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September 11, 2022 at 9:45 am #6359
Thanks Brad. The house was built on top of a grid of I-joists on the concrete foundation. The M1XRF319 and M1XRFTWM are installed in the basement. The farthest sensor is only 25 feet from its receiver. I will move both units to the 1st floor to see if this corrects my issue: on very rare occasions a sensor does not get the signal to the panel. Hoping all that steel is the problem.