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Have an FV I crashed to 34 from 73 yesterday. Came in today and it was still running and said 37. That's unusual. Incoming valve was iced up. Should have been at 34 based on past performance. Let it go another 1-2 hours and still 37. Checked the chiller and the reservoir temp was 28-29. Set point is 29. Shut off valves and lowered another FV a couple degrees to see if it would lower -- it did. Back to problem FV, both the in and out were less than 37 (infrared gun on the pex). WTF? Is it a thermocouple prob? I did draw a quart off the sample a couple times to try to measure the actual, and it was ~36. Not sure what to think at this point. Appreciate any help.
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