Rheem R-410A - Defrost Mechanical Checks Flow Chart

18.5 Defrost Mechanical Checks Flow Chart
DEFROST SYSTEM
No Defrost Incomplete Defrost Excessive Defrost
Reversing Valve Stuck Poor Sensor Location
Wrong Defrost
Timer Setting Poor Sensor Location
Failed Defrost Relay Low System Charge
(doesn’t stop O.D. Fan)
Welded Rev Valve Thermostat Satisfies Wind Affecting
Relay During Defrost in Defrost
Loose Defrost
Sensor
Check Coil Sensor
Connector
43