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Zone heating: one floor too hot

I recently had to change the thermocouple on my heater because the pilot light went out and would not stay on when lit.  When I turned on the zones (all separate electrically), my second floor overheated (thermostat set for 68 degrees, room temperature increased to 82 degrees).  I turned off all zone electrical switches to stop the furnace. Do you think this is a valve problem?


  • RobbieDo
    RobbieDo Member Posts: 131

    I'm assuming you have a boiler, but then you say furnace? Is it a zoned forced hot air system? Is the stat working properly, have to check at set temp that the stat is opening the circuit?
  • Bernadette
    Bernadette Member Posts: 2
    Response to Hot

    Thank you for responding.

    Sorry for the confusion, it is a boiler for hot water heat (radiator).

    The first thing I did was check each floor's thermostat to verify the temperatures that turn on the heat.  Each floor was different.  However, I don't remember what the temperatures were, but do remember that the were in the 60s.
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