Temperature probe bad?

cajunfla

Well-known member
Aug 30, 2008
69
0
Pensacola, Fl
#1
Hayward Aqua Plus Pro Logic Controller suddenly showing incorrect temperature of 41f. Air temp is high 70’s to mid 80’s. Instant-read thermometer says water is 75.8. Bad probe, or maybe bad board internally? All other readings/numbers appear normal. Search on amazon doesn’t even show temp probe as available part.
 

ogdento

Bronze Supporter
Mar 30, 2015
171
0
Chico, CA
#2
If you have a multimeter you can measure the resistance of the probe.

Off the top of my head I don't know what value would give 41 degrees, but 10k ohms works out to 76 degrees. I'm sure there's another thread about testing probes on this site that has more resistance/temp values.
 

jblizzle

Mod Squad
LifeTime Supporter
TFP Expert
May 19, 2010
41,197
4
Tucson, AZ
#4
They are free at Harbor Freight ;)

So switch a couple of the probes around in the control panel and see if the bad reading follows the probe or not.

Ignore the SWG temperature as that is a different type of probe that is in the cell.
 

JamesW

TFP Expert
Mar 3, 2011
12,650
2
#5
There is a water temperature, air temperature, cell temperature and a solar temperature (if solar enabled).

Which temperature are you taking about?
 

JamesW

TFP Expert
Mar 3, 2011
12,650
2
#9
Hayward GLX-PC-12-KIT 10K Thermistor Temperature Sensor with 15-Feet Cable Replacement Kit.

The Pentair or Jandy temperature sensor will also work if you can find them cheaper.

There should be a sensor clamped in a pipe somewhere.

You might have a spare sensor from your installation package. Some installation packages include a solar temperature sensor.
 

cajunfla

Well-known member
Aug 30, 2008
69
0
Pensacola, Fl
#11
Hayward GLX-PC-12-KIT 10K Thermistor Temperature Sensor with 15-Feet Cable Replacement Kit.

The Pentair or Jandy temperature sensor will also work if you can find them cheaper.

There should be a sensor clamped in a pipe somewhere.

You might have a spare sensor from your installation package. Some installation packages include a solar temperature sensor.
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