Recent content by doddsilla

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    Pentair Mastertemp 400 immediately shuts off after boot

    I think I solved it. I did a search on EasyTouch heater control problems and ran across this post: Have manual heat, but no control from EasyTouch Panel I turned the heater on and set the temp to 104 (the highest setting). Once I did that, the heater would activate using the phone control...
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    Pentair Mastertemp 400 immediately shuts off after boot

    I checked the wiring on the board and it looks fine to me. I think if the wiring was bad, it would never send the signal to the heater to start in the first place.
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    IMG_1701.jpeg

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    Pentair Mastertemp 400 immediately shuts off after boot

    Update: Replaced the stack flue sensor and reset system breakers. I was then able to turn on the heater manually and the blower/ignition started pumping out hot water. Success! I then turned everything off, rewired the ET Fireman's Switch and tried to turn on the spa and heater with my phone...
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    Pentair Mastertemp 400 immediately shuts off after boot

    Thx for the response. So, I followed your advice and disconnected the Fireman's Switch and connected the two yellow wires. I tried turning on the heater with the touchpad, and nothing kicked off. In order to bypass the touchpad, I removed the connection from the circuit board and shorted the...
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    Pentair Mastertemp 400 immediately shuts off after boot

    Thanks for the response. My heater is a 2018, so I'm not sure if it has a Fireman's Switch. I took a look at the spot where the switch "should" be (I think) and it looks like the yellow wires are connected to a control line that goes to the EasyTouch control box. I checked the fuse above it...
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    1627907509899.jpeg

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    Pentair Mastertemp 400 immediately shuts off after boot

    My heater was working fine, then about two weeks ago it started to shut down immediately after booting up (no blower, no ignition) and the buttons on the front would not work (had to use ScreenLogic to turn it on). I had a pool service tech take a look and he thought I needed a new control...