Professional manufacturer in liquid level sensors and flow sensors.

FSA QC MEDLRG Replacement Part for Ecosmart, Tankless Water Heater Flow Sensor for ECO 18 24 27 1

FSA QC MEDLRG Replacement Part for Ecosmart, Tankless Water Heater Flow Sensor for ECO 18 24 27 2

FSA QC MEDLRG Replacement Part for Ecosmart, Tankless Water Heater Flow Sensor for ECO 18 24 27 3

FSA QC MEDLRG Replacement Part for Ecosmart, Tankless Water Heater Flow Sensor for ECO 18 24 27 4

FSA QC MEDLRG Replacement Part for Ecosmart, Tankless Water Heater Flow Sensor for ECO 18 24 27

Tankless Water Heater Flow Sensor for ECO

Tankless electric water heater flow sensor assembly Flow sensor for Ecosmart electric tankless water heaters Fit models for ECO 18, ECO 24, ECO 27 and ECO 36

FSA QC MEDLRG Replacement Part for Ecosmart, Tankless Water Heater Flow Sensor for ECO 18 24 27

Tankless electric water heater flow sensor assembly
Flow sensor for Ecosmart electric tankless water heaters
Fit models for ECO 18, ECO 24, ECO 27 and ECO 36
For ecosmart tankless water heater element
This tankless electric water heater replacement Part will bring a safe and efficient shower experience to your family
We recommend that the customer keep a FSA QC MEDLRG Replacement Part in case of a fail. This guarantees the hot water service to continue

Brand:

Sanqiaohui

Place of Origin:

GUANGDONG

MOQ:

100

shipping:

SHENZHEN

Customization:

for ECO 18, ECO 24, ECO 27 and ECO 36

Model Number:

ECO18

Brand Name:

Sanqiaohui

Inquiry

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Supply voltage

Output signal

Pulse signal

Housing Material

Plastic

Thread size

3/4,1/2

Pressure

＜1.75MPa

Reliable Performance, Compact Design

Restore consistent hot-water performance and energy efficiency with the FSA QC MEDLRG flow sensor engineered for ECO 18/24/27 tankless units. Compact, precisely shaped housing and OEM-quality components ensure a snug fit and reliable flow readings to prevent unexpected shutdowns. Shipped in protective packaging with a ready-to-install style and durable construction, it minimizes downtime and simplifies maintenance.

Precision Replacement Flow Sensor

This FSA QC MEDLRG replacement flow sensor is engineered for Ecosmart ECO 18/24/27 tankless water heaters, delivering precise flow detection and reliable electrical interfacing for OEM-equivalent performance. It maintains accurate activation and modulation of the heater’s element to preserve consistent temperatures, prevent dry-firing, and reduce energy waste, providing a cost-effective way to restore safety and efficiency. The compact, molded housing with corrosion-resistant materials, sealed fittings, and a plug-and-play connector allows quick installation, long service life, and stable operation under varying water conditions.

Ecosmart Tankless Flow Sensor

The FSA QC MEDLRG replacement flow sensor fits EcoSmart ECO 18, ECO 24, and ECO 27 tankless water heaters to restore accurate water flow detection. Built to OEM specifications, this durable sensor helps maintain reliable heater operation and prevents erratic startups caused by faulty flow readings. Easy to install and cost-effective, it prolongs the performance and service life of compatible EcoSmart units.

◎ Accurate Flow Detection

◎ Durable Construction Materials

◎ Easy Installation Replacement

Accurate Reliable Easy Installation

The FSA QC MEDLRG replacement flow sensor for Ecosmart ECO 18/24/27 tankless water heaters is engineered as an OEM-style component to restore precise flow detection and temperature control, built with durable materials and tight manufacturing tolerances. Its high-sensitivity sensing element and corrosion-resistant construction deliver rapid response, stable operation under variable demand, and extended service life compared with worn originals. With plug-and-play compatibility, straightforward installation, and thorough quality checks, it offers a cost-effective repair that reduces downtime, prevents overheating or false cutouts, and helps maintain the unit’s energy-efficient performance.

Material introduction

The flow sensor features a rugged engineering-grade plastic housing that resists heat and chemical exposure common in tankless water heater systems. Critical internal components are made from corrosion-resistant metals and precision-molded polymer parts to ensure long-term dimensional stability and reliable flow measurement. Durable elastomeric seals and low-friction bearings complete the assembly, providing leak resistance and smooth operation under continuous use.

◎ Product overview

◎ Durable Thermoplastic Housing

◎ Corrosion Resistant Fittings

FAQ

What Ecosmart models does the FSA QC MEDLRG flow sensor replace?

This replacement part is designed to fit Ecosmart ECO 18, ECO 24, and ECO 27 tankless water heaters as a direct replacement for the factory flow sensor. Always confirm your heater model and the part appearance before purchase to ensure compatibility.

How do I know the flow sensor is failing and needs replacement?

Common signs include the heater not firing when water is running, intermittent hot water, fluctuating outlet temperature, or flow-related error messages on the unit. If cleaning the intake/strainer and checking plumbing don’t fix these symptoms, the flow sensor is a likely culprit.

What are the basic steps to install this replacement flow sensor?

Turn off power and water to the unit, remove the cover, disconnect the sensor wiring and plumbing connection (note orientation), remove the old sensor, fit the new sensor with any supplied O-rings or seals, reconnect wiring and plumbing, restore water and power, then run water to purge air and verify operation. If you’re not comfortable working with electrical or plumbing components, hire a qualified technician.

After installing the new sensor, do I need to program or calibrate the heater?

In most cases the flow sensor is plug-and-play and requires no special calibration. After installation, clear any error codes per the heater manual, run a sustained flow to confirm consistent ignition and temperature, and monitor for normal operation. If problems persist, check wiring, connections, and compatibility.

What should I check if installing the new sensor doesn’t resolve the problem?

Re-check electrical connections and proper sensor orientation, inspect plumbing for debris or low supply pressure, verify inlet strainers are clean, and review the heater’s error codes and manual. Other components (temperature sensors, ignition system, or control board) could be at fault—contact technical support or a service technician if needed.

How can I extend the life of the flow sensor and avoid future failures?

Regular maintenance helps: keep an inlet strainer or filter in place, flush the heater to remove scale if you have hard water, consider a water softener where appropriate, inspect O-rings and fittings during service, and avoid freezing conditions. Routine checks reduce debris and scale buildup that commonly cause flow-sensor problems.

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