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  1. M

    Mastertemp 400 Heater

    I don't at the moment, I can get some of the HLS, they looked good. I couldn't really see inside the port on the manifold even when I had it off. But I can try...
  2. M

    Mastertemp 400 Heater

    Thank you...I'll give the paste a try!
  3. M

    Mastertemp 400 Heater

    Fixed the heater issue by replacing the internal bypass valve. It was pretty easy... but I cannot get the new HLS switch to tighten. I cleaned the inside of the port (had a lot of old Teflon tape in there). I re Teflon taped it and it still will not tighten all the way. It will get snug and...
  4. M

    Mastertemp 400 Heater

    I did, it was in Pentair packaging and pre-wrapped in Teflon tape... I'll get a better look at the threads in the manifold this weekend as I'm going to have to get in there to replace the internal bypass valve.
  5. M

    Mastertemp 400 Heater

    Thank you! I Think I found it. The internal bypass valve broke off. Found the piece stuck at my salt generator. Now Ill tackle this project next weekend! Another quick question. I noticed my replaced HLS was leaking. I removed and re tephlon taped but it doesn't see to screw in tight. It will...
  6. M

    Mastertemp 400 Heater

    My Mastertemp 400 heats up to about 83 degrees, the burner shuts off, the service heater light comes on, then it restarts. It continues this cycle until it reaches the desired temperature. I have replaced the thermoregulator and the HLS sensor. Not sure what else to do?