I have a Sta-Rite SR333NA at a pool I've recently taken over from my in-laws. The heater has worked inconsistently for years. Looking into the error code, it's the SFS (Stack Flue Sensor) that's at fault. I found a very helpful set of videos on YouTube (Part I: ; Part II: ) detailing the work that I've now gotten into.
My situation does seem to be very much in line with the video's situation (high exhaust temps, shutting off after a few minutes, service heater light on, and now that I've dug into it, buildup and liming on the coils). You can see the liming evidenced after a pressure wash in the picture of the heating coils below. I now have two issues that I'm trying to resolve:
1. Have I done enough with the pressure washing to delime the coils? I'm tempted to use CLR (or something else on a recommendation) to further get at that buildup before I close it back up and put it in service. Any experience and/or recommendations?
2. Mice have clearly cozied up in the insulation that was under the stainless steel bowl that the coils sit in. There's also plenty of char, lime and perhaps a little more chewed up bits taken out of the insulation (see the other picture). I assume I should be replacing this insulation, and am wondering if I need to get the OEM kit or if a hardware store would sell sufficient material that I could cut to fit? I have enough of each piece that I could attempt to match them, but was wondering if anyone has gone this route?
Thanks all,
Tim
My situation does seem to be very much in line with the video's situation (high exhaust temps, shutting off after a few minutes, service heater light on, and now that I've dug into it, buildup and liming on the coils). You can see the liming evidenced after a pressure wash in the picture of the heating coils below. I now have two issues that I'm trying to resolve:
1. Have I done enough with the pressure washing to delime the coils? I'm tempted to use CLR (or something else on a recommendation) to further get at that buildup before I close it back up and put it in service. Any experience and/or recommendations?
2. Mice have clearly cozied up in the insulation that was under the stainless steel bowl that the coils sit in. There's also plenty of char, lime and perhaps a little more chewed up bits taken out of the insulation (see the other picture). I assume I should be replacing this insulation, and am wondering if I need to get the OEM kit or if a hardware store would sell sufficient material that I could cut to fit? I have enough of each piece that I could attempt to match them, but was wondering if anyone has gone this route?
Thanks all,
Tim