Funmit 42002-0024S Stack Flue Sensor Replacement for Pentair Sta-Rite MasterTemp Max-E-Therm Pool and Spa Heater Electrical System SR200 SR333 SR400

Perfect fit

Popped it in and my heater started right up. So far, so good!

Worked fine for an OEM replacement. We've had the heater running for about two weeks now with zero issues. This part tasks less than five minutes to replace.

We will see about longevity but received quickly and easy to install and immediately got my pool heater back up and running.

Junk. Already having to replace it after less than a handful of uses.

Pool heater would fire up for a less than a minute then shut itself off with a red light under "Service Heater". Followed the manual's troubleshooting flowchart which wanted me to check gas pressures and water flow but decided to do some forum reading and watch Youtube videos. Was able to hold one of the control buttons on the heater when it started up and saw with the pool heater just fired and a cold to the touch exhaust the factory installed Stack Flue Sensor (SFS) was reading over 300*F.Ordered two of these, one to keep as a spare. Installed in 10 minutes and saved my parents from buying a replacement heater at the start of our summer season.

It works. It was super easy to install and got my heater working again at the fraction of the cost of the OEM part. Its a fantastic value and saved me a ton of money by allowing me to do the repair myself.

Worked perfect. Easy to install. Was able to use the troubleshooting guide in owners manual and thru process of checking a couple of other components determine this was the part needed. Installed and heater ran perfectly.