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This was bought from the HM store with the TC surface mount stuff pre-soldered. So that wasn't my handy work :) . It says No Probe. So, some discouraging results.... Presuming I am measuring the proper spots, I measured about 1.53V. It seemed really finicky though.. at one point it was 1.0V...

Tried the thermocouple amp test to the best of my ability. Using a AA battery (not sure this is enough to make the test work), which measured 1.48V, hooked up as instructed. Best measurement was 1.36V with most being down about 1V.

Shorted the pins, still ~561F. Can I try the thermocouple amp testing even after things have been mounted? Yes I see the warning about the 3V limit, but didn't know if I can still use the same test. Anything obvious on these pics?

Thanks as usual Bryan, will try tonight.

First build, HM 4.2.4 w/ thermocouple pit. After installing in a case, I am getting a reading of 561f [plus/minus 3f] on the pit probe. Everything else seems to function fine including the thermistor probes. I just got the Adapt-a-Damper working tonight as well so almost ready to put it in...

Bryan, I'll keep an eye on it and will reach out if it reoccurs. Thanks for the quick followup and details.

How long is the config expected to persist once set? I had this issue, then updated it to thermocouple and it was fixed. The next day I plugged in the HM again and the config had reverted to thermistor. Sorry if I am thread hijacking; will repost if needed.