Remove the sensor from the base ring of the water heater and disconnect the two wires to the sensor with a multimeter. 2. Measure the resistance between the FV sensor’s two wiring terminals and record the result.
How many ohms should a flammable vapor sensor have?
In the absence of vapors, the resistance should be between 7k and 25k Ohm after cooling. Under 45k Ohm readings may cause it to reset, but it will almost certainly trip again.
How does a flame vapor sensor work?
Because of the dispersion of carbon in the silicone, when gasoline vapor is not present the carbon particles are in solid electrical contact. This increases the sensor’s resistance when the silicone ex- pands and pulls apart some of the carbon particles.
How do you reset the flammable vapor sensor on Rheem?
Switch the gas valve switch on the water heater to “ON” after a few seconds of waiting in the “OFF” position.
What causes a flammable vapor sensor to go bad?
When exposed to ammonia or sewer gas, FV sensors will go off. Pet accidents near heaters, bleach mopping of the floor, or storing paint cans nearby may cause an FV Sensor lockout, but it’s not uncommon.
Are flammable vapor sensors interchangeable?
Even though a flammable-vapor sensor from one manufacturer may work with another brand of tank, I doubt that every sensor from every manufacturer will be compatible with every other brand of tank.
How do I know if my water heater is FVIR?
In case a flammable vapor outside the water heater is ignited, a sensor inside the water heater will detect it and shut off the gas flow for burner and pilot light. When is my water heater going to be FVIR? FVIR models will be identified by a label specific to the manufacturer.