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Thread: Totaline P374 wiring diagram

  1. #1

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    Totaline P374 wiring diagram

    Below is a typical wiring diagram for a totaline P374 Thermostat.

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    This is a subbase on a totaline P374 thermostat.
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  2. #2
    Junior Member

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    I want to use the Totaline P374 thermostat that I have, in my travel trailer. There are only two wires. Can I do this and where do I connect the wires?

  3. #3
    HVAC Thermostat Specialist

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    What is the manufactures name and model number of the unit that you are connecting the totaline P374 thermostat to? If the equipment is a heat pump, or heat only or cool only, you must have a common wire on a totaline P374 series thermostat. You only have 2 wires. The p374 will probably not work on your system unless you connect the a common wire.

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