Suspect broken TRV on hot water CI

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naivehomeowner
naivehomeowner Posts: 21
in THE MAIN WALL

Firing up the heat this year one radiator remains cold, think it could be the pictured thermostatic valve has failed, probably over 20 years old, dial turns but no heat comes on at any setting, other rads in series heat up. wondering if there is any idiot-proof dyi i could try? before calling (and paying) a plumber, next photo shows the rad other side, thanks

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Comments

  • bburd
    bburd Posts: 1,336

    Have you tried bleeding the radiator? How far above the boiler is the radiator? What is the pressure on the boiler gauge?

    —
    Bburd
  • hot_rod
    hot_rod Posts: 28,585

    snap the actuator off and see if that pin below pushes in and springs back

    Push on it with a flat tool of some sort

    If the pin us stuck the actuator will not control But the thermal cartridge inside the head can fail also

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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