The first step in fixing this problem is to inspect all of the vent pipes and make sure that they are properly connected without any holes or gaps. Many point-of-use water heaters can also be used as a booster to your main tankless. 37 Industry Classes. Then, tighten up the nut to secure the flow sensor. In order to protect a tankless from freezing, it's important to make sure the unit is supplied with gas and electricity to help activate the built-in freeze protection. These Navien flow sensor problems are widespread among Navien's latest models of tankless water heaters. Get genuine Navien factory OEM Sensors for your Navien tankless water heater. Many say that every good thing has its downsides.
154 Indoor-Air Quality. They come in either tank or tankless water heater styles, and are particularly helpful when hot water is needed in a remote area. If it gets damaged, replace it with a new one. They should be flushed regularly and a few other preventative tasks need to be completed. Gems' FS-380P Series Inline Plastic Flow Switch is an excellent choice with on-demand hot water heaters to help provide an endless supply of hot water. We have developed a simple Bypass system so that the Flow Monitor can be used in pipes up to 2 1/2". Use a screwdriver to lift up the tiny pin from the top of the flow sensor.
Apart from cleaning the flow sensor, reinstalling it is also highly suggested to correct the error code. Always eliminate the easy fixes first, such as the natural gas being turned off or an empty propane tank. In order to do this, follow the below step-by-step procedure: To begin with, turn the water going to the unit off. Locate the thermal safety reset buttons. However, in keeping with the spirit of actual definitions, a tankless water heater would be defined as: - noun. Since Navien water heaters are the first to feature a condensing tech, these units are prone to several common issues, including the Navien problems flow sensor o ring. The flow of water has been reduced because of an obstruction in the plumbing or the water filter. Replacing the flow sensor on Stiebel Eltron is not rocket science. Depending on the heating capacity of the elements, and how many of them, the water will enter through the inlet side of the heater at one temperature, pass through the heat exchanger and exit through the outlet side of the heater at a higher temperature achieving a specific "temperature differential" commonly know as "Delta T" (ΔT) in scientific terminology, specifically chemistry. This is a genuine OEM item made by Noritz. Plumbing Solder Kit, 1/4Lb Lead Free Solder, Flux Paste, 2Yd Abrasive and Brush. In some cases these sensors are magnetic in others they are centrifugal and in others they are rotary or fan based.
You should also check if the gas line has been sized properly, it may be too small. Product ID • EKK3D0000000. Turn off the cold water supply to your tankless water heater. See our product specification sheet. How To Replace Flow Sensor On Stiebel Eltron Tankless Water Heater? In Stock FREE SHIPPING. 7K Domestic Hot Water. If you're hot water is cold, there's a good chance that the burner did not ignite.
Pilot Assembly or Burners Require Cleaning - The problem could be a build-up of dust or dirt that's preventing the pilot assembly to activate or the burners to ignite. 07 GPM, signaling the burner to energize at even the lowest demand for hot water. Remove the circuit breaker locks and turn on all the circuit breakers connected to the water heater. A flow switch is used to detect the presence of water flow and turns on the system to heat the water. The further the hot water needs to travel, the more noticeable the cold-water gap will be. Flowmeter adaptor/bell coupling available upon request at no additional charge. Carlin 4020002S Oil Primary Control w/ Interrupted Duty Ignition, 15-Second Trial for Ignition. For all intents and purposes, all of the water flow that goes through a tankless water heater actually flows through the heat exchanger. Each home in my new (<5 years old) subdivision has (or originally had) a Rheem RTGH natural gas-fired tankless water heater. Open all of the hot water taps. And this guide on Stiebel Eltron Flow Sensor Troubleshooting will disclose everything behind this issue. This can make a huge difference since it will help prevent limescale from forming in the first place. Solution: FS-380P Inline Plastic Flow Switch.
When the second person turns the water on, the water is warm, but then turns cold before the tankless kicks in and delivers hot water again. It's not uncommon for a single-lever mixing valve to fail and cause a crossover issue. Efficient tankless water heaters) and by your plumbing layout (dedicated return line or dead end. Venting Obstruction. This rugged industrial switch is an economical alternative to metal flow switches. When the flow sensor becomes clogged, it doesn't sense the presence of water flow. Below are a few of the common issues, but there are many others that can cause this problem. Now, take a pencil with eraser (if you don't have an insulated tool) and press those two reset buttons. This filter is beneficial for collecting any debris and avoiding its impairment. To get this issue fixed when you need hot water, try to unplug the device for 30 seconds, and plug the system back in. When you need to troubleshoot your tankless water heater you probably feel overwhelmed.
The Flow Monitor was designed to only work with our systems. That's the flow rate when a drip becomes a stream of water. The pressure pump creates pressure for the shower when water flow is sensed, which helps conserve water. Even with no demand for hot water, the burner will energize to maintain the proper water temperature. A tankless water heater with two 6000 Watt (6 Kilowatt) heating elements would be rated at 12, 000 Watts or more commonly 12 (kilo) watts. Genuine Factory OEM repair part. My plumber explained that it is because the sensor is triggered only with a certain water flow.