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  1. K

    Pentair Mastertemp 400 CLUNCK

    Just went to start up my Master temp 400 heater and it ignites fine after about 45 seconds it makes a clunk and shuts off (ignition) the temp on the control panel goes from 50 to 120 and then back down to 50 and then it restarts the process and ignites again. Anyone have any ideas what this...
  2. K

    Pentair ic40 acting UP

    Ic 40 acting up High salt light blinking alternating with check cell light blinking. Cell is clean...have cleaned three times now. Salt is high 4100 Check hours it says 6000 Not making cl HELP!