Tankless Water Heater Flow Sensor

9 years on the tankless water heater and loving it which is also about the length of time these to parts will last.

Tankless water heater flow sensor.

If you have an older tankless water heater 10 years old the problem is most likely that the minimum flow rate is too high. My research suggests this sensor is the same sensor used in a jacuzzi tankless water heater model j s199w which may require a change of dip switch settings. You see every tankless water heater has a minimum flow rate which is the minimum amount of water measured in gallons that the tankless unit needs flowing through it every minute gpm to produce hot water. Other than cleaning flushing descaling a tankless water heater the flow sensor and flame rod assembly are the first parts that will go bad.

If the flow rate falls below these levels the energy efficient rinnai unit will turn off because it senses that hot water isn t needed. Rinnai tankless gas water heaters need a demand of at least 0 4 to 0 6 gallons per minute of water flow through the hot side to ignite and 0 26 gallons per minute to stay in operation. The flow sensors are near the pipe where the water flows and these detect when the water enters the system. This sensor monitors the presence of water flow while two other sensors measure the incoming and outgoing water temperature.

9 years on the tankless water heater and loving it which is also about the length of time these to parts will last. A repairman removed the 1st sensor and told me the impeller turbine would not spin. But i don t know how much force it takes to make it spin. If your tankless water heater isn t producing the level of water pressure that you expect there s a number of different issues that could be responsible.

Navien tankless water heater problems are sometimes hard to comprehend not to mention fix the heater on your own. A flow switch is used to detect the presence of water flow and turns on the system to heat the water. The key to providing hot water at low flow rates with tankless water heaters is to match the combination of flow rate and temperature rise to fall within the range of the water heater s capacity. I bought both as spares so that when i need them i will have them to get my unit up and running again.

Whenever there is a hot water demand a reed sensor within the tankless water heater identifies the demand and initiates the heating process. The flow sensors are one of the most basic and essential elements in a tankless water heater and are perhaps the only things that help with energy efficiency. The other way is to have some amount of stored hot water generally called a tank that can be used to accomodate low flow rates as well as provide for some amount of peaking capacity which depends on the stored volume. If you have no ideas on how to clean the venturi or fix the flow sensor you should call the technical support for help.

Flow sensor issue the flow sensor signals the tankless to activate. I find that to be the case with the 2nd sensor.