1- REPLACE INDOOR BLOWER MOTOR WITH NEW MARS ECM BLOWER MOTOR. 2- REPLACE LIMIT SWITCHES. 3- REPLACE 3 PHSE SERVICE DISCONNECT. 60 AMP. 4 - REPLACE THERMOSTAT WITH HONEYWELL 5000 STAT. WEATHER MASTERS PERFORMED REPAIRS AND AT THIS TIME THE UNIT IS HEATING. TESTED NEW STAT IN COOLING AND HEATING AND WORKING FINE. NOTE: UNIT IS VERY OLD. WEATHER MASTERS MAKES NO GUARANTEE HOW LONG THE SYSTEM WILL RUN OR LAST DUE TO THE AGE AND OVERALL CONDITION.