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Laars Endurance Return Thermistor Fault

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BILL_103
BILL_103 Member Posts: 1
in THE MAIN WALL
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  • Tim_54
    Tim_54 Member Posts: 2
    LAARS Endurance return Thermistor Fault

    Hi, I have a Laars Endurance Heat/Hot water system and I have an F-6 fault. I looked in the manual and it says it's the return thermistor. Located the thermistor. Question is, does the system have to be shut off and drained to replace? Looks simple enough, just unscrew nut on pipe and replace, but will water pour out while replacing? Also, where can I order one of these? I'm located in Plymouth,Ma. Thanks!
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