By Hayward Pool Products
Part # SMX306000024
Dimensions 78" X 1/8"
Alternate Part #'s _SMX306000024, HAYSMX306000024, HPPSMX306000024
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it has a error message of Suction temperature probe is short circuited or maybe defective it this it on a 21404t heat pro hayward heater
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Hi. Based the info I found it may be the defrost sensor. I would recommend that you have a technician inspect the unit to confirm.
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Will this solve an inaccurate temperature read out? My heater is reading a negative degree so heater won’t come on
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This May solve the issue. You might also want to check the calibration of the control also
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