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What is this putty holding the sensor in drywell of indirect tank?
My aquastat was showing bad readings, upon inspection I found that the sensor was held in the drywell on the indirect water tank by some kind of putty that had dried and cracked letting the sensor come out a little and start reading the ambient air. How should the sensor be fixed in the drywell on the indirect tank? Is this putty the right stuff, if so - what is it so I can get some more to replace the cracked putty.
thanks in advance for your help,