Rheem SP20172 Flammable Vapor FV Sensor Kit White, 6.7X2.7X9.4 inches

Works in my A.O. Smith. Buy it!
Works in my A.O. Smith water heater with no problem. Great value. Didn’t need housing provided with sensor as it is different for A.O. Smith. Used existing. You’ll need to reset hot water heater after installing new sensor or you’ll still be in lockout mode. Works great after reset. See YouTube videos for help.

Works great!
Our water heater has been running great since this was installed. It seems like it solved the problem of the flammable vapor sensor code.

Does what it’s supposed to, have to have it so this is a good one to buy.
Fixed our issue, easy enough repair after Google searches. We are finishing our basement and have painted trim work. The sprayed enamel paint tripped the Flammable Vapor Sensor on our AO Smith water heater. No reset methodology would work (I even pulled the sensor and moved it do a different part of the house overnight). Ordered this replacement part on a Saturday and had it Monday before noon. Part did what it was supposed to, water heater is up and running again. It’s an easy replacement and certainly a do it yourself vs. calling a repair person who will likely charge you $150 just for showing up on a $25 part.The downside of these are – you need the one you need, there aren’t really “options”. If yours dies you need a new one. They’re finicky, as I said mine wouldn’t reset and I read a lot of people having issues with these and their durability / reliability. It’s almost worth having a spare on hand (though if you google right you can find some temporary bypass solutions). $23 is the cheapest I could find this part which is really probably a $3 resistor at best. Crazy price for a cheap part, but it is what it is and this one does the job. Certainly don’t need to pay $50-$70 for other versions of this.

Amazon to the rescue. Hot water has been restored.
Let me start by saying “IT WORKED”!! This is important because at 11pm on a Thursday (before Memorial Day no less) my daughter discovered the hot water heater had quit working the hard way. She had to rinse off in ice cold tap water. I diagnosed the problem and had the part on order through Amazon by midnight for expedited delivery on Saturday. Friday, with no hot water was not great for the whole family. Saturday, the part arrived, I installed it and viola! Hot Water.My Richmond water heater, only about 3 years old, was indicating a FVS Lockout on the Honeywell Controller. FVS is the Flammable Vapor Sensor, something common to pilotless models to make sure there are no leaks before igniting. That is a good thing when it functions right. Its also a good thing when it fails that it prevents operation. Well, except for the cold showers, its a good thing.This set comes with the housing around the actual sensor. Why, because you can remove the old housing from the water heater itself, but the way the FVS installs in the housing you would destroy the housing removing the defective FVS. So the housing is there for a reason. The same thing for the tie wrap. You’ll need to remove your wiring harness from the control unit, then carefully use pliers to pull the wire connectors from the defective FVS. I installed the harness first because I wanted to be careful to connect to the right terminals. I don’t know that it matters, but I did not want to take a chance (two days without hot water if you recall). I carefully feed the harness through the housing and easily snapped the FVS in place. The chamfer on the edge of the FVS should allow easy insertion, but the blade (terminal) side goes into the housing FIRST. The part numbers were not an exact match, but cross checking indicated this to be a new replacement for my defective one. Hopefully the part number difference indicates a new and improved part. These things seem to have reliability issues. I guess over three years to savings in natural gas was worth it.Finally, I checked Amazon for this part in desperation. No one locally had it in stock. I could order the it might arrive the Tuesday or Wednesday after Memorial Day, leaving us without hot water for nearly a week. Thankfully Amazon exists and has priority shipping. No matter what a certain world “leader” thinks, Amazon exists due to this extreme level of customer service. If brick-and-mortar stores would actually take customer needs and service seriously, they would not have these problems. I prefer to buy local when I can. No hot water makes expedient service all the more important.

Muy buen producto y dificil de conseguir pero en Amazon lo encontre inmediatamente y a un excelente precio comparado con otros proveedores

My unit on home furnace needed replacement and these cane it handy. Bought an extra to have on hand in case it fails again during winter time. Good product. 2 years so far with it and no issues.