Upon arrival spoke with homeowner about issue. He said the REME LED was not turning on when the system was running. Turned the Blower Fan on to test. The REME was not turning on. Measured pressure across the switch at around 0.18” WC, with the switch rated at 0.14” WC. Increased the Blower speed in increments of 10% starting at 55% until the REME would turn on at 85%. Left blower speed set to 85%. Turned system to heating mode and in second stage heating the REME would also turn on. Tested in AC mode and it was not enough airflow/pressure to turn the REME on. Moved the locations of the tubing for the pressure switch in the ductwork and that did not change the readings. REME is currently working in Heating Mode and Constant Fan. Let Lee know we would see if there is either a lower rated Pressure switch we can use, or if there is a relay that we could install instead of the pressure switch. Let him know we would follow up with him next week.