Waterfurnace Envision NDV049 heating equipment tune up, maintenance, safety inspection, run testing. Upon arrival and initial inspection homeowner indicated a diagnostic LED flashing but stated all functions appear to be working normal. Currently the airflow LED and DHW LEDs are both flashing steady and neither will reset with any low voltage or high voltage power cycles. Complete all run testing, cleaning, and inspections before proceeding to tech support for additional information. Based on tech support Aarons guidance all functions & dip switches are set correctly and the premier control board appears to be actively failing by sending out false diagnostic signals to the LED display control board. Recommend replacing premier control board based on its current status and to prevent any complete breakdowns or no heat/cool conditions in the near future Also recommend less dense air filter to prevent high static pressures and excessive RPMs of the variable speed motor. MERV 8-11