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Thread: Pentair master temp 400 - lights up then lights go off.

  1. Back To Top    #1

    Join Date
    Oct 2013
    Location
    Phoenix, AZ
    Posts
    25

    Pentair master temp 400 - lights up then lights go off.

    Hello everyone,

    Very happy to have found this board as I'm trying to maintain and run my pool/spa myself, but have a ton of questions.

    I'm trying to kick on my heater to heat the spa for the first time (bought house in June) and the initial lights kick on and read r=8 or something similar and then about two seconds later the lights turn off and I'm unable to do anything. I've hit the heat spa and heat pool buttons but they are not working.

    I know it originally worked when I bought the house because the previous homeowner showed me how to run it. Since then we've had to replace the salt clorinator and the panel that goes along with it. I'm hoping they didn't mess something up.

    Again, the lights on the master temp kick on initially then disappear.

    I appreciate any feedback.
    Size of pool (gallons) = 15,000
    Pool Type: is IG (in ground)
    Construction: Plaster
    Filter type: DE
    Filter Manufacturer: SM/SMBW 2000 Series
    the size, model number or flow rate of the filter.
    Pump in HP = 2
    Pump is two speed
    Date of pool build/install = circa 2001
    with spa

  2. Back To Top    #2

    Join Date
    Oct 2013
    Location
    Phoenix, AZ
    Posts
    25

    Re: Pentair master temp 400 - lights up then lights go off.

    To answer my own question..

    What happened was we installed an X10 switch to control the pool light. It must control the power to the heater as well. When the pool light is on, the heater works. I'll have to find a fix for this down the road. First time kicking this heater on was a success, took about 15-20 minutes to heat the spa to 100 degrees from 70 degrees. It sure has a little roar to it while it going. Scary for the initial start. I'll have to log my gas usage for the day to see how much it costs to heat the spa.
    Size of pool (gallons) = 15,000
    Pool Type: is IG (in ground)
    Construction: Plaster
    Filter type: DE
    Filter Manufacturer: SM/SMBW 2000 Series
    the size, model number or flow rate of the filter.
    Pump in HP = 2
    Pump is two speed
    Date of pool build/install = circa 2001
    with spa

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Pentair master temp 400 - lights up then lights go off.

    Welcome to TFP!!!

    Glad you got it figured out ... that would have been difficult for us to come up with
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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