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System 2000 oil fired boiler

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skyline137
skyline137 Member Posts: 12
in Domestic Hot Water
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I have a system 2000 oil fired heating system. I’ve noticed a problem with the hot water supply. A few days ago the temperature outside reached 80F. I turned all of my heat thermostats to 45F (they are the old round Honeywell type). I turned on the central AC. My daughter took her usual long shower and I noticed that on one zone (5)

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the baseboard was hot. I checked the boiler lights and the circulator and burner lights were illuminated for hot water. The manifold pipe for zone 5 was hot 1-4 were cold. The images are attached. Zone 5 is for my living room.

Comments

  • skyline137
    skyline137 Member Posts: 12

    Nobody commented on my post but I figured it out myself…zone valve is stuck open.

  • Roger
    Roger Member Posts: 473

    Good sleuthing, @skyline137 !

    A good clue is that the zone output light for zone 5 is off, so it was not open from the control, but mechanically stuck as you determined.

    Best,

    Roger

    President
    Energy Kinetics, Inc.

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