Why does my flammable vapor sensor keep tripping?

Causes of tripped TCO are dirty combustion parts, clogged vent… these things cause overheated combustion chamber. Thermal cutoff trips when combustion chamber get too hot. Prevents overheating and is part of the FV system: Push inward to reset, or replace part as needed.

What is a flammable vapor sensor on a water heater?

What is a Flammable Vapor (FV) Sensor? FV Sensors are safety devices on select models of water heaters, which cause a soft lockout (a.k.a. the unit shuts down) when flammable vapors are detected near the unit, to prevent the possibility of their ignition.

How do you bypass a flame sensor on a water heater?

Actually, you can bypass the flame sensor. the flame sensor is just a way of exposing the voltage on the flame sensor wire to the furnace burner flames. So you can connect the flame sensor wire to a screwdriver and put the screwdriver into the flames.

How do flammable vapor sensors work?

The carbon, which acts as a conductor, is dispersed throughout the silicone such that, in the absence of gasoline vapor, the carbon particles are in solid electrical contact. When the silicone encounters gasoline vapor, it ex- pands, pulling some of the carbon particles apart, increasing the resistance of the sensor.

How to reset flammable vapor sensor on water heater?

Reset the control by unplugging the blower, leave unplugged for at least 5 seconds. 2. plug back in and within 30 seconds cycle temp control from hot to low 6 times. Robertshaw Gas Valve: 1. Turn the manual lever on the Control Gas Valve counter clockwise until it snaps to the “on” position.

Where is the vapor sensor on a Rheem water heater?

Johnson also serves as the de facto computer repair person for his family, friends and coworkers. Certain Rheem water gas water heater models feature electronic controls with a flammable vapor sensor installed on the bottom portion of the water heater unit.

Are there any downsides to a flammable vapor sensor?

The downside of the sensor is that it can be trigger by other fumes in the vicinity such as paint fumes. Check to make sure that you don’t have a gas leak.

How does the FVS work in a hot water tank?

The FVS is a relatively newer’ish invention that consists of a silicone type sensor that detects flammable vapors outside of the hot water tank. If you have a gas leak, you certainly don’t want to have an open flame feeding off that fuel.

The downside of the sensor is that it can be trigger by other fumes in the vicinity such as paint fumes. Check to make sure that you don’t have a gas leak.

Where is the FV sensor on my hot water tank?

Please ensure your basement/mechanical room is well ventilated during this process. Use at own risk. -Locate the FV sensor at the bottom of the tank located inside grey plastic clip box. -Turn power off to hot water tank.