Arrived on site. Powered down tankless water heater. Shutoff water to home, and drained system. Replaced factory provided pressure switch under warranty. Pressurized water system, turned on tankless water heater. No leaks are present at new connection. Replaced factory provided pressure switch cable. Rewired cable to new terminals as directed by Marcolla at factory tech support. Set pressure to 64.5 PSI. Cycle tested multiple times while drawing water at fixtures. Pump is cycling and operating as designed. Thank you for choosing CPI Plumbing and Heating Inc.