Hi no dramas with mine so far. Its possible the part that bolts to the block has been damaged? This I think is a capillery tube that relys on expansion of what ever fluid is inside the tube to operate the alarm. Simular to the old smiths temp gauges, brass line with brass bulb.
If that is the case a crease or kink or loss of whatever is inside the tube will cause the temp side of things not to work. Only guessing it might just be a faulty unit??
Ring whoever you got it from they might be more helpful.
Andrew


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