mounting
Look at cable length, wall-mount design, and indoor versus outdoor use. A replacement remote should fit your setup cleanly without improvising connections.
OEM Versus Compatible Parts
OEM and factory-equivalent parts usually provide the most predictable results. Compatible alternatives can save money, but they require extra attention to part numbers and connector style.
Who Should Buy Which Replacement Remote Controls for Tankless Water Heaters?
If you want the lowest-risk option, choose a direct OEM replacement that matches your heater brand and part number. If you want more convenience and remote access, a WiFi or smart control module makes sense for supported systems. If you are replacing a damaged panel on a less common unit, a compatible control may work well, provided the specifications line up exactly. For homeowners who simply want reliable hot water control again, prioritizing compatibility over extra features is the smartest move.
