Found a SFS (Stack Flue Sensor) error on my control board. Being an electrician I checked the resistance (Fluke 1187) on the sensor with an outside air temp of 70 degrees F and found 2.8 kOhms. Through this forum I found out 2.8 kOhms didn't seem right as someone previously posted it should be 3.5 MOhms at 25 degrees C (77F). I believe the control board saw a flue temp of 486F at 2.8kOhms.
I had a 6.7kOhm resistor at home and put it in place of the sensor and the control board now read 406 degrees F which allowed my heater to run until I could get a replacement sensor. I also used a temperature gun to ensure my flue temp was nowhere near 400 degrees. It ran about 250-275.
Purchased 3 sensors on Amazon for next day delivery and measured them and here are the results in Ohms:
Now I will try to see if Pentair will send me a new sensor for my my less than 2 year old heater, as a homeowner and electrician rather than a pool service contractor. Bonus if they pay me for labor!
I had a 6.7kOhm resistor at home and put it in place of the sensor and the control board now read 406 degrees F which allowed my heater to run until I could get a replacement sensor. I also used a temperature gun to ensure my flue temp was nowhere near 400 degrees. It ran about 250-275.
Purchased 3 sensors on Amazon for next day delivery and measured them and here are the results in Ohms:
| Temp (F) | Probe 1 | Probe 2 | Probe 3 |
32 | 14300000 | 14500000 | 13300000 |
70 | 4200000 | 4100000 | 4200000 |
212 | 154000 | 152000 | 143000 |
Now I will try to see if Pentair will send me a new sensor for my my less than 2 year old heater, as a homeowner and electrician rather than a pool service contractor. Bonus if they pay me for labor!
