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weil-mc lain GV-3

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harvey
harvey Member Posts: 153
in THE MAIN WALL
has anyone come across a problem making the pressure switch on this boiler. without intake or exhaust piping the switch still won't make. switch is operating in it's proper range. heat exchanger has been vacuumed out. your thoughts? thanks

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  • Floyd
    Floyd Member Posts: 429
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    Had one once ....

    that the tubing was cracked....
    they use a rubber type tubing to the switch and it can get
    old and brittle, don't take much to make it not work.
    How old is this one???

    Floyd
  • Dan Foley1
    Dan Foley1 Member Posts: 55
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    GV-3


    Sounds like the heat exchanger sections are plugged with soot and scale. Short of breaking the sections apart, I have yet to figure out a way to clean scale out of the serpentine sections. You can confirm this by measuring the pressure differential across the heat exchanger with a Magnahelic guage. Good Luck! -DF
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