Jacuzzi heater won't turn off

maxl49

New member
Mar 28, 2021
4
Quebec
Hello,
I'm new here and looking for help troubleshooting my 10-12 years old Jacuzzi 270.
The heater won't turn off after it reaches the required temperature. It only stops when the tub goes into watchdog mode (the three dashes"---"), way past the 104 maximum. If I reset the breaker it sometimes fixes the problem for a while, sometimes not.
I've confirmed with another thermometer that the temprature shown on the display is correct.
I've changed that heater about a year ago and it worked fine until now. Not sure if it's relevant, but I also changed the flow switch recently and the circ pump about 2 years ago.

Should I replace the temp sensor anyway even if the temp shown is correct? Or could this be a control board issue ?

Any help would be greatly appreciated, thanks

Max
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
24,960
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Welcome to TFP.

Is this heater in a pool or a standalone spa?

Give us some model numbers and pictures.
 

maxl49

New member
Mar 28, 2021
4
Quebec
Welcome to TFP.

Is this heater in a pool or a standalone spa?

Give us some model numbers and pictures.
This is a standalone jacuzzi j270. See picture. The heater I replaced last year is this one :

Thanks !
 

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