Replacing thermistor no longer working

[Amybee]

Hi . . . This forum has been very helpful over the last few years with allowing me to replace the thermistor rather than the whole Aqua Rite board. Now; however, I have the same issue . . . No power light, no chlorine generating, and a generating light that comes on briefly and goes off. I replaced the thermistor maybe two years ago and it has been working great. A month ago, the symptoms came back, and I replaced the thermistor again. This fixed the issue for a few weeks, but the symptoms returned. I again replaced the thermistor and it won't fix the issue anymore. I also replaced the fuse and fuse holder for good measure. No luck. Is there anything else I could try, or am I looking at a new board?

i am not sure exactly how old the current board is or what model it is.

Thanks so much for any assistance.

 

[chiefwej]

It could be the transformer. But, other that diagnosing and replacing one input resistor, and a flow switch, I've never had any experiance with it. I can't believe how many times you've had this problem. Maybe something else is causing the resistor to fail. Which part number did you use? Was it this one?

http://www.digikey.com/product-search/en?keywords=SL32%202R025

 

[JamesW]

Can you post the diagnostics?

 

[Amybee]

Hey...yes, this was the part:

http://www.digikey.com/product-search/en?keywords=SL32 2R025

 

[Amybee]

Can you post the diagnostics?

Hi . . . yes:

3100
85
0.0
0.00
63P
-0
AL-0
1.40

I am not sure if this would have messed something up, but the thermistor before the one I have on now was difficult to get on. It was a little long and touched the front panel, making it loose. It worked for a couple weeks maybe. I then re-soldered it on, but I think I may have put it on backwards. (I know . . . ugh). It still worked for a little while, then when it stopped working I replaced it with the one I have now which doesn't work at all. This one appears to be installed correctly.

Also, the fuses I have been using for a couple years now are fast and not the slo-blow (couldn't find those). Not sure if that matters.

Thanks so much for everyone's help.

 

[JamesW]

The zero volts is the key number. It could be the thermistor, transformer, wires or rectifiers. Google aquarite diagnostics manual.

 

[Amybee]

Thanks. Do you think this is looking like a good time to call in an expert to take a look, or is it a do it yourself job?

 

[chiefwej]

It sounds like it may just be a botched repair job. If you have to replace the main PC board it about $100 for a new one.

 

[Amybee]

Where is the best place to get a new board? Are they all standard?